RESIDUES OF DIMETHIPIN IN PODS AND SEED OF NARROW-LEAVED (LUPINUS ANGUSTIFOLIUS L.) AND YELLOW (LUPINUS LUTEUS L.) LUPIN

摘要

When dimethipin was applied as a desiccant, its residues were present in the pods of both lupin species investigated and in the seed of both yellow lupin cultivars examined. Seed coat thickness can probably be an important factor determining the presence or absence of dimethipin residues in seed, as the content of dimethipin residue in lupin seed was inversely related to the thickness of seed coats. The yellow lupin, cv. Teo had the thinnest seed coat (150μm) and its seed contained the highest amounts of dimethipin. On the other hand, the thickest seed coats were in seed of the narrow-leaved lupin cultivars Polonez and Sonet, at 200 urn and 220 μm, respectively, and their seed did not contain any dimethipin.