The aim of this study was to evaluate the effect of the herbicide atrazine, recommended for weed control in corn, on 10 species of Trichogrammatidae (Hymenoptera). A female of each trichogrammatid was placed individually in a test tube (no-choice) with a card containing approximately 45 Anagasta kuehniella Zeller (Lepidoptera: Pyralidae) eggs. Parasitism by these trichogrammatids was allowed for 48 h, and the cards were sprayed with the herbicide atrazine at 6 L/ha, along with a control (distilled water). Atrazine reduced the emergence of Trichogramma bruni Nagaraja females, but increased that of Trichogramma pretiosum Riley, Trichogramma demoraesi Nagaraja, Trichogramma galloi Zucchi, and Trichogramma soaresi Nagaraja. In addition, atrazine reduced the sex ratio of T. bruni, Trichogramma atopovirilia Oatman & Platner, and Trichogramma bennetti Nagaraja & Nagarkatti, and increased that of T. demoraesi and T. soaresi. The herbicide was slightly harmful to T. bennetti and T. bruni, but was relatively harmless to the other species of Trichogrammatidae based on the standards of the International Organization for Biological Control (IOBC).
How to translate text using browser tools
1 September 2015
Effects of Atrazine-Based Herbicide on Emergence and Sex Ratio of Trichogrammatidae (Hymenoptera)
Germano Leão Demolin Leite,
Paula Daiana de Paulo,
José Cola Zanuncio,
Anarelly Costa Alvarenga,
Marcus Alvarenga Soares,
Wagner de Souza Tavares,
Leonardo David Tuffi-Santos,
Paulo Roberto de Carvalho Spínola-Filho
Florida Entomologist
Vol. 98 • No. 3
September 2015
Vol. 98 • No. 3
September 2015
biological control
controle biológico
egg parasitoid
parasitoides de ovos
Trichogramma
Zea mays