幸福树上长了好多的虫子啊,都是白色的,我上传了图片,求帮助
帮我看看吧
推荐回答(4个)
通常幸福树长白色棉花状物很有可能是受到了蚧壳虫的危害。
幸福树有介壳虫可将白酒与水按照1:2的比例配制,浇到盆土上面。这种虫子一般在春季室温在7度时活动最频繁,所以可以在4月时浇一次,之后每过上半个月再浇一次,连续4次就能看到效果了。
防治这种虫子,还可用小棉球蘸上食醋,涂在受到伤害的茎和叶上面,会将虫子灭掉。这种方法不仅安全方便,而且还能起到除虫的作用,让受到伤害的叶片尽快恢复光泽。
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扩展资料:
注意事项:
1、幸福树喜欢疏松肥沃,排水良好、富含腐殖质的土壤。从外面直接买回的幸福树的土壤配置一般为田园土+腐叶土+腐熟的有机肥+河沙,按照5:3:1:1,进行混合。不过现在大多会在土壤加入珍珠岩或蛭石,避免土壤板结。
2、水分:幸福树喜欢湿润的环境,生长期间不仅保保证较高的环境湿度,还需要保持一定的土壤湿度,不过在春季,嫩芽萌发和新梢长出的过程中,要适当的控制水分,避免枝条徒长。
3、幸福树喜温暖湿热的环境,生长适温为二十到三十度之间。当环境超过三十度时,要适当的进行遮温,增加环境和叶面喷水,或者将其搬放到阴凉通风的地方。当温度降到十度以下时,要将幸福树搬到棚内。越冬期间,室内温度不低于八度,最低不能低于五度,以免出现冷害或落叶。
参考资料来源:百度百科-幸福树
参考资料来源:百度百科-蚧壳虫
是康氏粉蚧,同翅目(Homoptera)粉蚧科(Pseudococcidae)小型吸汁昆虫。世界性分布。雌虫卵圆形,行动迟缓,长约1公分,体外有白色黏粉。雌虫和幼虫群集在叶背。雄虫有两翅,能飞。危害柑橘及盆栽植物。
防治方法
1. 注意保护和引放天敌。有瓢虫和草蛉。
2. 从9月份开始,在树干上束草把诱集成虫产卵,入冬后至发芽前取下草把烧毁消灭虫卵。
3. 药剂防治。在若虫分散转移期,分泌蜡粉形成介壳之前喷洒2.5%敌杀死或功夫乳油或20%灭扫利乳油、20%速灭杀丁乳油3000-4000倍液、10%氯氰菊酯乳油1000-2000倍液、50%马拉硫磷或杀螟松或稻奉散乳油1000倍液,如用含油量0.3-0.5%柴油乳剂或粘土柴油乳剂混用,对已开始分泌蜡粉介壳的若虫害敢有很好杀伤作用,可延长防治适期提高防效。
个人推荐 氧化乐果 可通过触杀以及吸食杀死害虫(粉蚧是刺吸式口器),而且氧化乐果不易从皮肤渗入人体,对人体危害不大,是很安全且易操作的药剂。
是根据乐果在生物体内经氧化代谢而形成的一种毒力和毒性都比乐果大的化合物的原理。由工厂合成的有机磷杀虫剂,其原药是一种橙色油状的液体,有较浓的葱蒜臭味。它可溶于水,但水溶液的稳定性比乐果差,较易分解失效。氧化乐果在中性和偏酸性的溶液中较稳定,但在碱性的条件下就会很快分解失效。
氧化乐果对害虫和螨类有很强的触杀作用,尤其对一些已经对乐果产生抗药性地蚜虫,毒力较高,在低温期仍能保持较强的毒性。主要用于防治香蕉多种蚜虫、卷叶虫、斜纹夜蛾、花蓟马和网蝽等的良好药剂,低温期氧化乐果的杀虫作用表现比乐果快。
氧化乐果还有很强的内吸杀虫作用,可以被植株的茎、叶吸进植株体内,并可传送到未喷到药液部,而使在上面危害的害虫中毒死亡。因此,在使用氧化乐果时,可以采用涂茎的方法施药。一般情况下,温度的高低对氧化乐果药效的影响较小。氧化乐果属于高毒农药,但它不易从皮肤渗透进入人体,与乐果的接触毒性差异不大。
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