Effect of Larvae Treated with Mixed Biopesticide Bacillus thuringiensis - Abamectin on Sex Pheromone Communication System in Cotton Bollworm, Helicoverpa armigera

Shen, Lize; Chen, Peng-Zhou; Xu, Zhihong; Deng, Jian‐Yu; Harris, M.A.; Wanna, Ruchuon; Wang, Fumin; Zhou, Guoxin; Yao, Zhangliang

doi:10.1371/journal.pone.0068756

Cited by 9 publications

(8 citation statements)

References 52 publications

(63 reference statements)

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“…Sun et al (2002) studied the S. litura sex pheromone mating system and found that the sex pheromone components, Z9, E11-14:Ac and Z9, E12-14;Ac, which were collected from female S. litura of Shanghai, China, had a ratio of 100:27; however, Tamaki & Yushima (1974) studied S. litura in Japan and found that the proportion of the same two components was 9:1. These variations could have been caused by various natural factors, including food (Groot et al, 2008), age, mating status, and environmental conditions such as photoperiod, temperature (Ono, 1994;Ding et al, 2014) and the use of pesticides (Trimble et al, 2004;Wei et al, 2004;Shen et al, 2013), which are factors with known effects on the female sex pheromone biosynthesis pathway. Accordingly, conspecific males adapt to these biotic and abiotic factors (Jarriault et al, 2009;Groot et al, 2010;Barrozo et al, 2011;Deisig et al, 2012;Rabhi et al, 2014Rabhi et al, , 2016Schlager et al, 2015), which leads to the modulation of odour-driven behaviour through the concerted regulation of odour maps (Saveer et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Key genes of the sex pheromone biosynthesis pathway in female moths are required for pheromone quality and possibly mediate olfactory plasticity in conspecific male moths in Spodoptera litura

Lin

Wang

2017

Insect Molecular Biology

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Ninety sex pheromone biosynthesis genes in Spodoptera litura were identified in transcriptome data and were investigated and classified into the following five groups: fatty acid synthase, beta oxidase, fatty acyl-coenzyme A (CoA) reductase, desaturase and acetyl-CoA acetyltransferase. Fourteen femalespecific genes were identified through semiquantitative PCR, and 15 additional genes had expression levels that were 3-to 10-fold higher in females than in males. The majority of the genes had higher expression levels in the sex pheromone glands. Injection of double-stranded RNA (dsRNA) against nine selected genes showed that downregulation of Desaturase 3 (Des3), Des5 or fatty acyl coenzyme A reductase 17 (FAR17) significantly changed the ratio of the four sex pheromone components (Z,E) -9,11-tetradecadienyl acetate (Z9E11-14:Ac), (Z,E)-9,12-Tetradecadienyl acetate(Z9E12-14:Ac), (Z)-9-tetradecenyl acetate (Z9-14:Ac), (E)-11-Tetradecenyl acetate(E11-14:Ac). These key genes were differentially expressed in female moths collected from different geographical regions. Furthermore, field bioassays demonstrated geographical variation in the olfactory profile of male moths in response to the different sex pheromone mixtures, which therefore indicates that a significant variation in the sex pheromone components exists in the natural population. Our results suggest that a change in the expression of these key genes, Des3, Des5 and FAR17, in the sex pheromone biosynthesis pathway could change the ratio of the sex pheromone components. We surmise that the differential expression levels of the key genes of the sex pheromone biosynthesis pathway may lead to differential ratios of the sex pheromones in the field. Our field trapping experiment suggested that the change of the ratio of the sex pheromone components may have been adapted by the olfactory system and possibly mediate olfactory plasticity in conspecific male moths.

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Section: Discussionmentioning

confidence: 99%

Key genes of the sex pheromone biosynthesis pathway in female moths are required for pheromone quality and possibly mediate olfactory plasticity in conspecific male moths in Spodoptera litura

Lin

Wang

2017

Insect Molecular Biology

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“…Successful pest control depends on the prolongation of the efficacy of insecticides. Therefore the assessment of the sublethal effects of an insecticide is important, and several studies on the sublethal effects of insecticides have been reported for a number of lepidopteran pests including Plutella xylostella (Linnaeus) (Lepidoptera: Plutellidae) (Guo et al 2013;Wang et al 2011;Yin et al 2008), Helicoverpa armigera (Hübner), S. littoralis and Mamestra brassicae (Linnaeus) (Lepidoptera: Noctuidae) (El-Sheikh 2015; Moustafa et al 2016;Parsaeyan et al 2013;Shen et al 2013). The disturbance could reflect protective physiological responses such as the increment of cytochrome P450-dependent monooxygenases, carboxylesterases (CarE), and/or glutathione S-transferases (GST) that play important roles in insecticide metabolism (Yu 2004).…”

Section: Introductionmentioning

confidence: 99%

Toxicity and sublethal effects of chlorantraniliprole and indoxacarb on Spodoptera littoralis (Lepidoptera: Noctuidae)

Moustafa

Fouad²,

Abdel-Mobdy

et al. 2021

Appl Entomol Zool

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Chlorantraniliprole and indoxacarb insecticides exhibit good efficiency for control lepidopteran pests. The current study is a comprehensive analysis of the effect of lethal and sublethal concentrations of these insecticides on Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) by using the leaf dipping technique. The LC 50 values ranged from 0.06 to 1.07 mg/L, and 0.005 to 0.81 mg/L for chlorantraniliprole and indoxacarb, respectively. Our results showed that the treatment of the 2nd instar larvae with LC 50 concentrations of these insecticides significantly increased the length of larval and pupal duration as well as pupal weight in most cases. While, no significant differences have been found in the percentage of hatchability except for LC 50 equivalent of indoxacarb. Female behavior regarding calling activity decreased by 50-60% following exposure to the LC 50 concentration of both insecticides. Gas chromatography analysis results showed that both insecticides lowered pheromone titer except at chlorantraniliprole LC 50 equivalent for (Z,E)-9,12-tetradecadien-l-ol acetate, and indoxacarb LC 10 equivalent for (Z)-9-tetradecenyl acetate. Additionally, the activity of mixed-function oxidases and glutathione S-transferase were elevated relative to control. The carboxylesterase activity significantly increased when assayed with both chlorantraniliprole concentrations and indoxacarb LC 10 equivalent. These results indicate that chlorantraniliprole and indoxacarb could be effective for S. littoralis control.

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“…The calling curves of the insecticide treatments for the most part fell within the boundaries of the acetone control curves, so the shift in calling period with thiacloprid was not as remarkable as the effect on the amount of calling. A detrimental effect of sublethal insecticide on calling behavior has been observed in other moth species with pyrethroid (Haynes and Baker 1985;Clark and Haynes 1992a;Yang and Du 2003;Shen et al 2013;Quan et al 2016) and organophosphate insecticides (Trimble et al 2004).…”

Section: Discussionmentioning

confidence: 93%

Sublethal Effects of Neonicotinoid Insecticide on Calling Behavior and Pheromone Production of Tortricid Moths

Navarro-Roldán

Gemeno

2017

J Chem Ecol

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In moths, sexual behavior combines female sex pheromone production and calling behavior. The normal functioning of these periodic events requires an intact nervous system. Neurotoxic insecticide residues in the agroecosystem could impact the normal functioning of pheromone communication through alteration of the nervous system. In this study we assess whether sublethal concentrations of the neonicotinoid insecticide thiacloprid, that competitively modulates nicotinic acetylcholine receptors at the dendrite, affect pheromone production and calling behavior in adults of three economically important tortricid moth pests; Cydia pomonella (L.), Grapholita molesta (Busck), and Lobesia botrana (Denis & Schiffermüller). Thiacloprid significantly reduced the amount of calling in C. pomonella females at LC (a lethal concentration that kills only 1 in 10 individuals), and altered its calling period at LC, and in both cases the effect was dose-dependent. In the other two species the effect was similar but started at higher LCs, and the effect was relatively small in L. botrana. Pheromone production was altered only in C. pomonella, with a reduction of the major compound, codlemone, and one minor component, starting at LC. Since sex pheromones and neonicotinoids are used together in the management of these three species, our results could have implications regarding the interaction between these two pest control methods.

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Effect of Larvae Treated with Mixed Biopesticide Bacillus thuringiensis - Abamectin on Sex Pheromone Communication System in Cotton Bollworm, Helicoverpa armigera

Cited by 9 publications

References 52 publications

Key genes of the sex pheromone biosynthesis pathway in female moths are required for pheromone quality and possibly mediate olfactory plasticity in conspecific male moths in Spodoptera litura

Key genes of the sex pheromone biosynthesis pathway in female moths are required for pheromone quality and possibly mediate olfactory plasticity in conspecific male moths in Spodoptera litura

Toxicity and sublethal effects of chlorantraniliprole and indoxacarb on Spodoptera littoralis (Lepidoptera: Noctuidae)

Sublethal Effects of Neonicotinoid Insecticide on Calling Behavior and Pheromone Production of Tortricid Moths

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