Described are a biodegradable sustained-release preparation which comprises a mixture of 99 to 10 parts by weight of an aliphatic polyester and 1 to 90 parts by weight of a modifier for the regulation of sustained releasability of an active ingredient, and the active ingredient held by said mixture; a biodegradable pheromone dispenser, wherein an aliphatic polyester is used as a sustained release layer for a pheromone contained therein as a liquid phase, said aliphatic polyester having recurring units whose ratio (I/II) of (I) the number of the carbon atoms constituting the main chain and not relating to ester linkage to (II) the number of the carbon atoms constituting the ester linkage is 2 or larger; and a biodegradable pest controlling agent which is obtained by mixing and dispersing an active ingredient and a carrier for holding said active ingredient in a biodegradable aliphatic polyester or which comprises 2 to 60 wt.% of an active ingredient, 30 to 95 wt.% of a biodegradable aliphatic polyester and 2 to 50 wt.% of a carrier for holding the active ingredient.
描述了一种可
生物降解的缓释制剂,它包括按重量计 99 至 10 份脂肪族聚酯和按重量计 1 至 90 份用于调节活性成分缓释性的改性剂的混合物,以及由所述混合物保持的活性成分;一种可
生物降解的信息素分配器,其中脂肪族聚酯用作其中所含信息素的液相持续释放层,所述脂肪族聚酯具有重复单元,其(I/II)比率为(I)构成主链且与酯连接无关的碳原子数与(II)构成酯连接的碳原子数之比为 2 或更大;一种可
生物降解的害虫控制剂,它是通过将一种活性成分和一种用于保持所述活性成分的载体混合并分散在一种可
生物降解的脂肪族聚酯中而得到的,或者它包括 2 至 60 wt.%的活性成分、30-95%的可
生物降解脂肪族聚酯和2-50%的用于保持活性成分的载体。