The persistence of insecticidal chemicals in soils treated with granular formulations of aldicarb and their uptake by potato plants

Abstract

Potatoes were grown in Plainfield sand and muck treated, in furrow, with aldicarb (Temik 15G, 3.36 kg Al/ha). .Soils were contained in 2 m z field plots and had not been treated previously with pesticides. Soil, seed pieces, foliage and tubers were analyzed for the insecticide and its sulfoxide and sulfone metabolites during the 12 wk following planting. The disappearance of aldicarb from the soil was accompanied by partial conversion to the sulfoxide and sulfone. After increasing rapidly during the first 2 wk, the aldicarb concentration in the seed piece declined and a similar concentration of aldicarb sulfoxide accumulated 1. Present Address:

Interação entre inseticidas e umidade do solo no controle do pulgão e da mosca-branca em algodoeiro

“…Inseticidas sistêmicos com alta solubilidade, aplicados ao solo, podem ser lixiviados se forem aplicados antes de um bom desenvolvimento do sistema radicular; quando possuem baixa solubilidade no solo, seu controle dependerá do local de aplicação e da umidade do solo (Woodford et al, 1988;Chapman et al, 1994;Perring et al, 1999). Assim, a reduzida efi ciência de inseticidas sistêmicos aplicados ao solo geralmente é conseqüência de entraves em sua absorção (Palumbo et al, 1996;Perring et al, 1999;Mowry, 2005).…”