Selectivity of some insecticides and acaricides to eggs and larvae of Ceraeochrysa cubana (Hagen, 1861) (Neuroptera: Chrysopidae) in laboratory

Abstract

This work had the objetive of evaluating the selectivity of some insecticides and acaricides to eggs and larvae of Ceraeochrysa cubana in order to allow indications of their use under field conditions, where populations of this species occur. The treatments used, in ml/100 l of water, were as following: Fenpropathrin 300 CE (30 and 50), Fenitrothion 500 CE (150), Fenvalerate 200 CE (50), Fenbutatin-oxid 500 SC (50), and one check treated with water. The treatments had five replications, making a total of 50 eggs and 40 larvae. The number of hatching larvae and mortality in each instar was evaluated. The results showed that all products tested did not have ovicide action. Fenitrothion had a very high level of toxicity to every larvae instars. Fenbutatin-oxid was selective to all larvae stages.