苹果树的春季管理内容摘要:
2、前几年缓放后已成花的枝要适当回缩;栽植密度较大、树冠已交接的要适当回缩、挖冠(高度、宽度)。 五、疏花:人工疏花:在现蕾至落花期进行,根据树势强弱合理留花,一般15米左右留一花序只留单花;化学疏花:元巾系在盛花后 2 周喷 1000给因,金冠类在盛花后喷 10乙酸,国光、富士类在盛花后喷 1500维因,或花蕾期先喷 300稀利,花后再喷 300 乙稀利+20乙酸。 六、病虫害防治。 (一)白粉病、卷叶蛾、山楂红蜘蛛的防治。 在花前喷 50%硫磺悬浮剂 150与 25%对硫磺胶囊剂 800 倍液混合或 40%水胺硫 2000 倍液,或 20%灭扫利 3000 倍液。 在花期喷 300 倍的硼砂加 500 倍的尿素混合液 2。 (二)苹果树早期落叶病、轮纹病、炭疽病、霉心病、桃小食心虫的防治。 在花后 10即幼果速生期喷 14200 波尔多液,或 50%多菌为 700 倍液。 或 50%退菌特 700 倍液。 对于幼旺树地面喷洒 50%辛硫磷 200 倍液或 25%1605 胶囊剂 200 倍液,可防治桃小食心虫。 专利查询。苹果树的春季管理
相关推荐
n’t do anything better next time. (B) My friend is a taxi driver. He has been a taxi driver for ten years. It’s a nice job most of the time. He can meet a lot of people. He always works at night
as reached 10 million copies and the number of the readers there is 38 million. Its global circulation outside the USA has reached 40 million people throughout more than 70 countries in 21 languages.
ave perseverance. 47. What’s the Chinese meaning of the word “cooperation” in the passage? A. 友好 B. 竞争 C. 合作 D. 手术 48. In 10~15 years, China could put a man on ______ and build a space station. A.
. Who (play) the piano just now? Helen did. 8. The teacher often tells us (listen) carefully in class. 9. This morning, I heard someone (shout) Help, help! on my way to school. 10. All the students