问题：植物病害的定义是什么？...

Sunday, April 7, 2024

问题：以下哪种病害的病原是丝核菌？（）A、仙人掌茎腐病B、菊花立枯病C、月季黑斑病D、水仙大褐斑病...

Sunday, April 7, 2024

问题：以下哪类病原不会引起植物萎蔫性病害？（）A、细菌B、真菌C、线虫D、支原体...

Wednesday, August 16, 2023

问题：幼体生殖...

Saturday, December 16, 2023

问题：怎样利用交互保护反应防治病毒病？...

Sunday, February 18, 2024

问题：简述柯赫法则。...

Thursday, December 7, 2023

问题：昆虫生长发育的最适温区为（）℃。...

Tuesday, December 13, 2022

问题：初侵染...

Sunday, June 18, 2023

问题：单寄生...

Monday, January 29, 2024

问题：植物侵染性病害再侵染...

Monday, November 20, 2023

问题：柑橘溃疡病通过（）等方式进行传播。A、嫁接B、风雨C、昆虫D、枝叶接触...

Sunday, January 14, 2024

问题：拟态...

Thursday, December 7, 2023

问题：如何配制毒饵诱杀蝼蛄和地老虎？...

Tuesday, December 13, 2022

问题：昆虫的口器有哪些类型？...

Sunday, February 18, 2024

问题：以下哪类害虫的防治可采用“在植物根部附近挖过冬蛹，消灭虫源”的方...

Sunday, September 11, 2022

问题：简述非侵染性病害的主要特点。...

Sunday, February 18, 2024

问题：病原物的侵染过程的划分几个时期？...

Wednesday, February 7, 2024

问题：化学防治的缺点有哪些方面？...

Wednesday, August 16, 2023

问题：昆虫的变态有哪些类型？...

Thursday, November 3, 2022

问题：变态...

Tuesday, September 27, 2022