Acute toxicity and sublethal effects of methoxyfenozide and thiodicarb on survival, development and reproduction of Helicoverpa armigera (Lepidoptera: Noctuidae)

Saber, Moosa; Parsaeyan, Ehsan; Vojoudi, Samad; Bagheri, Mohammad; Mehrvar, Ali; Kamita, Shizuo G.

doi:10.1016/j.cropro.2012.09.011

Cited by 39 publications

(20 citation statements)

References 20 publications

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“…The reduction in the survival of C. includens, reconciled with the increase in the time of development, the reduction in the fertility and fecundity of the adults; may increase population doubling time and subsequently lead to lower population growth [6]. These findings are important because the insect-pest population may require a longer period of time to reach the level of control.…”

Section: Discussionmentioning

confidence: 91%

“…Since control failures during management [8] may result in exposure of the pest to sublethal doses [7]. In addition, insects that survive after toxic exposure to an insecticide may present changes in biological, reproductive, behavioral and physiological parameters [6] [9].…”

Section: Introductionmentioning

confidence: 99%

“…Among the commonly used insecticides, there is an obstacle due to two aspects: resistant, and the lack of knowledge about the lethal and sublethal effects of insecticides on the pest [6] [7].…”

Section: Introductionmentioning

confidence: 99%

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Sublethal Doses of Insecticides Affect the Fecundity and Fertility of the <i>Chrysodeixis includens</i>?

Rodrigues¹,

Silva²,

Rodrigues³

et al. 2018

AJPS

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The objective was to determine lethal concentrations and to evaluate the effects of sublethal doses of insecticides on Chrysodeixis includens under laboratory conditions. The standard population of C. includens was kept on artificial diet under controlled conditions (25˚C ± 5˚C, 60% ± 10 RU, 12:12 h). The active principles used were B. thuringiensis, Indoxacarb and Teflubenzuron.The CL 25 and LC 50 obtained from dose response curve (estimated from eight concentrations of each active principle) were diluted in water and applied to the back of third instar caterpillars and compared to the control (water). The insecticides used showed lethal and sublethal effects in C. includens. Bacillus thuringiensis was 6.21 and 2.79 times more toxic to soybean looper when compared to the products Indoxacarb and Teflubenzuron, respectively. Insecticides applied to the caterpillars reduced survival and affected the biomass gain with increased larvae and pupae longevity, with a significant reduction in fertility (40%) and fecundity (94.97%) in adults. In the present study it was observed that both survival and larval biomass gain have a direct effect on fecundity and fertility, respectively. Therefore the active ingredients Indoxacarb, Teflubenzuron and B. thuringiensis can be used in rotation as a tool in the C. includens.

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Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Sublethal Doses of Insecticides Affect the Fecundity and Fertility of the <i>Chrysodeixis includens</i>?

Rodrigues¹,

Silva²,

Rodrigues³

et al. 2018

AJPS

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“…According to Saber et al (2013), it has been found that the LC 30 doses of methoxyfenozide and thiodicarb against H. armigera were 148 and 550 mg/ml, respectively, and when larvae were treated with the LC 30 concentration, 32 and 20% of mortality was recorded. The acute toxicity test of imidacloprid revealed that its LC 50 value was fairly low (88.60 mg/l).…”

Section: Discussionmentioning

confidence: 99%

“…The successful application of insecticides in a sustainable management programme of H. armigera requires careful assessment of the efficiency of the available insecticidal compounds (Saber et al, 2013). Imidacloprid is a neonicotinoid that acts on the central nervous system of insects and has low mammalian toxicity.…”

Section: Introductionmentioning

confidence: 99%

Acute toxicity and sublethal effects of the neonicotinoid imidacloprid on the fitness of Helicoverpa armigera (Lepidoptera: Noctuidae)

Ahmad

Ansari

Ahmad

2013

Int. J. Trop. Insect Sci.

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The fitness of Helicoverpa armigera (Hü bner) was determined using demographic studies on the F 1 generation that survived after exposure to four sublethal doses (LC 50 , LC 30 , LC 20 and LC 10 ) of imidacloprid. The effects were assessed on the surviving individuals emerged from sixth-instar larvae that had ingested imidacloprid-treated chickpea pods. Age-specific parameters were found to be highest with the commencement of age and gradually decreased with the progression of age in both the treated and nontreated groups. Survivorship was reduced to 37 days after exposure to the sublethal dose of LC 50 when compared with 42 days in groups not exposed to the insecticide. The highest number (17%) of unhatched eggs was recorded in insects treated with the LC 50 dose of imidacloprid, whereas 98% of the eggs hatched in the unexposed group. The potential fecundity of the F 1 generation females was reduced to 330 eggs/female/generation when treated with the LC 50 dose compared with that of the unexposed females. The intrinsic rate of increase was found to be least in insects exposed to the LC 20 dose (0.0355 females/ female/day) and highest (0.0470) in the unexposed group. It took 38.83 days for H. armigera to complete one generation in the unexposed population, while this was reduced to 33.94 days after exposure to the sublethal dose of LC 50 . The longevity of adults decreased when the larvae were exposed to the sublethal dose of imidacloprid. The developmental time of pre-pupae and pupae significantly decreased and was least when exposed to the highest sublethal dose of the insecticide. Thus, at sublethal doses, imidacloprid caused a significant reduction in the survival and fecundity as well as increased mortality of H. armigera in the subsequent generation after exposure to the insecticide. In conclusion, imidacloprid can be successfully incorporated into integrated pest management of H. armigera.

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Sublethal effects of chlorfenapyr on Plutella xylostella (Lepidoptera: Plutellidae)

Jia

Zhang

Hong

et al. 2022

Pest Management Science

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BACKGROUND: The diamondback moth (DBM), Plutella xylostella (L.), is the most destructive pest of cruciferous vegetables worldwide. Chlorfenapyr is an important insecticide for controlling DBM. The impacts of three sublethal doses (LC 1 , LC 10 and LC 30 ) of chlorfenapyr on the chlorfenapyr-exposed DBM individuals and their unexposed F 1 and F 2 offspring were investigated in order to reveal the non-lethal deleterious effects of chlorfenapyr and its potential hormetic effects.RESULTS: LC 1 significantly increased female pupa weight of F 0 and F 1 generations, and F 0 fecundity as well as F 1 gross reproduction rate (GRR). The LC 1 -elicited rise in emergency rate and fecundity was significantly greater in F 0 than in F 1 . By contrast, LC 30 significantly decreased age-specific survival rates, pupation rate, male pupal weight, emergence rate and fecundity of F 0 and F 1 generations as well as female adult proportion and GRR, net reproduction rate (R 0 ), intrinsic rate of increase (r m ) and finite rate of increase (⊗) of F 1 generation. The LC 30 -induced reductions in pupation rate, adult emergence rate, male and female pupa weight, and fecundity were greater in F 1 than in F 0 . While LC 10 elicited only a mild inhibition (extension of pupal duration) in F 0 , it yielded both deleterious (drops in female proportion and age-specific survivals) and hormetic effects (ups in male longevity and female fecundity) in F 1 . CONCLUSION:The results demonstrate that the sublethal effects of chlorfenapyr on DBM vary from inhibition to stimulatory hormesis, depending on the dose and generation.

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Acute toxicity and sublethal effects of methoxyfenozide and thiodicarb on survival, development and reproduction of Helicoverpa armigera (Lepidoptera: Noctuidae)

Cited by 39 publications

References 20 publications

Sublethal Doses of Insecticides Affect the Fecundity and Fertility of the <i>Chrysodeixis includens</i>?

Sublethal Doses of Insecticides Affect the Fecundity and Fertility of the <i>Chrysodeixis includens</i>?

Acute toxicity and sublethal effects of the neonicotinoid imidacloprid on the fitness of Helicoverpa armigera (Lepidoptera: Noctuidae)

Sublethal effects of chlorfenapyr on Plutella xylostella (Lepidoptera: Plutellidae)

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Acute toxicity and sublethal effects of methoxyfenozide and thiodicarb on survival, development and reproduction of Helicoverpa armigera (Lepidoptera: Noctuidae)

Cited by 39 publications

References 20 publications

Sublethal Doses of Insecticides Affect the Fecundity and Fertility of the &lt;i&gt;Chrysodeixis includens&lt;/i&gt;?

Sublethal Doses of Insecticides Affect the Fecundity and Fertility of the &lt;i&gt;Chrysodeixis includens&lt;/i&gt;?

Acute toxicity and sublethal effects of the neonicotinoid imidacloprid on the fitness of Helicoverpa armigera (Lepidoptera: Noctuidae)

Sublethal effects of chlorfenapyr on Plutella xylostella (Lepidoptera: Plutellidae)

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Sublethal Doses of Insecticides Affect the Fecundity and Fertility of the <i>Chrysodeixis includens</i>?

Sublethal Doses of Insecticides Affect the Fecundity and Fertility of the <i>Chrysodeixis includens</i>?