The spatial structure and spatial correlativity of Aphis gossypii and Erigonidium graminicola populations during different periods were investigated by geostatistic methods. The results showed that the semivariogram of A. gossypii appeared as spherical type, indicating its spatial pattern was an aggregated type with a range of 7.33-12.40 cm, while that of E. graminicola was also fitted into spherical model, indicating an aggregated spatial arrangement with a range of 6.47-20.88 cm. The amount and spatial distribution of E. graminicola were closely related to those of A. gossypii, suggesting that E. graminicola was the dominant natural enemy influencing A. gossypii population.
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Neotrop Entomol
January 2025
Department of Pesticide Chemistry and Technology, Faculty of Agriculture, Alexandria University, 21545-El-Shatby, Alexandria, Egypt.
The increasing demand for sustainable and eco-friendly pest control methods has led to a growing interest in the development of novel, plant-based pesticides. In this study, we investigated the potential of nano-emulsions containing plant oils (Portulaca oleracea, Raphanus sativus, and Rosmarinus officinalis) as a new approach for controlling three major pests: Aphis gossypii, Spodoptera littoralis, and Tetranychus urticae. Using ultrasonication, we prepared stable and uniform nano-emulsions characterized by thermodynamic properties, dynamic light scattering (DLS), and transmission electron microscopy (TEM).
View Article and Find Full Text PDFJ Agric Food Chem
January 2025
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
is a highly polyphagous pest that causes substantial agricultural damage. Temperature and insecticides are two major abiotic stresses affecting their population abundance. Heat shock proteins play an essential role in cell protection when insects are exposed to environmental stresses.
View Article and Find Full Text PDFPest Manag Sci
January 2025
College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China.
Background: The cotton-melon aphid, Aphis gossypii Glover, is a polyphagous pest damaging plants across over 100 families. It has multiple host-specialized lineages, including one colonizing Malvaceae (MA) and one colonizing Cucurbitaceae (CU). The mechanisms underlying these host relationships remain unknown.
View Article and Find Full Text PDFJ Econ Entomol
January 2025
Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA, USA.
Industrial hemp, Cannabis sativa L., is an herbaceous annual plant that has recently re-entered crop production both in the field and in greenhouses within the United States. Like many agronomic crops, hemp production faces several insect pest challenges.
View Article and Find Full Text PDFInsect Sci
January 2025
Department of Plant Biosecurity and MARA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, College of Plant Protection, China Agricultural University, Beijing, China.
Cuticular proteins are essential for cuticle formation, molting, and survival in insects. However, functional analysis of cuticular proteins in the melon aphid has been limited. In this study, we identified an endocuticle structural glycoprotein (ESG) AgSgAbd-2-like in the melon aphid Aphis gossypii, which is a member of the RR-1 subfamily of the CPR (cuticular protein containing the conserved Rebers-Riddiford motif) chitin-binding proteins.
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