Releasing number of Telenomus remus (Nixon) (Hymenoptera: Platygastridae) against Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) in corn, cotton and soybean

Ciência Rural

Aline Farhat Pomari²  Adeney De Freitas Bueno¹  Regiane Cristina Oliveira De Freitas Bueno¹  Ayres De Oliveiras Menezes Junior¹  Augusto Cesar Prado Fernandes Fonseca¹ 

[1] ,Universidade de São Paulo (USP) Faculdade de Filosofia Ciências e Letras de Ribeirão Preto (FFCLRP) Ribeirão Preto SP ,Brasil

关键词: biological control;    parasitoid density;    parasitism;    controle biológico;    densidade de parasitoides;    parasitismo;   

DOI  :  10.1590/S0103-84782013005000013

来源: SciELO

【 摘 要 】

Telenomus remus releasing numbers may vary depending on the crop, plant architecture and/or the plant phenological stage. Thus, we examined the number of parasitoids needed for effective pest control of Spodoptera frugiperda on corn, cotton and soybean. In all crops, the parasitism response in relation to increasing numbers of the parasitoids had a quadratic effect. In corn, the maximum parasitism observed was 99.8% and 96.8% at a parasitoid releasing number of 0.231 and 0.264 T. remus females per S. frugiperda egg at phenological stages V4 and V10, respectively. Differently, in cotton and soybean, the highest parasitim were recorded using the highest tested T. remus releasing numbers (0.297 parasitoid per S. frugiperda egg). In cotton, it was 77.8% and 73.1% at the vegetative and reproductive stages, respectively and in soybean, it was 77.3% and 54.4% also at the vegetative and reproductive stages. Thus, the appropriated T. remus releasing number might vary accordingly to the crop and plant phenological stage, being higher for soybean and cotton and lower for corn.

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