Journal of Agricultural Science and Food Research
Open Access
ISSN: 2593-9173
ISSN: 2593-9173
Research Article
Toxicity and Residual Activity of a Commercial Formulation of Oil from Neem, Azadirachta indica A. Juss. (Meliaceae), in the Embryonic Development of Diatraea saccharalis F. (Lepidoptera: Crambidae)
Author(s): Camila Vieira da Silva, Larissa Carla Lauer Schneider and Hélio Conte
Camila Vieira da Silva, Larissa Carla Lauer Schneider and Hélio Conte
The effects of a commercial formulation of oil from neem, Azadirachta indica A. Juss (Meliaceae), on the eggs of sugarcane borer Diatraea saccharalis F.,1794 (Lepidoptera: Crambidae), at different stages of its embryonicdevelopment were investigated. To evaluate the ovicidal activity of the oil, eggs were sprayed with the product at concentrations of 0.1%, 0.3%, 0.5%, 1.0% and 2.0% at 1, 2, 3, 4, 5 and 6 days after day were laid. Controls were sprayed with distilled water. The neem oil was toxic to eggs, mainly when applied to 2-, 3-, 4- and 5-daysold eggs. The percentage of viability reduction was 31-99%. Higher levels of caterpillar eclosion were obtained in eggs treated with neem oil at older ages. However, the resulting caterpillars had fatal morphological anomalies, except those exposed to 0.1% neem oil. Neem oil is highly toxic when sprayed on D. saccharalis eggs, as demonstrate.. View More»
DOI:
10.4172/2155-6202.1000131