种植白菜和萝卜应该打什么农药怎么护理更好?

2024-10-28 07:33:50
推荐回答(5个)
回答1:

  一,.病虫防治, 用什么农药:
  1.大白菜病虫防治
  对于大白菜的病虫危害,应当坚持“预防为主,防治兼顾”的原则。一是选用高抗品种。二是实行合理轮作。三是施用适量化学药物也是必需的。具体药物品种可根据病虫种类等情况确定。防治方法:⑴于大白菜根际施用草木灰,可抑制根蛆的发育。⑵当大白菜长至6-8叶时用草木灰、石灰和2.5%敌百虫粉混合,撒施于菜根四周,防止种蝇产卵和杀死入土前的幼虫,药剂配制比例为2:1:1。⑶当田间发现有根蛆出现时,立即用90%晶体敌百虫600-800倍液灌根,杀死幼虫。 幼苗期重点防蚜虫,兼治菜螟、菜青虫、小菜蛾,每5天喷一次乐果或杀灭菊酯等农药。莲座期重点防治霜霉病,从9月中旬至10月中旬,每7-10天喷药一次,连续3-4次,用40%乙磷铝300-400倍液,或瑞毒霉一份加代森锌二份混合后配成的800-1000倍液。

  2. 萝卜的病虫防治
  病虫防治:病害有软腐病、白斑病、黑斑病及花叶病毒等。对病害以综合防治为主,加强一系列的栽培管理措施。如选无病种子,抗病品种,深沟高畦。避免土壤长期过湿,清除杂草,彻底灭虫,减少传病的媒介和施用充分腐熟的肥料等。危害萝卜的害虫有蚜虫、菜青虫、钻心虫、黄条跳虫甲等。防治可选用乐果、敌杀死、敌百虫等农药进行叶面喷雾。消灭虫源,达到高产优质的目的。

  二,白菜和萝卜的护理
  A. 白菜的护理:
  1.科学用肥:大白菜属叶用菜,生长中需氮量最大,钾次之,需磷最少,对三大元素的吸收比例约为4:1:3,对营养吸收的基本规律是:莲座期以前以氮为主,钾素次之,至结球期则以钾素为主,氮素为辅。一是要施足基肥,我们可将其界定在普通猪、牛厩肥品种上,但为提高有机肥中有效元素的含量,可在其中掺入30%左右的鸡粪或羊粪作为补充,基肥一次性施入,随整地翻入,由于大白菜根系特别发达,故某些如磷等营养元素的相对固定并不大影响大白菜的吸收利用。二是要适时追肥:若基肥充足,或定苗后补施一次有机肥,则追肥次数可确定为2次。第一次在莲座期进行,每亩追施10千克尿素或22千克硫酸铵。第二次追肥应在结球前进行,由于白菜封垄,无法进行条施等操作,故可随水冲入,用量应为上次的2倍。
  2.水分管理:大白菜从团棵到莲座期,气温日渐下降,天气温和,此间可适当浇水,莲座末期可适当控水数天,到第三次追肥再浇水。大白菜进入结球期后,需水分最多,因此,刚结束蹲苗就要浇一次透水。然后隔2-3天再接着浇第二次水。这一次很重要,这时如土壤干裂,会使侧根断裂,细根枯死,影响结球。以后,一般5-6天浇一次水,使土壤保持湿润。

  B.萝卜的护理:
  萝卜播种后,须及时进行间苗、浇水、追肥、病虫防治等一系列的工作。
  (1).间苗:萝卜幼苗出土后生长迅速,要及时间苗,否则相互拥挤,互相遮阴,光照不足,形成幼苗细弱徒长,因此凡是播种过密,间苗次数应越多,以早间苗、稀留苗、晚定苗为原则,间苗时间在有1―2片和2―3片真叶时进行,需间苗2~3次;
  (2).肥水管理;播种后要及时浇水,使种子在萌动阶段有充分的水供给吸收,要求土壤有效含水量80%以上,保证出苗快而整齐。在施肥方面,当幼苗破心时应轻追,破土后重追,追肥浓度看植株大小,还要看天追肥,以“天干浇透不浇稠,天阴浇稠不浇透”为原则,一般追肥2―3次,并结合防病治虫进行叶面追施0.2%浓度磷酸二氢钾一次,追施人粪尿和化肥,切忌浓度过大与离根部太近,以免烧根,人粪尿浓度过大,会使根部硬化,过多也会使肉质变劣,造成破裂或产生苦味。

回答2:

立秋就要种了。、种植时或之前防治地下害虫,生长期防虫,白菜主要是菜青虫一类的,包心期尤其重要,还有白菜软腐。萝卜相对轻松些。

回答3:

在北方、尤其是在东北地区,现在种秋白菜和萝卜已经晚了,农谚有:头伏萝卜、二伏白菜之说,意思是说在刚刚数伏的时候种植萝卜、在中伏的时候种植白菜是正合适的时期,都能够在上冻之前正常收获。现在种植到上冻之前没法收获成熟的植株了。
种植秋白菜和萝卜最主要的病虫害是苗期有可能受到菜青虫等的危害,打些溴氰菊酯、高效氯氰菊酯等菊酯类农药就能起到很好的防治效果。

回答4:

你是哪里人,准备大面积种,还是自己家吃啊,我是北方的,我们在七月中旬就可以种了,一般不打药,除非生虫子了,或者起腻虫了,在打药。。

回答5:

现在种植就可以了,我家的刚种上,管理的话很简单,刚种上要撒点药,省的小虫都给你调走了,平时也就是浇浇水,打药的话就打虫子的,其他的不用

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