Effect of aerial applications of malathion ULV on the beneficial insectile fauna associated with cotton cultivation in the Comarca Lagunera, México

Abstract

The applications of malathion ULV in the Region Lagunera are considered as a fundamental action to combat the cotton boll weevil Anthonomus grandis, Boheman, considered the main pest in this region. The present study was carried out know the effect generated by aerial applications of malathion ULV on the beneficial insect associated with the cotton crop. Samples were carried out in four fields located in the state of Durango with different number of aerial applications during August in the 2018 and 2019 agricultural cycles. Samples consisted of 20 net sweeps in five points of each locality, giving a total of 100 blows per property, later collected material was classified and identified in the laboratory. The variables evaluated were the number of insects per 100 net sweeps of each species or taxonomic group. In the 2018 cycle, the Lucero field had two aerial applications presented a greater number of entomophagous insects compared to other fields (F = 7.088, gl = 3, P = 0.001). Britingham field had three aerial applications, two in Horizonte and only one in Pamplona. In the 2019 cycle no significant difference was observed between fields (F = 0.798, gl = 3, P = 0.503). San Sebastián field had three aerial applications, two in Lucero, only one in Jauja while in the Pamplona field no applications were made. In 2018 the most abundant were C. carnea, H. convergens and O. tristicolor, while in 2019 C. carnea, O. tristicolor and H. convergens were in descending order.

Keywords

• plagas
• algodonero
• insectos
• aplicaciones aéreas
• predios
• tratamiento