Wednesday, November 23, 2022
问题:胸足有哪些基本环节构成?常见的基本类型有哪些?各举一种昆虫。...
Monday, November 20, 2023
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...
Monday, April 29, 2024
Sunday, June 18, 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...
Monday, April 29, 2024
Monday, November 20, 2023
Sunday, April 7, 2024
问题:胸足有哪些基本环节构成?常见的基本类型有哪些?各举一种昆虫。...
Sunday, September 11, 2022
Monday, April 29, 2024
Friday, May 10, 2024
Monday, April 29, 2024
问题:波尔多液属于()A、保护剂B、治疗剂C、有机杀菌剂D、植物源杀菌剂...
Friday, May 10, 2024
Monday, April 29, 2024
Friday, May 10, 2024
Sunday, February 18, 2024
Friday, May 10, 2024
Friday, February 2, 2024
Thursday, December 7, 2023
问题:常见的植物病原细菌有哪几个属?简述细菌病害的症状与诊断。...
Monday, April 29, 2024
问题:以下哪类病原可以通过种子和花粉传播?()A、病毒B、线虫C、细菌D、真菌...
Sunday, February 18, 2024