问题:速克灵可防治多种作物的()A、灰霉病B、早疫病C、菌核病D、霜霉病...
Tuesday, April 16, 2024
问题:微粒体氧化酶系是生物体内细胞色素P-450的重要组成部分。...
Tuesday, April 16, 2024
问题:悬浮剂、微乳剂、颗粒剂、水乳剂是未来农药的发展趋势。...
Thursday, September 15, 2022
问题:小菜蛾是一种在蔬菜上危害严重的害虫,能够为害萝卜、甘蓝、大白菜、西红柿、茄子等叶菜和瓜菜。...
Sunday, May 7, 2023
问题:农药毒性试验分别以下四个阶段:第一阶段:();第二阶段:();第三阶段:();第四阶段:()。...
Monday, April 22, 2024
Thursday, August 31, 2023
Saturday, February 4, 2023
Friday, March 15, 2024
问题:有机磷类杀虫剂占中国杀虫剂市场的60%以上分额,占有的比份最大。...
Wednesday, October 25, 2023
Monday, June 26, 2023
Wednesday, October 25, 2023
问题:阿维菌素属于微生物农药类农药,功夫则是菊酯类农药。...
Monday, February 13, 2023
问题:LD50表示:()A、杀死害虫种群50%个体所需的浓度B、抑制病菌50%孢子萌发所需的剂量C、杀死害虫种群50%个体所需的剂量D、杀死害虫种群90%个体所需的剂量...
Friday, December 22, 2023
问题:下列各类除草剂中,生物活性最高的是()。A、苯氧羧酸类B、二苯醚类C、磺酰脲类D、三氮苯类...
Friday, August 25, 2023
Tuesday, April 16, 2024
问题:锈病和白粉病虽然表现的症状不同,但是它们都可以用同种药剂防治。...
Monday, March 18, 2024
Tuesday, January 16, 2024
Sunday, May 7, 2023
Monday, June 26, 2023
Monday, March 18, 2024