Tuesday, September 13, 2022
使用背负式机动喷雾机,低容量喷雾时,喷口离作物的高度一般在()c...
Monday, September 12, 2022
Monday, September 12, 2022
Wednesday, December 13, 2023
Monday, September 12, 2022
小地老虎()对黑光灯有强烈趋性。A、幼虫B、卵C、成虫D、蛹...
Wednesday, October 26, 2022
蝗虫的后足为()。A、步行足B、跳跃足C、捕捉足D、开掘足...
Sunday, April 7, 2024
Monday, September 12, 2022
Tuesday, September 13, 2022
Monday, September 12, 2022
Friday, April 5, 2024
有一害虫,成虫体小,翅大,翅薄,前后翅有波状花纹相连。幼虫体细长,行动时,身体一伸似以尺量物。此虫是()。A、天蛾B、舟蛾C、尺蛾D、刺蛾...
Sunday, November 26, 2023
Monday, September 12, 2022
口器向下,头部和体躯纵轴成直角,为()。A、前口式B、下口式C、上口式D、后口式...
Tuesday, March 14, 2023
Monday, September 12, 2022
越冬或越夏的病原物,对经休眠进入生长季节的植物,引起最初次侵染,...
Monday, September 12, 2022
Monday, September 12, 2022
根癌病又称(),是多种苗木上的重要病害。A、根瘤病B、根腐病C、桂花根结线虫病D、茎腐病...
Saturday, October 15, 2022
农药名称包括有效成分含量、()、剂型三部分。A、药名B、性质C、防治对象D、使用方法...
Sunday, November 26, 2023
雌雄异型的虫是()。A、大袋蛾 介壳虫B、蝼蛄 蝗虫C、叶蝉 白粉D、黄刺 蛾天蛾...
Monday, March 13, 2023