秋播大白菜病害防治技术内容摘要:
2、而腐烂,并发出臭味。 防治方法:苗期至莲座期喷洒丰灵(枯草芽孢杆菌)每亩 100150 克,兑水50 公斤,或用 150250 克兑水 100 公斤沿菜根挖穴灌入。 喷洒 72%硫酸链霉素可湿性粉剂 30004000 倍液,或新植霉素 4000 倍液,或 47%加瑞农可湿性粉剂(春雷氧氯铜;)800 倍液、杀得 2000 干悬浮剂(氢氧化铜)1000倍隔 10 天一次,连续防治 23 次。 3、病毒病:可出现抽筋、花叶、皱缩、坏死、畸形等症状。 防治方法:在防治蚜虫的基础上,发病初期开始喷洒 2%菌克毒克水剂(宁南霉素)300 倍液,或 20%病毒 A 可湿性粉剂 500 倍液,或 病灵号乳剂1000 倍液,或 83 增抗剂 100 倍液,隔 10 天一次,连喷 23 次。 专利查询。秋播大白菜病害防治技术
相关推荐
s from other boys but also had the fence 9. ________ (paint). Then his aunt was so happy 10. ________ she gave Tom a big apple. 必考词汇背记 1. progress n.: getting nearer to achieving or pleting sth. 进步
_____ clever girl who does well in Maths. They two often study and play together. Joyce hopes they 8. ________ (be) friends forever. Amy’s Maths teacher Mr Li is tall and thin. He uses many games in
.: express agreement for one’ s achievement 赞成 ; 称赞 ;表扬 He received high praise from everyone. 他受到了所有人的高度赞扬。 The teacher praised him for his honesty. 老师表扬了他的诚实。 ◇ 常用短语 in praise of 为了表扬 „„ praise sb.
protect tigers. 我们必须采取措施保护老虎。 ◇ 常用短语 protect ... from ... 使 „„ 免于 „„ ;防止 „„ 遭受 „„ You should protect the children from catching cold. 你应该防备孩子们受凉。 ◇ 拓展 protector n. 保护者 protection n. 保护 2. provide v.:
lder brother, too. They all live in a house 5. ________ (closely) to some mountains. Anna 6. ________ (take) the school bus to school every day. And among all the subjects, she likes Maths, Art and