B. Pain, R. Skrentny
Aug 1, 1969
Citations
0
Influential Citations
5
Citations
Journal
Journal of the Science of Food and Agriculture
Abstract
Degradation curves were determined for thionazin applied to the soil in potato plots at three sites. Thionazin persisted longer in an acid, sandy soil than in an alkaline, clay soil, and residues were detected in the sandy soil a year after application. Results of residue analyses were confirmed by determining the kills of aphids (Myzus persicae Sulz.) ‘sleeved’ on to potato plants. Natural infestation by potato aphids was effectively decreased only on plots treated with thionazin at 40 Ib/acre (44.84 kg/ha) on the acid sandy soil.