Biometric and plant protection characteristics of Phaseolus vulgaris L. submitted to trophobiotic interaction of liquid biofertilizer

Abstract

This study aimed to evaluate the fermented cattle manure biofertilizer’s trophobiotic action
on the biological parameters of growth and plant protection to pests attack of Carioca bean
Phaseolus vulgaris L. Plant growth characteristics and number of leaves damaged by phytophages
were evaluated. The treatments were composed of leaf sprays of 5% liquid biofertilizer
and only water as control, in 20 replicates, in duplicates of two plants each, in a randomized
experimental design. The experiment was installed in a mandala production system with double
row spacing at a density of 50,000 plants / ha. The biometric data obtained with the studied
variables were submitted to regression analysis, the averages were submitted to analysis of
variance and compared to Student’s t-test (p <0.05). The biofertilizer demonstrates bioprotective
effects, increases the diameter of stem and reduces damages by attack of Agrotis ipsilon,
Diabrotica speciosa and Neomegatomus parvus in bean cv. Carioca.