pyrethrum造句
1. This article draws up the pyrethrum ester insecticide.
2. Made with purify carbon dust 、 pyrethrum no smoke 、 taste after light and do not irritate pneogaster 、 safety 、 higher effective.
3. Pyrethrum possesses some ideal characteristics of environmental compatible chemical pesticide, however its photo lability and expensive price limit its broad use in the field.
4. Objective To observe the efficacy of natural pyrethrum mosquito coil against Culex pipiens pallens by bioassay.
5. Wider application of a pyrethrum , rotenone and tobacco, and so on.
6. The Shaoxing yellow wine organic phosphorus remains, the pyrethrum remains had not picked out.
7. The output of some export crops, notably cashews, cotton, and pyrethrum, fell drastically.
8. Role in the nervous system of pests, such as DDT, parathion , carbofuran, esters, such as pyrethrum.
9. The plant materials are materials such as Sophora flavescens, tobacco, Indian chinaberry fruit, pyrethrum, climbing groundsel or Aztec marigold, etc.
10. An insecticide derived from a plant, e . g . pyrethrum ( from Chrysanthemum flowers ).