Morfologia e efeito inseticida de extrato hidroalcoólico de alho, cultivado em diferentes condições hídricas de substrato

Abstract

The study aimed to evaluate the morphological characteristics and the insecticide effect of hydroalcoholic extract of garlic bulbs and leaves, grown in different water conditions substrate on mortality of S. zeamais. 4 water conditions were compared: 100% of the container capacity (CR), 75% CR, 50% CR and 25% CR, using a completely randomized design with four replications. The insecticidal effect of garlic extracts were evaluated by adding 50 g of corn grains Petry dishes. Then was added 1 ml of hydroalcoholic extract of different parts of the plant, at a concentration of 20%. Assessments of mortality were carried out 2, 6, 12, 24, 48 and 72 hours after exposure. The reduction in water availability negative effect on the development of garlic crop reducing the diameter and biomass. In different parts of the plants was observed insecticidal effect, and the COR treatment to 50% more efficient in mortality within the first 24 hours.