问题:病原物致病的主要因素有病原物分泌的酶、()、生长调节物质。
Wednesday, June 14, 2023
Wednesday, September 14, 2022
Wednesday, February 14, 2024
Wednesday, November 29, 2023
Saturday, January 27, 2024
Friday, February 23, 2024
Wednesday, September 14, 2022
Tuesday, January 2, 2024
Wednesday, September 14, 2022
Wednesday, February 15, 2023
Tuesday, December 5, 2023
Sunday, February 26, 2023
问题:依据落叶松早期落叶病回答以下问题。 落叶松早期落叶病的发病规律。
Thursday, April 6, 2023
Saturday, February 25, 2023
问题:为防止梨锈病的严重发生梨园与桧柏的距离一般不得小于()。
Friday, September 23, 2022
Saturday, February 25, 2023
Sunday, February 4, 2024
Friday, February 23, 2024
Friday, September 23, 2022
问题:落叶松球蚜分布黑龙江、四川、内蒙等地。第1寄主(),第二寄主()。
Monday, February 6, 2023