| 摘要 |
<p>The compsns. contain (a) a cpd. of formula: where R1, R2 are alkyl; X is H Cl, Me; and (b) cpd. of formula where Y is H, halogen, alkyl, alkoxy; n is 0,1,2,3; Z is O or S; R3 and R4 singly or alkyl or together with the attached N-atom form a heterocyclic ring (4-6C) when n is 2, the values of Y may be the same or different. The compsns. are for pre- or post-emergence use, esp. in rice crops. The preferred application time for rice crops is 1 week before, to 2 weeks after emergence. The prefd. application rate is 50-150g of I and 100-200g of II per. 10 ares.</p> |
