Efeito do tratamento com produtos alternativos na repelência de Acanthoscelides obtectus (SAY) e na qualidade fisiológica de sementes de phaseolus vulgaris L. cv. IPR tuiuiú armazenadas.

Abstract

The objective of this work was to evaluate if the treatments with alternative insecticides are efficient in controlling the bean weevil (Acanthoscelides obtectus) and its influence on the physiological quality of Phaseolus vulgaris cv. IPR Tuiuiu seeds. The experimental design was completely randomized, with four replications, in a factorial scheme (10 x 4). The treatments were: black pepper (Piper nigrum), diatoms and kaolin (4 g / kg of seed); Cinnamon bark (Cinnamomum zeylanicum), orange peel (Citrus sinensis) and eucalyptus ash (Eucalyptus sp.) (1% of seed weight); neem oil (Azadirachta indica) (3 ml / kg seed); Gastoxin (6 g / t seed); plastic bottle; and control (untreated). The degree of humidity was evaluated at 0, 25, 50 and 75 days after seed treatment, as well as the other variables; percentage of germination; emergency speed index, average time of emergency, weight of one thousand seeds, percentage infested seeds and repellency test. The conclusion was that diatoms, kaolin, P. nigrum, C. zeylanicum, Eucalyptus sp. and neem oil were efficient in controlling the bean weevil without harming the physiological quality of the seeds. The kaolin and neem oil treatments were repellent only at the beginning of storage. The products C. zeilanicum, Eucalyptus sp. were repellent only at the end and C. sinensis and diatoms were repellent at the beginning and six months of storage.