Incidence of potato green aphid and Lyriomiza sp. in radish plants grown on different levels of organic fertilizer

Radish is a short cycle horticultural product from family Brassicaceae. Between the insects found on radish leaves, potato green aphid (Myzus persicae Sulzer) one of main pests this culture, causing economic damage. Synthetic fertilizers used in conventional crops can promote changes pattern amino acids plants, leading to higher insect The source fertilization factors that could influence incidence pests. objective study was evaluate and other plants grown with different doses organic fertilizer. experiment carried under semi-field conditions, Fortaleza (Ceará State). A completely randomized design used, six replicates. treatments consisted five compost (0; 45; 60; 75; 90 t.ha-1). For population survey natural enemies, counts were made three evaluations (7, 14 21 days after sowing). counting data subjected deviance analysis using generalized linear model (GLM). It observed significant differences number adults M. 75 t.ha-1. Presence leafminer (Lyriomiza sp.) without lower Even slower liberation nutrients, high (Mainly persicae) plants.