Insect Growth Disruptors Cause Mouthpart Malformations, Inhibition of Feeding, and Mortality in the Neotropical Brown Stink Bug Euschistus heros (Hemiptera: Pentatomidae)

IF 1.7 4区农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY

Journal of Agricultural Science Pub Date : 2023-01-15 DOI:10.5539/jas.v15n2p40

Marcos A. Ferreira Agüero, P. S. Cremonez, P. Neves

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引用次数: 1

Abstract

The Neotropical brown stink bug, Euschistus heros, is the most important sucking pest of soybean crops, quantitatively and qualitatively affecting grain and seed. This study aimed to determine mouthpart deformities, feeding inhibition, and E. heros nymphs’ mortality when in contact with insect growth disruptors (IGDs). The effects of two insecticides of the chitin biosynthesis inhibitor group (CBIs), lufenuron and diflubenzuron, and the juvenile hormone analog pyriproxyfen were tested in the laboratory. CBI application promoted mouthpart deformities, feeding inhibition, alteration of metamorphosis, and mortality of E. heros nymphs. Although pyriproxyfen did not cause mouthpart deformation, it caused certain mortality for nymphs, possibly due to physiological disorders. Lufenuron caused feed inhibition and mortality in less time when compared with diflubenzuron and pyriproxyfen. It was also more toxic to 4th instar nymphs. The insecticides, when used in higher concentrations, increased nymph’s mortality in less time. Nymphs with deformed mouthparts were unable to feed and died. All IGDs in the tested concentrations caused 100% mortality and prevented adult formation.

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昆虫生长干扰剂导致新热带褐臭虫口器畸形、摄食抑制和死亡(半翅目:蝽科)

新热带褐臭虫(Euschistus heros)是大豆作物最重要的吸虫，从数量和质量上影响粮食和种子。本研究旨在研究昆虫生长干扰物(IGDs)对大叶蝉口器变形、摄食抑制及死亡率的影响。在室内试验了几丁质生物合成抑制剂组(CBIs)两种杀虫剂——氟虫腈和双氟苯脲，以及幼虫激素类似物吡丙醚的作用。应用CBI后，会导致海蛾口器畸形、摄食抑制、变态改变和死亡。虽然吡丙醚不会引起口器变形，但对若虫造成一定的死亡率，可能是由于生理障碍所致。与二氟苯脲和吡丙醚相比，氟虫腈在较短的时间内产生饲料抑制和死亡率。它对四龄若虫的毒性也更大。浓度越高，若虫的死亡率越低。口器畸形的若虫无法进食而死亡。在测试浓度下，所有igd的死亡率均为100%，并阻止成虫形成。

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来源期刊

Journal of Agricultural Science 农林科学-农业综合

CiteScore

2.80

自引率

5.00%

发文量

审稿时长

1.4 months

期刊介绍： The Journal of Agricultural Science publishes papers concerned with the advance of agriculture and the use of land resources throughout the world. It publishes original scientific work related to strategic and applied studies in all aspects of agricultural science and exploited species, as well as reviews of scientific topics of current agricultural relevance. Specific topics of interest include (but are not confined to): all aspects of crop and animal physiology, modelling of crop and animal systems, the scientific underpinning of agronomy and husbandry, animal welfare and behaviour, soil science, plant and animal product quality, plant and animal nutrition, engineering solutions, decision support systems, land use, environmental impacts of agriculture and forestry, impacts of climate change, rural biodiversity, experimental design and statistical analysis, and the application of new analytical and study methods (including genetic diversity and molecular biology approaches). The journal also publishes book reviews and letters. Occasional themed issues are published which have recently included centenary reviews, wheat papers and modelling animal systems.