Effect of Insecticides on the Diamondback Moth (Lepidoptera: Plutellidae) and Its Parasitoid &lt;I&gt;Diadegma insulare&lt;/I&gt; (Hymenoptera: Ichneumonidae)

Hill, Travis A.; Foster, R. E.

doi:10.1603/0022-0493-93.3.763

Cited by 76 publications

(39 citation statements)

References 11 publications

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“…* As médias seguidas pela mesma letra minúsculas na linha (para comparação entre dose e subdose de cada inseticida para cada espécie), maiúsculas na coluna (para comparação da seletividade dos inseticidas dentro de uma mesma concentração) ou minúsculas e em itálico na linha (para comparação entre tolerância das espécies à uma mesma concentração de cada inseticida), não diferem, entre si, pelo teste de Scott -Knott, a P < 0,05. crisântemo. Já Bacci et al (2002) Metamidofós 600 CE 100,00 0,00 aAa 100,00 0,00 aAa 100,00 0,00 aAa 100,00 0,00 aAa 100,00 0,00 aAa 100,00 0,00 aAa Paratiom metílico 600 CE 100,00 0,00 aAa 100,00 0,00 aAa 100,00 0,00 aAa 100,00 0,00 aAa 100,00 0,00 aAa 100,00 0,00 aAa Carbaril 850 PM 100,00 0,00 aAa 100,00 0,00 aAa 100,00 0,00 aAa (HILL & FOSTER, 2000).…”

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Seletividade fisiológica de inseticidas aos inimigos naturais de Plutella xylostella (L.) (Lepidoptera: Plutellidae) em brássicas

et al. 2009

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RESUMOA conservação de inimigos naturais é um componente fundamental no manejo integrado de pragas. Neste trabalho, estudouse a seletividade de sete inseticidas usados no manejo de Plutella xylostella (L. Termos para indexação: Traça-das-crucíferas, Oomyzus sokolowskii, Discodon sp., Lasiochilus sp., controle químico.) ABSTRACTThe conservation of natural enemies is a fundamental component in the integrated pest management. In this work, one studied the selectivity of seven insecticides, used in the management of Plutella xylostella (L.) (Lepidoptera: Plutellidae), to the parasitoid Oomyzus sokolowskii (Kurdjumov) (Hymenoptera: Eulophidae), and to the predators Discodon sp. (Coleoptera: Cantharidae) and Lasiochilus sp. (Hemiptera: Anthocoridae). The organophosphates methamidophos and methyl parathion, and the carbamate carbaryl showed high toxicity to the three natural enemies studied. Dimethoate showed selectivity in favor of Discodon sp. in the dose and sub-dose. The insecticide acephate showed a high impact on Discodon sp. at the time of the application, and its effect was reduced with half of the concentration of the active ingredient. Deltamethrin showed selectivity to O. sokolowskii in both dosages. Permethrin was selective to Lasiochilus sp. only in the sub-dose. Discodon sp. was more tolerant to the dose and sub-dose of dimethoate and to the sub-dose of acephate than O. sokolowskii and Lasiochilus sp. The predator Lasiochilus sp. was more tolerant to the dose and subdose of permethrin than O. sokolowskii and Discodon sp. The parasitoid O. sokolowskii was more tolerant to the dose and sub-dose of deltamethrin than Lasiochilus sp. and Discodon sp. The results of this research were obtained in conditions of extreme exposition. Thus, the results indicate that it is probable that the selective insecticides will not be harmful to the natural enemies in the field.

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Seletividade fisiológica de inseticidas aos inimigos naturais de Plutella xylostella (L.) (Lepidoptera: Plutellidae) em brássicas

et al. 2009

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“…Cordero et al (2007) observed Ϸ80% mortality of D. insulare after 24 h at the Þeld-use rates of spinosad. Hill and Foster (2000) reported spinosad caused 100% mortality of D. insulare 8 h after treatment under laboratory conditions. However, in a follow-up study, parasitism of P. xylostella larvae was not affected by spinosad application under Þeld conditions (Hill and Foster 2003).…”

Section: Discussionmentioning

confidence: 95%

Effect of Insecticides and Plutella xylostella (Lepidoptera: Plutellidae) Genotype on a Predator and Parasitoid and Implications for the Evolution of Insecticide Resistance

Liu

Chen

Collins³

et al. 2012

jnl. econ. entom.

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In the laboratory and in cages in the greenhouse, we evaluated the toxicity of two insecticides (lambda-cyhalothrin and spinosad) on the parasitoid, Diadegma insulare (Cresson), and the predator, Coleomegilla maculate (DeGeer), both natural enemies of the diamondback moth, Plutella xylostella (L.). Lambda-cyhalothrin was very toxic to both natural enemies. Spinosad was less toxic to C. maculata adults and larvae, and slightly toxic to D. insulare. Both natural enemies suppressed P. xylostella populations in cages with 80% spinosad-treated and 20% nontreated plants; such suppression was not seen when lambda-cyhalothrin was used. Using broccoli, Brassica oleracea L. variety italica, a common host for P. xylostella, we also studied direct and indirect effects of both natural enemies in the presence and absence of the two insecticides and to different P. xylostella genotypes: resistant to the insecticide, susceptible, or heterozygous. Neither natural enemy could distinguish host genotype if P. xylostella were feeding on nontreated plants. They could also not distinguish between larvae feeding on spinosad-treated plants and nontreated plants, but D. insulare could distinguish between larvae feeding on lambda-cyhalothrin treated and nontreated plants. Our studies suggest that lambda-cyhalothrin has direct toxicity to these two natural enemies, can affect their host foraging and acceptance of P. xylostella and consequently would not be compatible in conserving these natural enemies in a program for suppression of P. xylostella. In contrast, our studies suggest that treatment with spinosad has much less effect on these natural enemies and would allow them to help suppress populations of P. xylostella. These Þndings are discussed in relation to the evolution of insecticide resistance and suppression of the pest populations.

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“…Their results indicated that Cry1C Bt broccoli plants and the puriÞed Cry1C toxin had no direct toxicity to D. insulare. Chen et al (2008) and Hill and Foster (2000) observed no survival of adult parasitoids directly treated with spinosad. Chen et al (2008) observed no survival of adult parasitoids directly treated with lambda-cyhalothrin.…”

Section: Methodsmentioning

confidence: 97%

Modeling the Integration of Parasitoid, Insecticide, and Transgenic Insecticidal Crop for the Long-Term Control of an Insect Pest

et al. 2013

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The tools of insect pest management include host plant resistance, biological control, and insecticides and how they are integrated will inßuence the durability of each. We created a detailed model of the population dynamics and population genetics of the diamondback moth, Plutella xylostella L., and its parasitoid, Diadegma insulare (Cresson), to study long-term pest management in broccoli Brassica oleracea L. Given this pestÕs history of evolving resistance to various toxins, we also evaluated the evolution of resistance to transgenic insecticidal Bt broccoli (expressing Cry1Ac) and two types of insecticides. Simulations demonstrated that parasitism provided the most reliable, long-term control of P. xylostella populations. Use of Bt broccoli with a 10% insecticide-free refuge did not reduce the long-term contribution of parasitism to pest control. Small refuges within Bt broccoli Þelds can delay evolution of resistance Ͼ30 generations if resistance alleles are rare in the pest population. However, the effectiveness of these refuges can be compromised by insecticide use. Rainfall mortality during the pestÕs egg and neonate stages signiÞcantly inßuences pest control but especially resistance management. Our model results support the idea that Bt crops and biological control can be integrated in integrated pest management and actually synergistically support each other. However, the planting and maintenance of toxin-free refuges are critical to this integration.

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Effect of Insecticides on the Diamondback Moth (Lepidoptera: Plutellidae) and Its Parasitoid <I>Diadegma insulare</I> (Hymenoptera: Ichneumonidae)

Cited by 76 publications

References 11 publications

Seletividade fisiológica de inseticidas aos inimigos naturais de Plutella xylostella (L.) (Lepidoptera: Plutellidae) em brássicas

Seletividade fisiológica de inseticidas aos inimigos naturais de Plutella xylostella (L.) (Lepidoptera: Plutellidae) em brássicas

Effect of Insecticides and Plutella xylostella (Lepidoptera: Plutellidae) Genotype on a Predator and Parasitoid and Implications for the Evolution of Insecticide Resistance

Modeling the Integration of Parasitoid, Insecticide, and Transgenic Insecticidal Crop for the Long-Term Control of an Insect Pest

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