CONTROLE DE TRIPES POR FUNGOS PARASITAS EM Pisum sativum (Fabaceae)

Abstract

Entomopathogenic fungi are important forms of pest control with less environmental risk. This type of bioinput is still poorly evaluated when we consider pest guts in pea crops in Brazil. The binary mixture of fungi with potassium silicate, during pre-application, was seen as promising a bioprotective measure. We evaluated the parasitic fungi Beauveria bassiana (Bb), Metarhizium anisopliae (Ma) and Isaria fumosorosea (Isa) against tripe, on Pea plants (var. Gallant), under field conditions. The treatments were negotiated through a factorial (3x2)+2, with three levels of the Fungi factor (Bb, Ma or Isa), two levels of the SilK factor (without and with potassium silicate) plus the addition of two controls: absolute ( water only) and a positive result with profenofos+lufenuron. The casings were sampled using yellow sticky traps at 0, 3, 6, 9 and 12 days after application of the treatments. The quantity of casings varied depending on the treatments at 3, 6, 9 and 12 DAA. At 3 DAA the number of thrips was higher in the control compared to the other treatments. At 6 DAA, the control and the treatment with Metarhizium application presented greater quantities of casings compared to the other treatments. At 9 DAA the lowest value for the quantity of intestines was collected in the Bb+SilK treatment and at 12 DAA this response was maintained. The innovative solution presented here can improve the performance of entomopathogenic fungi applied under field conditions and should be considered as an additional option for casing management.