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Pesticide resistance
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<h2 id="causes">Causes</h2> <p>Pesticide resistance probably stems from multiple factors: </p> <ul><li>Many pest species produce large numbers of offspring, for example insect pests produce large broods. This increases the probability of mutations and ensures the rapid expansion of resistant populations.</li> <li>Pest species had been exposed to natural toxins long before agriculture began. For example, many plants produce <a href="/facts/Phytotoxins/mE1yabAu">phytotoxins</a> to protect them from herbivores. As a result, coevolution of herbivores and their host plants required development of the physiological capability to detoxify or tolerate poisons.<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a><a class="footnote-ref" id="fnref:11" href="#fn:11"><sup>11</sup></a> Secondary metabolites or allelochemicals produced by plants inhibit insect feeding, but insects have evolved enzymes to metabolize or detoxify them by converting them into non-toxic metabolites. The same enzymes may also detoxify insecticides by converting <a href="/facts/Lipophilicity/AWpsR8Xe">lipophic</a> compounds into ones that are excreted or otherwise removed from the insect. Greater exposure to insect-inhibiting secondary metabolites or allelochemicals is more likely to increase pesticide resistance. One group of chemicals produced by insects to detoxify toxins are <a href="/facts/Esterase/Ff2bb7LD">esterases</a> which can detoxify organophosphates and pyrethroid. Conditions that affect how resistant some insects are to insecticides include exposure to different amounts of secondary metabolites or allelochemicals, which are variable among plant species in response to different degrees of herbivory pressure. The way an insect feeds on a plant impacts their exposure; insects that feed on the vascular tissue (<a href="/facts/Sap/cxdgQYP8">sap</a> sucking insects like <a href="/facts/Aphid/kbvClSLl">aphids</a>) are generally exposed to less insect-inhibiting compounds than insects that consume the leaves. Plants produce a wide range of defensive chemical compounds and generalist insects that feed on different types of plants can increase their exposure to them increasing their likelihood of developing pesticide resistance.<a class="footnote-ref" id="fnref:12" href="#fn:12"><sup>12</sup></a></li> <li>Humans often rely almost exclusively on pesticides for pest control. This increases selection pressure towards resistance. Pesticides that fail to break down quickly contribute to selection for resistant strains even after they are no longer being applied.<a class="footnote-ref" id="fnref:13" href="#fn:13"><sup>13</sup></a></li> <li>In response to resistance, managers may increase pesticide quantities/frequency, which exacerbates the problem. In addition, some pesticides are toxic toward species that feed on or compete with pests. This can paradoxically allow the pest population to expand, requiring more pesticides. This is sometimes referred to as <i>the pesticide trap</i>,<a class="footnote-ref" id="fnref:14" href="#fn:14"><sup>14</sup></a><a class="footnote-ref" id="fnref:15" href="#fn:15"><sup>15</sup></a> or a <i>pesticide treadmill</i>, since farmers progressively pay more for less benefit.<a class="footnote-ref" id="fnref:16" href="#fn:16"><sup>16</sup></a></li> <li>Insect predators and parasites generally have smaller populations and are less likely to evolve resistance than are pesticides' primary targets, such as mosquitoes and those that feed on plants. Weakening them allows the pests to flourish.<a class="footnote-ref" id="fnref:17" href="#fn:17"><sup>17</sup></a> Alternatively, resistant predators can be bred in laboratories.<a class="footnote-ref" id="fnref:18" href="#fn:18"><sup>18</sup></a></li> <li>Pests with limited viable range (such as insects with a specific diet of a few related crop plants) are more likely to evolve resistance, because they are exposed to higher pesticide concentrations and has less opportunity to breed with unexposed populations.<a class="footnote-ref" id="fnref:19" href="#fn:19"><sup>19</sup></a></li> <li>Pests with shorter <a href="/facts/Generation_time/J7m8p79J">generation times</a> develop resistance more quickly than others.<a class="footnote-ref" id="fnref:20" href="#fn:20"><sup>20</sup></a></li> <li>The social dynamics of farmers: Farmers following the common practices of their peers is sometimes problematic in this case. Overrelying on pesticides is a popular mistake and becomes increasingly popular as farmers conform to the practices around them.<a class="footnote-ref" id="fnref:21" href="#fn:21"><sup>21</sup></a></li> <li>Unfamiliarity with variation in <a href="/facts/Regulatory_enforcement/7N9pPSQP">regulatory enforcement</a> can hamper policy makers' ability to produce real change in the course of resistance evolution.<a class="footnote-ref" id="fnref:22" href="#fn:22"><sup>22</sup></a></li></ul> <h2 id="examples">Examples</h2> <p>Resistance has evolved in multiple species: resistance to <a href="/facts/Insecticide/1xYL3MSD">insecticides</a> was first documented by A. L. Melander in 1914 when scale insects demonstrated resistance to an inorganic insecticide. Between 1914 and 1946, 11 additional cases were recorded. The development of organic insecticides, such as <a href="/facts/DDT/RfYXlCuF">DDT</a>, gave hope that insecticide resistance was a dead issue. However, by 1947 <a href="/facts/Housefly/GFbeB3In">housefly</a> resistance to DDT had evolved. With the introduction of every new insecticide class – <a href="/facts/Cyclodiene/MuqTtLJ1">cyclodienes</a>, <a href="/facts/Carbamates/3lNmyxgQ">carbamates</a>, <a href="/facts/Formamidinium/dhB1LGfz">formamidines</a>, <a href="/facts/Organophosphates/u4U9GS4z">organophosphates</a>, <a href="/facts/Pyrethroids/Lf1N0STQ">pyrethroids</a>, even <i><a href="/facts/Bacillus_thuringiensis/aVv32jHV">Bacillus thuringiensis</a></i> – cases of resistance surfaced within two to 20 years. </p> <ul><li>Studies in America have shown that <a href="/facts/Drosophila/P4K7RkJl">fruit flies</a> that infest orange groves were becoming resistant to <a href="/facts/Malathion/1Atv79Yf">malathion</a>.<a class="footnote-ref" id="fnref:23" href="#fn:23"><sup>23</sup></a></li> <li>In <a href="/facts/Hawaii/ImxFefeK">Hawaii</a>, <a href="/facts/Japan/U5mz0SRT">Japan</a> and <a href="/facts/Tennessee/A3mLY9bu">Tennessee</a>, the <a href="/facts/Diamondback_moth/oz8vlFct">diamondback moth</a> evolved a resistance to <i><a href="/facts/Bacillus_thuringiensis/aVv32jHV">Bacillus thuringiensis</a></i> about three years after it began to be used heavily.<a class="footnote-ref" id="fnref:24" href="#fn:24"><sup>24</sup></a></li> <li>In England, rats in certain areas have evolved resistance that allows them to consume up to five times as much <a href="/facts/Rat_poison/unEUuByD">rat poison</a> as normal rats without dying.<a class="footnote-ref" id="fnref:25" href="#fn:25"><sup>25</sup></a></li> <li>DDT is no longer effective in preventing <a href="/facts/Malaria/rN3g58CX">malaria</a> in some places.<a class="footnote-ref" id="fnref:26" href="#fn:26"><sup>26</sup></a> Resistance developed slowly in the 1960s due to <a href="/facts/Insecticide_application/xuTAo6qu">agricultural use</a>. This pattern was especially noted and synthesized by Mouchet 1988.<a class="footnote-ref" id="fnref:27" href="#fn:27"><sup>27</sup></a><a class="footnote-ref" id="fnref:28" href="#fn:28"><sup>28</sup></a></li> <li>In the southern United States, <i><a href="/facts/Amaranthus_palmeri/QqSad5Cl">Amaranthus palmeri</a></i>, which interferes with <a href="/facts/Cotton/efXRcjbn">cotton</a> production, has evolved resistance to the herbicide <a href="/facts/Glyphosate/dS72T7VY">glyphosate</a><a class="footnote-ref" id="fnref:29" href="#fn:29"><sup>29</sup></a> and overall has resistance to five <a href="/facts/Site_of_action/Sjk8vfV4">sites of action</a> in the southern US as of 2021<a href="https://en.wikipedia.org/w/index.php?title=Pesticide_resistance&action=edit">[update]</a>.<a class="footnote-ref" id="fnref:30" href="#fn:30"><sup>30</sup></a></li> <li>The <a href="/facts/Colorado_potato_beetle/NV6TJ53V">Colorado potato beetle</a> has evolved resistance to 52 different compounds belonging to all major insecticide classes. Resistance levels vary across populations and between <a href="/facts/Beetle/hv33fxsL">beetle</a> life stages, but in some cases can be very high (up to 2,000-fold).<a class="footnote-ref" id="fnref:31" href="#fn:31"><sup>31</sup></a></li> <li>The <a href="/facts/Cabbage_looper/jxdeT4I4">cabbage looper</a> is an agricultural pest that is becoming increasingly problematic due to its increasing resistance to <i>Bacillus thuringiensis,</i> as demonstrated in Canadian greenhouses.<a class="footnote-ref" id="fnref:32" href="#fn:32"><sup>32</sup></a> Further research found a genetic component to Bt resistance.<a class="footnote-ref" id="fnref:33" href="#fn:33"><sup>33</sup></a></li> <li>The widespread introduction of <i><a href="/facts/Rattus_norvegicus/6KzSs2qg">Rattus norvegicus</a></i> (the brown rat) combined with the widespread use of <a href="/facts/Anticoagulent_rodenticide/unEUuByD">anticoagulent rodenticides</a> such as warfarin has produced almost equally widespread resistance to <a href="/facts/Vitamin_K_antagonist_rodenticide/MhptmPww">vitamin K antagonist rodenticides</a> around the world.<a class="footnote-ref" id="fnref:34" href="#fn:34"><sup>34</sup></a></li> <li>In aquatic environments, non-target organisms have also demonstrated pesticide resistance. A study on <i>Gammarus roeselii</i> and <i>Hyalella azteca</i> found that after only two generations of exposure to the neonicotinoid thiacloprid, tolerance levels nearly doubled. The research suggests that developmental plasticity, rather than genetic mutations alone, may contribute to rapid resistance in some species. <a class="footnote-ref" id="fnref:35" href="#fn:35"><sup>35</sup></a></li></ul> <h2 id="consequences">Consequences</h2> <p>Insecticides are widely used across the world to increase agricultural productivity and quality in <a href="/facts/Vegetable/j3AlDG64">vegetables</a> and <a href="/facts/Grain/C00uWDPs">grains</a> (and to a lesser degree the use for <a href="/facts/Vector_control/JoX84wM7">vector control</a> for livestock). The resulting resistance has reduced function for those very purposes, and in vector control for humans.<a class="footnote-ref" id="fnref:36" href="#fn:36"><sup>36</sup></a> </p> <h2 id="multiple-and-cross-resistance">Multiple and cross-resistance</h2> <ul><li>Multiple-resistance pests are resistant to more than one class of pesticide.<a class="footnote-ref" id="fnref:37" href="#fn:37"><sup>37</sup></a> This can happen when pesticides are used in sequence, with a new class replacing one to which pests display resistance with another.<a class="footnote-ref" id="fnref:38" href="#fn:38"><sup>38</sup></a></li> <li><a href="/facts/Cross-resistance/0fWdEAPe">Cross-resistance</a>, a related phenomenon, occurs when the genetic mutation that made the pest resistant to one pesticide also makes it resistant to others, often those with a similar <a href="/facts/Mechanism_of_action/Sjk8vfV4">mechanism of action</a>.<a class="footnote-ref" id="fnref:39" href="#fn:39"><sup>39</sup></a></li></ul> <h2 id="adaptation">Adaptation</h2> <p>Pests becomes resistant by evolving physiological changes that protect them from the chemical.<a class="footnote-ref" id="fnref:40" href="#fn:40"><sup>40</sup></a> </p><p>One protection mechanism is to increase the number of copies of a <a href="/facts/Gene/e1swwPY6">gene</a>, allowing the organism to produce more of a protective <a href="/facts/Enzyme/DSI1Fh7y">enzyme</a> that breaks the pesticide into less toxic chemicals.<a class="footnote-ref" id="fnref:41" href="#fn:41"><sup>41</sup></a> Such enzymes include <a href="/facts/Esterase/Ff2bb7LD">esterases</a>, <a href="/facts/Glutathione_transferase/4Nfd68PE">glutathione transferases</a>, <a href="/facts/Aryldialkylphosphatase/WwMfv3EQ">aryldialkylphosphatase</a> and mixed microsomal oxidases (<a href="/facts/Oxidase/MWIPq1cQ">oxidases</a> expressed within <a href="/facts/Microsome/lfk77HsN">microsomes</a>).<a class="footnote-ref" id="fnref:42" href="#fn:42"><sup>42</sup></a> </p><p>Alternatively, the number and/or sensitivity of <a href="/facts/Biochemical_receptor/tjTAC76a">biochemical receptors</a> that bind to the pesticide may be reduced.<a class="footnote-ref" id="fnref:43" href="#fn:43"><sup>43</sup></a> </p><p>Behavioral resistance has been described for some chemicals. For example, some <i><a href="/facts/Anopheles/SoWzqURV">Anopheles</a></i> mosquitoes evolved a preference for resting outside that kept them away from pesticide sprayed on interior walls.<a class="footnote-ref" id="fnref:44" href="#fn:44"><sup>44</sup></a> </p><p>Resistance may involve rapid excretion of toxins, secretion of them within the body away from vulnerable tissues and decreased penetration through the body wall.<a class="footnote-ref" id="fnref:45" href="#fn:45"><sup>45</sup></a> </p><p>Mutation in only a single gene can lead to the evolution of a resistant organism. In other cases, multiple genes are involved. Resistant genes are usually autosomal. This means that they are located on <a href="/facts/Autosomes/uN3B2AhI">autosomes</a> (as opposed to <a href="/facts/Allosome/PGYGkTQM">allosomes</a>, also known as sex chromosomes). As a result, resistance is inherited similarly in males and females. Also, resistance is usually inherited as an incompletely dominant trait. When a resistant individual mates with a susceptible individual, their progeny generally has a level of resistance intermediate between the parents. </p><p>Adaptation to pesticides comes with an evolutionary cost, usually decreasing relative fitness of organisms in the absence of pesticides. Resistant individuals often have reduced reproductive output, life expectancy, mobility, etc. Non-resistant individuals sometimes grow in frequency in the absence of pesticides - but not always<a class="footnote-ref" id="fnref:46" href="#fn:46"><sup>46</sup></a> - so this is one way that is being tried to combat resistance.<a class="footnote-ref" id="fnref:47" href="#fn:47"><sup>47</sup></a> </p><p><a href="/facts/Calliphoridae/fcWGgYy9">Blowfly</a> maggots produce an enzyme that confers resistance to <a href="/facts/Organochloride/IbblBkcB">organochloride</a> insecticides. Scientists have researched ways to use this enzyme to break down pesticides in the environment, which would detoxify them and prevent harmful environmental effects. A similar enzyme produced by soil bacteria that also breaks down organochlorides works faster and remains stable in a variety of conditions.<a class="footnote-ref" id="fnref:48" href="#fn:48"><sup>48</sup></a> </p><p>Resistance to <a href="/facts/Gene_drive/wqFg8qFp">gene drive</a> forms of population control is expected to occur and methods of slowing its development are being studied.<a class="footnote-ref" id="fnref:49" href="#fn:49"><sup>49</sup></a> </p><p>The molecular mechanisms of insecticide resistance only became comprehensible in 1997. Guerrero et al. 1997 used the newest methods of the time to <a href="/facts/Molecular_evolution/lmMbqfzH">find mutations</a> producing pyrethroid resistance in dipterans. Even so, <a href="/facts/Genetic_adaptation/5K2gNpDB">these adaptations</a> to pesticides were unusually rapid and may not necessarily represent the norm in wild populations, under wild conditions. Natural adaptation processes take much longer and almost always happen in response to gentler pressures.<a class="footnote-ref" id="fnref:50" href="#fn:50"><sup>50</sup></a> </p> <h2 id="management">Management</h2> <p>In order to remediate the problem it first must be ascertained what is really wrong. Assaying of suspected pesticide resistance - and not merely field observation and experience - is necessary because it may be mistaken for failure to <a href="/facts/Pesticide_application/xuTAo6qu">apply</a> the pesticide as directed, or <a href="/facts/Biodegradation/d1UW4dfR">microbial degradation</a> of the pesticide.<a class="footnote-ref" id="fnref:51" href="#fn:51"><sup>51</sup></a> </p><p>The <a href="/facts/United_Nations/fgXLnmgT">United Nations</a>' <a href="/facts/World_Health_Organization/YNN3bgug">World Health Organization</a> established the Worldwide Insecticide resistance Network in March 2016,<a class="footnote-ref" id="fnref:52" href="#fn:52"><sup>52</sup></a><a class="footnote-ref" id="fnref:53" href="#fn:53"><sup>53</sup></a><a class="footnote-ref" id="fnref:54" href="#fn:54"><sup>54</sup></a><a class="footnote-ref" id="fnref:55" href="#fn:55"><sup>55</sup></a> due to increasing need and increasing recognition, including the radical decline in function against <a href="/facts/Pest_(organism)/mXGHJ8s7">pests</a> of vegetables.<a class="footnote-ref" id="fnref:56" href="#fn:56"><sup>56</sup></a><a class="footnote-ref" id="fnref:57" href="#fn:57"><sup>57</sup></a><a class="footnote-ref" id="fnref:58" href="#fn:58"><sup>58</sup></a><a class="footnote-ref" id="fnref:59" href="#fn:59"><sup>59</sup></a> </p> <h3>Integrated pest management</h3> <p class="note">Main article: <a href="/facts/Integrated_pest_management/XWCwBShW">Integrated pest management</a></p><p>The <a href="/facts/Integrated_pest_management/XWCwBShW">Integrated pest management (IPM)</a> approach provides a balanced approach to minimizing resistance. </p><p>Resistance can be managed by reducing use of a pesticide: which may also be beneficial for mitigating pest <a href="/facts/Resurgence_(pest)/BIX7ejcX">resurgence</a>. This allows non-resistant organisms to out-compete resistant strains. They can later be killed by returning to use of the pesticide. </p><p>A complementary approach is to site untreated refuges near treated croplands where susceptible pests can survive.<a class="footnote-ref" id="fnref:60" href="#fn:60"><sup>60</sup></a><a class="footnote-ref" id="fnref:61" href="#fn:61"><sup>61</sup></a> </p><p>When pesticides are the sole or predominant method of pest control, resistance is commonly managed through pesticide rotation. This involves switching among pesticide classes with different modes of action to delay or mitigate pest resistance.<a class="footnote-ref" id="fnref:62" href="#fn:62"><sup>62</sup></a> The Resistance Action Committees monitor resistance across the world, and in order to do that, each maintains a list of modes of action and pesticides that fall into those categories: the <a href="/facts/Fungicide_Resistance_Action_Committee/c1twQBYo">Fungicide Resistance Action Committee</a>,<a class="footnote-ref" id="fnref:63" href="#fn:63"><sup>63</sup></a> the <a href="/facts/Weed_Science_Society_of_America/06nryRfT">Weed Science Society of America</a><a class="footnote-ref" id="fnref:64" href="#fn:64"><sup>64</sup></a><a class="footnote-ref" id="fnref:65" href="#fn:65"><sup>65</sup></a> (the <a href="/facts/Herbicide_Resistance_Action_Committee/8tPNjX3L">Herbicide Resistance Action Committee</a> no longer has its own scheme, and is contributing to WSSA's from now on),<a class="footnote-ref" id="fnref:66" href="#fn:66"><sup>66</sup></a> and the <a href="/facts/Insecticide_Resistance_Action_Committee/j72wrfn1">Insecticide Resistance Action Committee</a>.<a class="footnote-ref" id="fnref:67" href="#fn:67"><sup>67</sup></a> The <a href="/facts/U.S._Environmental_Protection_Agency/ghI985SI">U.S. Environmental Protection Agency</a> (EPA) also uses those classification schemes.<a class="footnote-ref" id="fnref:68" href="#fn:68"><sup>68</sup></a> </p><p>Manufacturers may recommend no more than a specified number of consecutive applications of a pesticide class be made before moving to a different pesticide class.<a class="footnote-ref" id="fnref:69" href="#fn:69"><sup>69</sup></a> </p><p>Two or more pesticides with different modes of action can be tankmixed on the farm to improve results and delay or mitigate existing pest resistance.<a class="footnote-ref" id="fnref:70" href="#fn:70"><sup>70</sup></a> </p> <h2 id="status">Status</h2> <h3>Glyphosate</h3> <p><a href="/facts/Glyphosate/dS72T7VY">Glyphosate</a>-resistant weeds are now present in the vast majority of <a href="/facts/Soybean/reNwxvo2">soybean</a>, <a href="/facts/Cotton/efXRcjbn">cotton</a>, and <a href="/facts/Maize/lJ6c5xMH">corn</a> farms in some U.S. states. Weeds resistant to multiple herbicide modes of action are also on the rise.<a class="footnote-ref" id="fnref:71" href="#fn:71"><sup>71</sup></a> </p><p>Before glyphosate, most herbicides would kill a limited number of weed species, forcing farmers to continually <a href="/facts/Crop_rotation/yeqbveKE">rotate their crops</a> and herbicides to prevent resistance. Glyphosate disrupts the ability of most plants to construct new proteins. Glyphosate-tolerant <a href="/facts/Transgenic_crops/vKkn4oVs">transgenic crops</a> are not affected.<a class="footnote-ref" id="fnref:72" href="#fn:72"><sup>72</sup></a> </p><p>A weed family that includes waterhemp (<i><a href="/facts/Amaranthus_rudis/m7fozbgo">Amaranthus rudis</a></i>) has developed glyphosate-resistant strains. A 2008 to 2009 survey of 144 populations of waterhemp in 41 Missouri counties revealed glyphosate resistance in 69%. Weed surveys from some 500 sites throughout Iowa in 2011 and 2012 revealed glyphosate resistance in approximately 64% of waterhemp samples.<a class="footnote-ref" id="fnref:73" href="#fn:73"><sup>73</sup></a> </p><p>In response to the rise in glyphosate resistance, farmers turned to other herbicides—applying several in a single season. In the United States, most midwestern and southern farmers continue to use glyphosate because it still controls most weed species, applying other herbicides, known as residuals, to deal with resistance.<a class="footnote-ref" id="fnref:74" href="#fn:74"><sup>74</sup></a> </p><p>The use of multiple herbicides appears to have slowed the spread of glyphosate resistance. From 2005 through 2010 researchers discovered 13 different weed species that had developed resistance to glyphosate. From 2010 to 2014 only two more were discovered.<a class="footnote-ref" id="fnref:75" href="#fn:75"><sup>75</sup></a> </p><p>A 2013 Missouri survey showed that multiply-resistant weeds had spread. 43% of the sampled weed populations were resistant to two different herbicides, 6% to three and 0.5% to four. In Iowa a survey revealed dual resistance in 89% of waterhemp populations, 25% resistant to three and 10% resistant to five.<a class="footnote-ref" id="fnref:76" href="#fn:76"><sup>76</sup></a> </p><p>Resistance increases pesticide costs. For southern cotton, herbicide costs climbed from between $50–$75 per hectare ($20–$30/acre) a few years ago to about $370 per hectare ($150/acre) in 2014. In the South, resistance contributed to the shift that reduced cotton planting by 70% in Arkansas and 60% in Tennessee. For soybeans in Illinois, costs rose from about $25–$160 per hectare ($10–$65/acre).<a class="footnote-ref" id="fnref:77" href="#fn:77"><sup>77</sup></a> </p> <h3><i>Bacillus thuringiensis</i></h3> <p>During 2009 and 2010, some Iowa fields showed severe injury to corn producing <a href="/facts/Bacillus_thuringiensis/aVv32jHV">Bt</a> toxin <a href="/facts/Cry3Bb1/3c5aB1pg">Cry3Bb1</a> by <a href="/facts/Western_corn_rootworm/S3cRD1uD">western corn rootworm</a>. During 2011, mCry3A corn also displayed insect damage, including <a href="/facts/Cross-resistance/0fWdEAPe">cross-resistance</a> between these toxins. Resistance persisted and spread in Iowa. Bt corn that targets western corn rootworm does not produce a high dose of Bt toxin, and displays less resistance than that seen in a high-dose Bt crop.<a class="footnote-ref" id="fnref:78" href="#fn:78"><sup>78</sup></a> </p><p>Products such as Capture LFR (containing the pyrethroid <a href="/facts/Bifenthrin/Xlnk1M6D">bifenthrin</a>) and SmartChoice (containing a <a href="/facts/Pyrethroid/Lf1N0STQ">pyrethroid</a> and an <a href="/facts/Organophosphate/u4U9GS4z">organophosphate</a>) have been increasingly used to complement Bt crops that farmers find alone to be unable to prevent insect-driven injury. Multiple studies have found the practice to be either ineffective or to accelerate the development of resistant strains.<a class="footnote-ref" id="fnref:79" href="#fn:79"><sup>79</sup></a> </p> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Antibiotic_resistance/jsbAywgx">Antibiotic resistance</a></li> <li><a href="/facts/Male_accessory_gland/bMKAjLjq">Male accessory gland</a></li> <li><a href="/facts/Persistent_organic_pollutant/80UtnJEp">Persistent organic pollutant</a></li> <li><a href="/facts/Stockholm_Convention_on_Persistent_Organic_Pollutants/HQQU41QJ">Stockholm Convention on Persistent Organic Pollutants</a></li> <li><a href="/facts/Vavilovian_mimicry/0czHEycT">Vavilovian mimicry</a></li></ul> <h2 id="further-reading">Further reading</h2> <ul><li>FRAC (<a href="/facts/Fungicide_Resistance_Action_Committee/c1twQBYo">Fungicide Resistance Action Committee</a>). <a href="http://www.frac.info/docs/default-source/publications/statement-on-multisite-fungicides/frac-statement-on-multisite-fungicides-2018.pdf?sfvrsn=3c25489a_2">"Importance of multisite fungicides in managing pathogen resistance"</a> (PDF).</li></ul> <h2 id="external-links">External links</h2> <ul><li><a href="https://web.archive.org/web/20100724001453/http://resistance.potatobeetle.org/resistance.html">Overview of insecticide resistance</a></li> <li><a href="http://www.irac-online.org/resources/guide.asp">IRAC, Insecticide Resistance Action Committee</a></li> <li><a href="https://web.archive.org/web/20120723052103/http://www.frac.info/frac/index.htm">FRAC, Fungicide Resistance Action Committee</a></li> <li><a href="https://web.archive.org/web/20021031073455/http://www.croplife.org/website/pages/RRAC.aspx">RRAC, Rodenticide Resistance Action Committee </a></li> <li><a href="https://web.archive.org/web/20060615165922/http://www.plantprotection.org/HRAC/">HRAC, Herbicide Resistance Action Committee</a></li> <li><a href="http://www.pesticides.gov.uk/rags_home.asp">UK Resistance Action groups</a></li> <li><a href="http://www.pesticideresistance.org">Arthropod Pesticide Resistance Database</a></li> <li><a href="http://resistance.eppo.int/">"Resistance Database"</a>. <i>EPPO (<a href="/facts/European_and_Mediterranean_Plant_Protection_Organization/KH8AFYjI">European and Mediterranean Plant Protection Organization</a>)</i>. Retrieved 2021-09-24.</li> <li>EPPO's efficacy testing site: <a href="http://pp1.eppo.int/">"EPPO database on PP1 Standards"</a>. <i>EPPO (<a href="/facts/European_and_Mediterranean_Plant_Protection_Organization/KH8AFYjI">European and Mediterranean Plant Protection Organization</a>)</i>. Retrieved 2021-12-02.</li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>PBS (2001), Pesticide resistance. Retrieved on September 15, 2007. <a href="https://www.pbs.org/wgbh/evolution/library/10/1/l_101_02.html" target="_blank">https://www.pbs.org/wgbh/evolution/library/10/1/l_101_02.html</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Guedes, R.N.C.; Smagghe, G.; Stark, J.D.; Desneux, N. (2016-03-11). "Pesticide-Induced Stress in Arthropod Pests for Optimized Integrated Pest Management Programs". Annual Review of Entomology. 61 (1). Annual Reviews: 43–62. doi:10.1146/annurev-ento-010715-023646. ISSN 0066-4170. PMID 26473315. 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