Abstract:

The safety of seed treatment imidacloprid on mung bean was evaluated under laboratory and field conditions. ‘Bailv 11’ and ‘Kelv 1’, two mung bean varieties with different seed sizes, were treated with imidacloprid at different proportions and dosages, the germination rate, gemmule and radicle length were examined after germination. The results showed that the germination rate of the two varieties had no difference when the cultural temperature was ≥20℃, while seeds treated with higher dosage of imidacloprid had significant lower gemmule length and radicle length compare with the contrast. Under the cultural temperature <20℃, the germination rate of the two varieties had no difference in the lower-dosage imidacloprid treatment, however, the germination rate, gemmule length and radicle length were significant lower than that of the contrast at the higher-dosage imidacloprid treatment. Result in field test further confirmed the effects of imidacloprid treatment. As a conclusion, it is safe to mung bean under a ratio of seed coating agents to mung bean seeds of 1:100, concentration of imidacloprid≤40%, soil moisture≥20%, and large seed varieties have higher safety.

Key words: Imidacloprid, Proportions, dosages, seed dressing, Mung Bean, Safety