The insecticides thiamethoxam and chlorantraniliprole do not have side effects on the midgut of the predator Chrysoperla externa (Neuroptera: Chrysopidae)
Priscylla Costa Dantas, Geraldo Andrade Carvalho, Elizeu Sá Farias, Helen Cristina Pinto Santos, José Eduardo Serrão
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引用次数: 0
Abstract
Chrysoperla externa (Hagen) (Neuroptera: Chrysopidae) is a predator of phytophagous pests in crops; however, this natural enemy may be exposed to chemical insecticides. Thiamethoxam (neonicotinoid) and chlorantraniliprole (anthranilic diamide) are classified as selective insecticides, but their side effects on the midgut of non-target organisms are poorly understood. This study aimed to assess the toxicity and side effects of thiamethoxam and chlorantraniliprole on the midgut of C. externa larvae and adults. Chrysoperla externa larvae and adults were fed eggs of Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) and a honey solution, respectively, both containing the insecticides. Mortality rates were evaluated. Histopathological examination of the midgut was conducted on larvae and adults exposed to the calculated LC50 at one, 12, and 30 days after exposure. The results showed that both insecticides did not induce histopathological or cytotoxic effects on the midgut cells of C. externa larvae and adults. These findings suggest that thiamethoxam and chlorantraniliprole, in low concentrations, have potential to be utilized in integrated pest management strategies involving this natural enemy.
期刊介绍：
Phytoparasitica is an international journal on Plant Protection, that publishes original research contributions on the biological, chemical and molecular aspects of Entomology, Plant Pathology, Virology, Nematology, and Weed Sciences, which strives to improve scientific knowledge and technology for IPM, in forest and agroecosystems. Phytoparasitica emphasizes new insights into plant disease and pest etiology, epidemiology, host-parasite/pest biochemistry and cell biology, ecology and population biology, host genetics and resistance, disease vector biology, plant stress and biotic disorders, postharvest pathology and mycotoxins. Research can cover aspects related to the nature of plant diseases, pests and weeds, the causal agents, their spread, the losses they cause, crop loss assessment, and novel tactics and approaches for their management.
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