Egg hatch inhibition in the Cotton Leafworm with certain IGRs and synthetic pyrethroids

Assal, O. M.; Radwan, H. S. A.; Samy, M. E.

doi:10.1111/j.1439-0418.1983.tb02641.x

Cited by 7 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This suggests that the effect of insecticides on egg hatch also depends on the age of the eggs; the younger the eggs, the more effective the insecticide. High ovicidal effect of novaluron on other lepidopteran has been reported in other studies (Assal et al, 1983;Chockalingam & Noorjahan, 1984).…”

Section: Effect Of Insecticides On Hatch Of Black-head Stage Egg Massessupporting

confidence: 64%

Susceptibility of Chilo partellus Swinhoe, 1885 (Lepidoptera: Crambidae) to some commonly used insecticides

Achiri

Atakan

Pehlivan

2020

Turkish Journal of Entomology

View full text Add to dashboard Cite

Chilo partellus Swinhoe, 1885 (Lepidoptera: Crambidae), a destructive pest of maize, was recently recorded in the Mediterranean Region of Turkey. The pest is considered to be an invasive species, displacing indigenous stem borers in many parts of the world. The aim of the study was to determine the effect of commonly used insecticides in a maize production system in Turkey on egg hatch and mortality of first instar larvae of C. partellus under laboratory conditions (27±2ºC, 70% RH and 14:10 h L:D photoperiod) at the Plant Protection Department, Faculty of Agriculture, University of Çukurova. Eight insecticides registered for indigenous lepidopteran pests were used at the recommended rates. The percentage of hatched egg masses were significantly different. The smallest percentage was 30.6% with deltamethrin. The percentages of hatched egg masses were greater than 80% for all other insecticides. Mortality of hatched larvae was significantly different. The highest and lowest mortalities of hatched larvae were 84.5% and 38.2% with emamectin-benzoate and lambda-cyhalothrin, respectively. Seventy-two h after exposure of the first instar larvae to sprayed maize leaf disks, the lowest and highest mortalities were 62.6% and 96.7% with indoxacarb and emamectinbenzoate, respectively. Survival analyses revealed that hazard ratios ranged from 4.91 (95% CI: 1.66-14.6) to 15.6 (95% CI: 5.33-45.6) with chlorpyrifos-ethyl and emamectin-benzoate, respectively. The mortality of first instar larvae was about 16, 10 and 9 times that of the control with emamectin-benzoate, lambda-cyhalothrin and deltamethrin, respectively. Feeding activity of larval stage was reduced by all treatments. The implications of this study are discussed.

show abstract

Section: Effect Of Insecticides On Hatch Of Black-head Stage Egg Massessupporting

confidence: 64%

Susceptibility of Chilo partellus Swinhoe, 1885 (Lepidoptera: Crambidae) to some commonly used insecticides

Achiri

Atakan

Pehlivan

2020

Turkish Journal of Entomology

View full text Add to dashboard Cite

show abstract

“…Similarly, another chitin synthesis inhibitor diflubenzuron was highly toxic to the recently laid eggs of several insect species, but had little or no effect on more mature eggs (Grosscurt 1978;Assal et al 1983;Chockalingam and Noorjahan 1984;Charmillot et al 2001). In contrast, novaluron significantly reduced viability of the European corn borer, Ostrinia nubilalis (Hubner) eggs that were close to hatching (Boiteau and Noronha 2007), but had no effect on the 0-24 h old eggs of the red flour beetle, Tribolium castaneum (Herbst) (Kostyukovsky and Trostanetsky 2006).…”

Section: Discussionmentioning

confidence: 91%

Maturity-Dependent Mortality of Colorado Potato Beetle Eggs Treated with Novaluron

Alyokhin

Choban²

2010

Am. J. Pot Res

View full text Add to dashboard Cite

Novaluron is a chitin synthesis inhibitor (a benzoylphenyl urea) that kills larval stages and causes reversible cessation of laying viable eggs in adults of the Colorado potato beetle, Leptinotarsa decemlineata (Say). Previous studies also suggest that it has ovicidal properties, but not on all tested egg masses. We investigated if egg maturity at the time of exposure affects its susceptibility to novaluron. Novaluron application significantly reduced the hatch of eggs that were 0-24 h old at the moment of treatment, but had no effect on the eggs that were 96-120 h old. Novaluron also interfered with the development of the hatched larvae regardless of the egg age at the time of treatment, probably due to chorion feeding by neonates. Ovicidal properties of novaluron may contribute to Colorado potato beetle control, but their effect will be limited to newly laid eggs. If that window of susceptibility is missed, hatching larvae will be exposed to a fairly old novaluron residue that might be weathered down to sublethal levels. This supports the current recommendations to apply novaluron as a larvicide.Resumen Novaluron es un inhibidor de la síntesis de quitina (un benzoylphenyl urea) que mata estados larvales y causa cese reversible de la deposición de huevos viables en adultos del escarabajo de Colorado, Leptinotarsa decemlineata (Say). Estudios previos también sugieren que tiene propiedades ovicidas, pero no en todas las masas de huevos probadas. Investigamos si la madurez del huevo al tiempo de la exposición afecta su susceptibilidad al novaluron. Su aplicación redujo significativamente la eclosión de los huevos de 0 a 24 hs de edad al momento del tratamiento, pero no tuvo efecto en los de 96 a 120 hs de edad. Novaluron también interfirió con el desarrollo de la larva emergida, independientemente de la edad del huevo al momento del tratamiento, probablemente debido a la ingestión de la cubierta externa del huevo por los neonatos. Las propiedades ovicidas de novaluron pueden contribuir al control del escarabajo de Colorado, pero su efecto estará limitado a la oviposición nueva. Si se pierde esa ventana de susceptibilidad, la larva resultante estará expuesta a un residuo de novaluron bastante viejo que pudiera ser disminuido a niveles subletales por el ambiente. Esto respalda las recomendaciones actuales de aplicar novaluron como un larvicida.

show abstract

“…The ovilarvicidal properties of the three insecticides remain poorly defined. Novaluron can have a direct effect on egg hatching in some insects, including Lepidoptera,20, 21 but does not reduce hatching of Tribolium castaneum (Herbst.) 12.…”

Section: Discussionmentioning

confidence: 99%

Topical, residual and ovicidal contact toxicity of three reduced‐risk insecticides against the European corn borer, Ostrinia nubilalis (Lepidoptera: Crambidae), on potato

Boiteau

Noronha

2007

Pest Management Science

View full text Add to dashboard Cite

show abstract

Egg hatch inhibition in the Cotton Leafworm with certain IGRs and synthetic pyrethroids

Cited by 7 publications

References 13 publications

Susceptibility of Chilo partellus Swinhoe, 1885 (Lepidoptera: Crambidae) to some commonly used insecticides

Susceptibility of Chilo partellus Swinhoe, 1885 (Lepidoptera: Crambidae) to some commonly used insecticides

Maturity-Dependent Mortality of Colorado Potato Beetle Eggs Treated with Novaluron

Topical, residual and ovicidal contact toxicity of three reduced‐risk insecticides against the European corn borer, Ostrinia nubilalis (Lepidoptera: Crambidae), on potato

Contact Info

Product

Resources

About