Abstract
ABSTRACT This paper provides the results of the first research designed to test for pesticide residue analysis conducted on seed yam (Dioscorea rotundata Poir) tubers produced via the Adaptive Yam Minisett technique (AYMT). AYMT uses a pesticide-based water dip to treat setts (~75 g) cut from a yam tuber, and these setts are planted to produce healthy seed yams. While the dip is known to be effective in terms of sett survival in the field along with quantity and yield of seed yams produced, one potential issue is the carry-over of chlorpyrifos from treated setts into the seed yams. The research reported here describes the results from an experimental plot established in the Federal Capital Territory of Nigeria designed to address this issue. A total of 54 seed yam tubers (18 seed yams from each plot) were analyzed from control (untreated), half-dose and full-dose pesticide dip treatments and results show that there is no carryover of chlorpyrifos from treated setts into the seed yams. There may also be potential to significantly reduce pesticide concentration in the dip, although this requires further research before a new recommendation can be developed.
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