Resistência de cultivares de Glycine max a Bemisia tabaci (Gennadius, 1889) (Hemiptera: Aleyrodidae).

Abstract

Among the factors that can affect soybean productivity, the attack of Bemisia tabaci (Gennadius, 1889) biotype B stands out. Thus, the objective of this study was to evaluate the resistance of Glycine max in field and laboratory conditions. The field experiment in the 2015 to 2018 harvests were conducted in the area of the technology transfer support center of Embrapa Amazônia Oriental in conjunction with the Federal Rural University of the Amazon, Paragominas campus and the laboratory experiment conducted in the Entomology Department of the University Federal de Lavras, Minas Gerais. The population dynamics of B. tabaci and its correlation with abiotic factors in the field were carried out by counting the number of eggs, nymphs and adults in seven soybean cultivars in the four harvests and by collecting climatic data at the Embrapa Amazônia weather station. Eastern. Antibiosis, antixenosis and tolerance tests were performed in the laboratory to identify the types of resistance, with five cultivars of Glycine max being evaluated. According to the data obtained, it can be concluded that in the field the cultivar SYN 1183 obtained a greater infestation of B. tabaci, differing from the cultivar M 8644 IPRO which was less infested. The highest incidence of B. tabaci eggs and nymphs occurred in the early vegetative stages of soybean crop and the different correlations attested between abiotic factors and B. tabaci infestation indicate that not only the factor, but variations in factors between harvests influence the population dynamics of the insect in the field. In the laboratory, the cultivar M 8644 IPRO has resistance of the type antixenosis, antibiosis, and it is also attributed to this cultivar tolerance in the plant variables such as: height and number of leaves and the cultivar M 8210 IPRO has resistance of the type antibiosis.