微门户首页  新闻  讨论区  活动  博客  求职招聘  行业报告  圈内成员  供应   
已读[51] 发布: 2013/06/23 13:00:58
Winnipeg Free Press For decades, Winnipeg has killed adult nuisance mosquitoes with malathion , an organophosphate that's approved for use as a pesticide but is conside...
已读[172] 发布: 2013/06/23 12:47:35
色谱条件与系统适用性试验:以聚乙二醇(PEG)-20M为固定相,涂布浓度为20%;柱温90℃。理论板数按α-蒎烯峰计算应不低于1500。 校正因子测定:取正丁醇适量,精密称定,加石油醚(30~60℃)溶解并稀释成每1ml含20mg的溶液,作为内标溶液。另取α-蒎烯对照品约30mg,精密称定,...
已读[521] 发布: 2013/06/22 14:38:30
Kansas.com Other times when this can happen are after heavy cultivating or hoeing, a hard rain or any other change in weather, Upham says. Some varieties roll more than others, he says. Leaves should flatten back out in about a ... They should be sidedressed with ...
已读[78] 发布: 2013/06/20 12:32:39
但是,近日《
已读[49] 发布: 2013/06/18 21:14:20
Southeast Missourian Neal Bergman remembers a seven-year stretch in the 2000s when crop planes doused cotton fields in the Missouri Bootheel with the insecticide malathion . "They sprayed 400,000 acres of cotton every week," he said. "It didn't matter how the wind was  ... and more »
已读[40] 发布: 2013/06/18 21:14:16
Penn State Master Gardeners (blog) If there are significant numbers of insects causing lots of damage, control methods include horticultural oils or insecticidal soaps which must come in contact with the insects or labeled insecticides such as malathion , carbaryl, methoxychor or acephate.
已读[83] 发布: 2013/06/18 21:14:07
Winnipeg Free Press Nuisance mosquito species such as Aedes vexans are not known to transmit diseases to people. The last time the city fogged for nuisance mosquitoes was 2010, an unusually buggy summer when the malathion -fogging program ran from June 19 to Sept. 6. and more »
已读[179] 发布: 2013/06/18 21:13:59
记者昨日从中国农业科学院农业资源与农业区划研究所获悉,他们在这个蔬菜基地抽取蔬菜、泥土及水样本作残余农药检测,其中大部分样本被验出含有氟虫腈或其它禁用农药。 据了解,中国农业科学院农业资源与农业区域研究所研究员张斌团队曾经对广州典型农业区的土壤、水体和空气进行了长期研究观察,...
已读[407] 发布: 2013/06/17 05:34:04
5月10日,经市公安局检测发现,王某家井水中含有机磷农药成分马拉硫磷,马拉硫磷又称为马拉松,属低毒杀虫杀螨剂。纯品马拉硫磷常温下为浅黄油状液体,挥发性小,微溶...
已读[42] 发布: 2013/06/16 10:36:43
NECN Neal Bergman remembers a seven-year stretch in the 2000s when crop planes doused cotton fields in the Missouri Bootheel with the insecticide malathion . "They sprayed 400,000 acres of cotton every week," he said. "It didn't matter how the wind was  ...
« 上一页  |   查看结果81-90共190   |  下一页 »

新闻标签:

没有标签


最新报告


求职招聘