| 摘要 |
The invention relates to novel unsubstituted or substituted 2-fluorocarbonyl-2-(2,3-dihydrobenzofuran-7-yl)hydrazinecarboxylic acid esters of formula <IMAGE> (I) wherein R1 and R2 are each independently of the other hydrogen or C1-C3alkyl, R3 and R4 are each independently of the other hydrogen, halogen, C1-C4alkyl or C1-C4-alkoxy, and R5 is C1-C4alkyl to the preparation of said compounds and to compositions containing them for use in pest control, especially for controlling insects that attack plants and animals. The novel compounds are particularly effective for controlling plant destructive sucking insects.
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