Bio-Efficacy of Neonicotinoids and Insect Growth Regulators against Bemicia tabaci Genn. on Solanum Melongena L.

Saleem, Muhammad; Akbar, Muhammad Faheem

doi:10.17582/journal.pjz/2019.51.5.1615.1620

Cited by 3 publications

(7 citation statements)

References 6 publications

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“…This study also confirms that the tested IGRs proved effective against B. tabaci, causing a significantly higher reduction in its population (36.92-73.21%) up to 168 days (1 week). The observation on population reduction of B. tabaci in the field continued only for 168 h; hence, significant efficacy of IGRs reported for many weeks (2-5 weeks) by researchers 65,66 cannot be discussed. The reduction in the whitefly population in the field up to 72 h PAEI may be attributed to a decrease in fecundity and egg-hatching as well as the mortality of nymphal stages during ecdysis due to IGRs 4,65,66 .…”

Section: Discussionmentioning

confidence: 98%

“…The observation on population reduction of B. tabaci in the field continued only for 168 h; hence, significant efficacy of IGRs reported for many weeks (2-5 weeks) by researchers 65,66 cannot be discussed. The reduction in the whitefly population in the field up to 72 h PAEI may be attributed to a decrease in fecundity and egg-hatching as well as the mortality of nymphal stages during ecdysis due to IGRs 4,65,66 . The reduction in the efficacy of tested IGRs against B. tabaci at 168 days (1 week) in the present field study is attributed to prolonged exposure (168 days) of residues of applied IGRs to adverse field-experimental conditions (> 40 °C, < 55% RH), which result in steady photo-degradation (photolysis) of IGRs residues on the crop.…”

Section: Discussionmentioning

confidence: 98%

“…The results of commercial-scale field studies confirm that IGRs have very slow lethal impacts during the initial few hours of exposure. These lethal effects gradually increase and become significant within 1–3 weeks of post-application intervals because IGRs cause mortality in immature stages of B. tabaci only during ecdysis not before it 4 , 65 , 66 . The lethal effects of IGRs only on ecdysis of B. tabaci immatures are the possible reason behind the higher reduction in pest population during the longer post-exposure interval.…”

Section: Discussionmentioning

confidence: 99%

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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: 98%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

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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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“…As alternate of synthetic broad-spectrum insecticides, two potential chitin synthesis inhibitors were tested against the lepidopteran insect, okra shoot and fruit borer under laboratory condition. It is well reported that insect growth regulators are highly potential against sucking insects like jassids, whiteflies, aphid etc but very limited works has been found on lepidopteran larvae Saleem et al, 2018;Saleem and Akbar, 2019). This study clearlry documented that Award 40 SC (Buprofezin) and Heron 5 EC (Lufenuron) are moderately effective against okra shoot and fruit borer larvae.…”

Section: Discussionmentioning

confidence: 67%

“…Higher animals that do not produce chitin might not be affected by this chemical (Wright, 2010). Several studies have been conducted on the effcet of CSIs on the mortality as well body weight reduction of sucking insects like jassids, whitefly, aphids etc (Gogi et al, 2006;Saleem and Akbar, 2019). But very few studies were done on the effects of CSIs on lepidopteran insect mortality or deformations.…”

Section: Introductionmentioning

confidence: 99%

Insecticidal and Inhibitory Potential of Two Chitin Synthesis Inhibitors, Buprofezin and Lufenuron on Okra Shoot and Fruit Borer, Earias Vittella

Sharmin¹,

Das²

2021

Sust.food.agr.

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In this laboratory study, insecticidal and inhibitory potential of two chitin synthesis inhibitors (CSIs) viz. Buprofezin and Lufenuron were evaluated against okra shoot and fruit borer (OSFB). CSIs were applied on three days old larvae through different bioassay methods like topical or direct, okra-dip or indirect and combined (topical + leaf-dip). Data were collected on larval mortality, weight reduction and deformations of larvae and adults. Results showed that larval mortality and weight reduction were clearly dose, application methods and time dependent. In case of both CSIs, the highest mortality was found @ 1.0 ml/L that was followed by 0.75 ml and 0.50 ml/L respectively. Likewise, the highest body weight reduction was also found from 1.0 ml/L. In both cases, the concentration 0.5 ml/L was found less effective. In case of application methods, combined bioassay method was found superior than that of rest of the two methods. Moreover, a significant percentage of deformed larvae and adults were developed when 3 days old larvae were treated with either Buprofezin or Lufenuron @ 1.0 ml/L through combined bioassay method. The concentration 0.5 ml/L had very less efficacy on the development of deformed larvae or adults. Therefore, based on the laboratory findings Buprofezin and Lufenuron may be the potential component in IPM programmed, rather than their individual application, for controlling okra shoot and fruit borer as well as production of safe okra.

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Biological Degradation of some Synthetic and Bio-Pesticides Sprayed on Cauliflower Crop

Akbar¹,

Haq²,

Ahmad³

et al. 2020

PJZ

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Bio-Efficacy of Neonicotinoids and Insect Growth Regulators against Bemicia tabaci Genn. on Solanum Melongena L.

Cited by 3 publications

References 6 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

Insecticidal and Inhibitory Potential of Two Chitin Synthesis Inhibitors, Buprofezin and Lufenuron on Okra Shoot and Fruit Borer, Earias Vittella

Biological Degradation of some Synthetic and Bio-Pesticides Sprayed on Cauliflower Crop

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