Organic products selectivity for Trichogramma pretiosum (Hymenoptera: Trichogrammatidae)

Silva, Débora Mello da; Bueno, Adeney de Freitas

doi:10.1590/1808-1657000422013

Cited by 9 publications

(5 citation statements)

References 30 publications

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“…The reasons behind the higher mortality of E. formosa male-adults than its female-adults has not been investigated in the present study. Azadirachtin-A, azadirachtin-B, nimbina and salamina at 9.6 ppm were in general safe (Class-1) to both adults and pupae of Trichogramma pretiosum 71 . These botanicals did not affect T. pretiosum and proved highly compatible with this parasitoid.…”

Section: Discussionmentioning

confidence: 92%

Efficacy of biorational insecticides against Bemisia tabaci (Genn.) and their selectivity for its parasitoid Encarsia formosa Gahan on Bt cotton

Gogi

Syed

Atta³

et al. 2021

Sci Rep

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The toxicity of seven biorational insecticides [five insect growth regulators (Buprofezin, Fenoxycarb, Pyriproxyfen, Methoxyfenozide, and Tebufenozide) and two oil-extracts of neem and bitter gourd seeds] against Bemisia tabaci and their selectivity for its parasitoid, Encarsia formosa were evaluated in laboratory and field conditions for 2 years (2018–2019) in Pakistan. Toxicity results demonstrate that Pyriproxyfen, Buprofezin, and Fenoxycarb proved to be effective (80–91% mortality and 66.3–84.2% population-reduction) against B. tabaci followed by Methoxyfenozide, Tebufenozide (50–75% mortality and 47.8–52.4% population-reduction), and then oil-extracts of neem and bitter gourd (25–50% mortality and 36.5–39.8% population-reduction) in the laboratory [72 h post-application exposure interval (PAEI)] and field trails (168 h PAEI), respectively. All tested biorationals, except Methoxyfenozide [(slightly-harmful/Class-II), i.e., causing mortality of parasitoids between a range of 25–50%] and Tebufenozide [(moderately-harmful/Class-III), i.e., causing mortality of parasitoids between the ranges of 51–75%], proved harmless/Class-I biorationals at PAEI of 7-days in the field (parasitism-reduction < 25%) and 3-days in the lab (effect < 30%). In laboratory bioassays, exposure of parasitized-pseudopupae and adult-parasitoids to neem and bitter gourd oils demonstrated that these compounds proved harmless/Class-I biorationals (< 30% mortality). Alternatively, Pyriproxyfen, Buprofezin, Fenoxycarb, Methoxyfenozide, and Tebufenozide were slightly-harmful biorationals (30–79% mortality) against the respective stages of E. formosa. We conclude that most of the tested biorationals proved harmless or slightly harmful to E. formosa, except tebufenozide after PAEI of 7-days (168 h) in the field and, therefore, may be used strategically in Integrated Pest Management (IPM) of B. tabaci.

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Section: Discussionmentioning

confidence: 92%

Efficacy of biorational insecticides against Bemisia tabaci (Genn.) and their selectivity for its parasitoid Encarsia formosa Gahan on Bt cotton

Gogi

Syed

Atta³

et al. 2021

Sci Rep

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“…The main market niche of plant essential oils is the organic food production (Isman et al 2011), and these products are an economically viable alternative for small farmers to control pests (Mkenda et al 2015). However, the use of non-selective natural products, authorized in these cropping systems, may not be compatible with biological control agents (Silva and Bueno, 2015), as well as most essential oils used here that were not selective for T. galloi immatures. In addition, the possible phytotoxic effects on the crop(s) of interest should also be evaluated, because for example, P. nigrum did not cause damage on T. galloi immatures, but there is evidence that sarmentine from Piper species has potential bioherbicidal effects (Dayan et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Essential oils cause detrimental effects on biological parameters of Trichogramma galloi immatures

et al. 2017

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Essential oils from botanical extracts used for insect pest control should be both effective and have low impact on natural enemies. The objective was to evaluate the effects of ten essential oils on the biological and reproductive parameters in two Trichogramma galloi Zucchi (Hymenoptera: Trichogrammatidae) generations. The emergence F 1 generation of T. galloi was reduced by more than 30% with Allium sativum, Carapa guianensis, Citrus sinensis, Neem and Syzygium aromaticum. Zingiber officinale reduced the T. galloi emergence of the F 1 and F 2 generations by between 30 and 99%. The longevity of the F 1 generation was reduced by more than 50% with Z. officinale at the pre-pupae and pupae stages. All oils reduced the parasitism rate of the F 1 generation in the egg-larva and pre-pupa stages. Allium sativum, C. guianensis and C. sinensis, Neem and Origanum vulgare reduced parasitism by between 30 and 79%. Zingiber officinale was slightly and moderately harmful to the F 1 and F 2 generations, respectively, for the T. galloi parasitism. The sex ratio of the two T. galloi generations was not affected by the essential oils. The low side effects of the oils on the F 2 generation, except for Z. officinale (the most harmful oil), suggest that T. galloi developed some post-transgenerational tolerance/resistance mechanisms to these oils and/or their components. The A. sativum, C. guianensis, C. sinensis, Neem, O. vulgare, S. aromaticum and Z. officinale oils were not selective for T. galloi. Mentha piperita, Piper nigrum and Thymus vulgaris essential oils can be included in integrated pest management programs for this parasitoid.

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“…The selectivity of this commercial product is due to the high specificity of the insecticide proteins to Lepidoptera, Coleoptera and Diptera, not affecting Hymenoptera egg parasitoids (Praça et al 2004). Adults of T. pretiosum also did not show a parasitism reduction in contact with B. thuringiensis in laboratory, demonstrating the harmlessness of the product to non-target species (Silva & Bueno 2015).…”

Section: Treatmentmentioning

confidence: 94%

“…In addition, pesticides may cause adverse effects to natural enemies, compromising their survival and the biological control of insect pests, requiring greater amounts of pesticides each year to correct the imbalance due to their intensive use (Silva & Bueno 2015).…”

Section: Introductionmentioning

confidence: 99%

Selectivity of pesticides registered for soybean crop on Telenomus podisi and Trissolcus basalis

Zantedeschi

Grützmacher

Pazini

et al. 2018

Pesqui. Agropecu. Trop.

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The use of pesticides in the soybean crop may impair the biological control, if the products are not selective to Telenomus podisi and Trissolcus basalis, which are important stink bug egg parasitoids. This study aimed to assess the selectivity of 15 pesticides registered for soybean crop on adults of T. podisi and T. basalis. Three laboratory bioassays were performed, totaling 18 treatments, in a completely randomized design, with four replications. The insecticides (g or mL of a.i.) imidacloprid + beta-cyfluthrin (0.25 + 0.03), deltamethrin (0.06), thiamethoxam + lambda-cyhalothrin (0.27 + 0.35), acephate (1.87) and fenitrothion (1.25) are harmful to both parasitoids species. Flubendiamide (1.20), diflubenzuron (2.00), Bacillus thuringiensis (0.08) and lufenuron (0.12) are innocuous to both parasitoids. The fungicides azoxystrobin + flutriafol (0.31 + 0.31), trifloxystrobin + prothioconazole (0.37 + 0.44), pyraclostrobin + metconazole (0.33 + 0.12) and trifloxystrobin + cyproconazole (0.94 + 0.40) are innocuous to T. podisi, but slightly harmful to T. basalis. The herbicides glufosinate ammonium salt (0.50) and glyphosate isopropylamine salt (1.20) are innocuous to both parasitoids.

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Organic products selectivity for Trichogramma pretiosum (Hymenoptera: Trichogrammatidae)

Cited by 9 publications

References 30 publications

Efficacy of biorational insecticides against Bemisia tabaci (Genn.) and their selectivity for its parasitoid Encarsia formosa Gahan on Bt cotton

Efficacy of biorational insecticides against Bemisia tabaci (Genn.) and their selectivity for its parasitoid Encarsia formosa Gahan on Bt cotton

Essential oils cause detrimental effects on biological parameters of Trichogramma galloi immatures

Selectivity of pesticides registered for soybean crop on Telenomus podisi and Trissolcus basalis

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