Dissertação
Fungos entomopatogênicos combinados com inseticidas químicos no manejo de mosca-branca em soja
Fecha
2022-09-08Autor
Bevilaqua, Júlia Guimarães
Institución
Resumen
Soybean is the main agricultural crop produced and exported by Brazil, and the
whitefly is one of the main pests of this crop. Its control is carried out mainly with
chemical insecticides, which has resulted in an increase in the number of sprays
and evolution towards resistant populations. There is a need to study alternatives
for the control of this insect, and biological control with entomopathogenic fungi
can be an effective mean, offering less risk to the environment. This study aimed
to design and evaluate four management programs in two soybean cropping
seasons, including two integrated management alternatives (a spray of chemical
insecticide intercalated with a spray of biological insecticide formulated with
entomopathogenic fungi), a conventional chemical management alternative and
a biological control alternative. Two sequential sprays 10 days apart were
performed for each program, and the results of ANOVA and Scott-Knott test
(P≤0.05) revealed differences between treatments. It was found that the
integrated management consisting of a sequential spray of chemical insecticide
followed by a biological spray stood out as the best control option, presenting an
average of 72% of control efficacy for adults and 44% for nymphs. Therefore, the
integrated management of both insecticide tools can be an excellent alternative
for whitefly control in soybean.