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采用室内生物测定的方法,研究了茎叶喷施40%硝磺草酮SC对3种杂草的活性和对6种草坪的安全性。结果表明:40%硝磺草酮SC对供试杂草反枝苋活性最高,对藜次之,对马唐活性最差;同一种杂草,随着叶龄增加,对40%硝磺草酮SC敏感性降低。施用40%硝磺草酮SC 120~960 g a.i./hm2,除剪股颖草坪外,不会显著抑制其他供试草坪的生物量;但该剂量会造成高羊茅、黑麦草、狗牙根、结缕草和剪股颖叶片阶段性白化,不同程度地影响草坪的观赏品质。该药剂供试剂量范围内,对早熟禾的生物量及观赏品质无影响。
The indoor bioassay method was used to study the effects of spraying 40% mesotrione SC on three kinds of weeds and the safety on six kinds of turfgrasses. The results showed that: 40% mesotrione SC had the highest activity on weeds weedgrass, the least on quinoa, and the worst on Crabgrass. With the same weed, Ketone SC sensitivity decreases. Application of 40% mesotrione SC 120 ~ 960 g ai / hm2, in addition to the lawn grass cuttings, will not significantly inhibit the other test grass biomass; but the dose will cause tall fescue, rye grass, bermudagrass, Zoysiagrass and Shendan Ying leaf stage albinism, to varying degrees, affect the lawn ornamental quality. The agent for the test dose range, bluegrass biomass and ornamental quality had no effect.