综防大枣锈病内容摘要:
2、肥力贫瘠、树势衰弱、产量低、质量差的枣园,枣锈病发生严重。 因而,要科学施肥,培肥地力,为枣树生长发育提供充足的营养,提高枣树的抗病能力。 要重施基肥,以有机肥为主,每亩施腐熟优质有机肥 20003000 公斤;生长季节每 15 天左右喷施一次叶面肥,花期以喷美果露 800 倍液或 控剂 1500 倍液、硼砂 400 倍液等;花后喷美丰或奇蕊氨基酸肥 400 倍液加尿素 300 倍液;及时追施助果肥,以氮、磷、钾速效肥为主,每株 10 年生的产果树 斤,采取埋施为好。 3雨季注意排除积水。 常言道:“涝梨旱枣”,枣园长时间积水会致使枣果脱落,根系大量死亡,枣锈病加重。 所以容易积水的低洼地,雨季要及时排水,减轻锈病发生危害。 4合理修剪。 栽植密度过大、生长旺盛的枣园,要进行适当的修剪,以利通风透光,增强树势,提高树体抗病能力。 修剪以疏枝为主,对萌发的新枣头及树冠内过密的新枣头,若不利用时,均应及时疏除,以减少营养消耗,改善通风透光条件,抵御锈病发生,提高坐果率,增强果实品质。 专利查询。综防大枣锈病
相关推荐
Too often, time away from schoolbooks is seen as time wasted. This approach(观点 )does harm to children. It has created so much pressure for Chinese children that leaders of the country have issued(发布
y got on. There were a lot of people in it and it was difficult for them to put their feet. He had to grip(抓住) a back of the chair. At the next stop a boy got on the bus. He was short and couldn39。 t
2、可抑制虫卵。 4、壮旺树在春梢老熟后才环割保果,并经常观察环割口是否有介壳虫游走,及时用药喷之。 其次,在果实膨大期和放秋梢期间,防治第二、三、四代幼虫。 果实膨大期间由于气温比较高,介壳虫发生较快,用化学农药防治比较困难,有效的方法是利用天敌和喷药相结合。 1、前期不用拟除虫菊酯、高毒有机磷类农药、含柴油机油类杀螨剂,以保证天敌如瓢虫类有繁殖的时间。 2、不铲除果园杂草,让天敌有繁殖的场所
s to know how to get along with others. If you have trouble in making friends, maybe I can tell you how to do it. ★ Realize your own good points. You have skills and talents that others will like. ★
wait for help. Soon a fireman came to rescue him, but he refused to take Charlie. John didn’t agree. 10. ________ (final), the fireman got both of them out of the building. 必考词 汇背记 1. helpful adj.:
__ (battery) to Benny. Dad said the chemicals inside them 10. ________ (can) produce electricity, too. So their mum thought it was Benny who looked foolish. 必考词汇背记 1. on adv. A. ( 表示已连接、处于工作状态或使用中 )