Effect of Dimilin (diflubenzuron) on the fecundity, fertility and progeny development of <i>Dysdercus cingulatus</i> (Hem., Pyrrhocoridae)<sup>1</sup>

Ahmad, Monir

doi:10.1111/j.1439-0418.1992.tb01108.x

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Thus, fecundity was not affeeted. The severe effeets of diflubenzuron on the tested life-table parameters observed with brown laeewings in this study corroborate earlier findings on the effects of diflubenzuron in other insect species (Rup and Chobra 1985, Equbal Ahmad 1992, Kim et al 1992). …”

Section: Resultssupporting

confidence: 92%

Effects of Conventional Insecticides and Insect Growth Regulators on Fecundity and Other Life-Table Parameters of Micromus tasmaniae (Neuroptera: Hemerobiidae)

Rumpf¹,

Frampton²,

Dietrich³

1998

Journal of Economic Entomology

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Effects of 3 conventional insecticides (methyl parathion, azinphos-methyl, cypermethrin) and 3 insect growth regulators (fenoxycarb, diflubenzuron, and tebufenozide) on life-table parameters of Micromus tasmaniae Walker were determined in adults derived from insecticide-treated larvae. The following parameters were compared with the control: sex ratio, longevity, sterility, and fecundity. Power analysis was used to increase the efficiency and the predictability of the life-table test. Diflubenzuron resulted in a higher proportion female lacewings. Longevity was reduced for females emerging from fenoxycarb-and diflubenzurontreated larvae. Total number of eggs was reduced for diflubenzuron-and fenoxycarb-treated lacewings, as weIl as the following generation of tebufenozide-exposed lacewings. Daily number of eggs was reduced for the diflubenzuron treatment. Peak egg production was increased for lacewings exposed to azinphos-methyl and was decreased for the following generation of tebufenozide-exposed lacewings. Diflubenzuron treatment resulted in an extended preoviposition period. Oviposition periods were reduced for lacewings treated with fenoxycarb, diflubenzuron or azinphos-methyl as weIl as for the following generation of the tebufenozide treatment. The time to peak egg production was similar for all treatments. Methyl parathion, cypermethrin, and tebufenozide treatments showed no differences in any of the tested life-table parameters in the 1st generation. In summary, the insect growth regulators fenoxycarb and diflubenzuron had a more severe impact on life-table parameters than the 2 organophosphates and the pyrethroid. In future research, increased attention should be paid to long-term (e.g., the following generation) effects on life-table parameters.

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Section: Resultssupporting

confidence: 92%

Effects of Conventional Insecticides and Insect Growth Regulators on Fecundity and Other Life-Table Parameters of Micromus tasmaniae (Neuroptera: Hemerobiidae)

Rumpf¹,

Frampton²,

Dietrich³

1998

Journal of Economic Entomology

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“…Therefore chlorfluazuron did not prevent oogenesis or deter oviposition by S. oryzae. Most other studies have found that CSIs treatment reduced the numbers of eggs laid (for example, Emam et al, 1988;Ahmed, 1992). However, several coleopteran species fed with CSIs have laid the same or more eggs although fewer eggs hatched compared with untreated coleopterans (Smith & Grigarick, 1989;Becher et al, 1983;Carter, 1975).…”

Section: Effect On Oviposition Immature Development and Mortality Ofmentioning

confidence: 97%

Interaction of treatment of both adult and immature Coleoptera with a chitin synthesis inhibitor affects mortality and development time of their progeny

Elek

1998

Entomologia Exp Applicata

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Chitin synthesis inhibitors, like many other insect growth regulating insecticides, do not kill adult insects but cause mortality of the immature stages. Pre‐exposure of adult stored grain Coleoptera, Rhyzopertha dominica (F.) (Bostrichidae) and Sitophilus oryzae (L.) (Curculionidae) and development of their progeny in grain treated with the chitin synthesis inhibitor, chlorfluazuron, influenced the mortality and development rate of the progeny. Hatch rate of eggs from R. dominica adults that had both developed and laid on wheat treated with 0.75 mg kg−1 chlorfluazuron was reduced by almost 50% compared with untreated eggs, with an LC50 of 0.84 mg kg−1. Eggs laid on treated wheat by R. dominica adults that had been exposed only to treated wheat for 2 weeks before oviposition showed greater reduction in hatch: 75% reduction of normal hatch rate at 0.25 mg kg−1 and almost 100% reduction at 2 mg kg−1 chlorfluazuron, with an LC50 of 0.19 mg kg−1 chlorfluazuron. X‐rays were used to monitor the development and mortality of the immature stages of S. oryzae that developed within the wheat grains. Numbers of eggs laid were not affected by chlorfluazuron treatment. The combination of pre‐exposure of adults and chlorfluazuron concentration had an additive effect on mortality of immature S. oryzae. Pre‐exposure of adults caused most mortality in the first three weeks of development (eggs and larvae), whereas development in treated wheat caused mortality from weeks 3 to 8 (pupae and adults); higher concentrations of chlorfluazuron caused higher mortality. Development in wheat treated with 1 mg kg−1 chlorfluazuron caused 12% corrected overall mortality of progeny while pre‐exposure to the same concentration and development in untreated wheat caused 29% corrected mortality. Pre‐exposure combined with development in wheat treated with 1 mg kg−1 caused 30% corrected mortality. Thus, pre‐exposure of adults appears to have a greater effect on mortality of S. oryzae progeny than development of immature stages in treated grain. Development on treated grain had no effect on development rate. Pre‐exposure of adults did not appear to affect the rate of immature development, as assessed by X‐rays, but did slow the emergence of adults, lengthening development time by about 2 days. This significant, additive effect of pre‐exposure of adults on the mortality of their progeny will enhance the toxicity of chitin synthesis inhibitors such as chlorfluazuron, since most adults receive treatment when the immature stages are treated in crops either before they are harvested or in storage. Assessing the proportion of eggs that hatch from pre‐exposed adults would be a simpler bioassay for CSIs.

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Pest control in German forests: General patterns of biodiversity and possible impacts of Btk, diflubenzuron and lambda-Cyhalothrin on non-target arthropods, birds and bats – a literature review

Brunk¹,

Sobczyk²,

Roth³

2019

jflr

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This review focuses on direct and indirect impacts of three insecticides (Bacillus thuringiensis kurstaki, Diflubenzuron, lambda-Cyhalothrin) on arthropods, bats and birds. General patterns of ecology, diversity, distribution and aspects of nature conservation of these three non-target animal taxa in Germany were examined, as well as their specific exposure and possible direct and indirect effects of the insecticides after application. We conclude, that a) the knowledge of direct and indirect effects of the above mentioned insecticides is still very scarce, b) there is an urgent need for more in detail studies in field in general, especially on indirect effects on vertebrates (including amphibians and reptilians), and for further ecotoxicological laboratory studies especially on sublethal effects on vertebrates.

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Effect of Dimilin (diflubenzuron) on the fecundity, fertility and progeny development of Dysdercus cingulatus (Hem., Pyrrhocoridae)¹

Cited by 3 publications

References 11 publications

Effects of Conventional Insecticides and Insect Growth Regulators on Fecundity and Other Life-Table Parameters of Micromus tasmaniae (Neuroptera: Hemerobiidae)

Effects of Conventional Insecticides and Insect Growth Regulators on Fecundity and Other Life-Table Parameters of Micromus tasmaniae (Neuroptera: Hemerobiidae)

Interaction of treatment of both adult and immature Coleoptera with a chitin synthesis inhibitor affects mortality and development time of their progeny

Pest control in German forests: General patterns of biodiversity and possible impacts of Btk, diflubenzuron and lambda-Cyhalothrin on non-target arthropods, birds and bats – a literature review

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Effect of Dimilin (diflubenzuron) on the fecundity, fertility and progeny development of Dysdercus cingulatus (Hem., Pyrrhocoridae)1

Cited by 3 publications

References 11 publications

Effects of Conventional Insecticides and Insect Growth Regulators on Fecundity and Other Life-Table Parameters of Micromus tasmaniae (Neuroptera: Hemerobiidae)

Effects of Conventional Insecticides and Insect Growth Regulators on Fecundity and Other Life-Table Parameters of Micromus tasmaniae (Neuroptera: Hemerobiidae)

Interaction of treatment of both adult and immature Coleoptera with a chitin synthesis inhibitor affects mortality and development time of their progeny

Pest control in German forests: General patterns of biodiversity and possible impacts of Btk, diflubenzuron and lambda-Cyhalothrin on non-target arthropods, birds and bats – a literature review

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Effect of Dimilin (diflubenzuron) on the fecundity, fertility and progeny development of Dysdercus cingulatus (Hem., Pyrrhocoridae)¹