我种的一棵玫瑰长了红蜘蛛,有什么办法根除?

2024-11-18 23:09:56
推荐回答(2个)
回答1:

可试试连续用醋搽洗几次。
另外,因为老杀不掉的话,估计虫源(虫卵)没解决。可以用塑料袋把花盆罩起来拿蚊香熏杀。

回答2:

家庭养花时,常常会发生蚜虫、粉虱、蓟马等危害。若用一般农药喷洒,不仅毒性大,污染环境,而且容易产生药害,影响花卉生长。下面介绍几种除治害虫的民间验方,该法简单、方便、有效、安全,非常适合广大家庭养花爱好者使用。
1、烟灰水:取吸烟剩下的烟头50~100只,加水200~300毫升,浸泡一昼夜后,反复捣烂,用纱布过滤去除渣滓后喷洒,若加少量(0.2克左右)小苏打(碳酸氢纳)或食用碱(碳酸钠),则效果更佳。

2、洗衣粉水:洗衣粉1份,加水300~400份,将洗衣粉加入水中,稍加搅拌或振荡,待均匀溶化后可喷施。洗涤精(餐具清洗用)加水500倍、风油精加水600倍喷洒,效果亦好。

3、蛋油乳剂:取鸡蛋1只(去蛋黄食用,留蛋清),普通食用油(液体)2~3毫升,水200毫升。先配成蛋清水,再加入食油,上下振荡,在液面上看不到油花时,即可喷施,但不宜存放。

4、面糊水:取面粉1份,加水50~60份,先将面粉调湿,再用开水冲熟、稀释,不能结块有疙瘩。待冷却后即可喷施,在中午使用时效果好。此外,在煮大米粥、小米粥或其它稀饭时,盛一点稀汤稍加稀释后喷洒,也同样有效。

一、大蒜汁液。取紫皮大蒜0.5千克,加水少许浸泡片刻,捣碎取汁液,加水稀释10倍,立即喷洒,可防治蚜虫、红蜘蛛、蚧虫等;将大蒜汁液浇入盆土中可防治线虫、蚯蚓。

二、烟叶水。取烟叶50克或烟梗、吸剩的烟头100克,兑水1.5千克,煮沸半小时,或浸泡一昼夜,用手反复揉搓后,用纱布过滤,并加入0.1%~0.2%中性洗衣粉喷洒,可防治蚜虫、红蜘蛛、叶蝉、蓟马、卷叶虫及其它多种食叶害虫。

三、辣椒水。取干红辣椒50克,兑清水1千克左右煮沸10~20分钟,过滤后取其清液喷洒,可防治蚜虫、红蜘蛛、白粉虱等。

四、花椒水。取花椒�或胡椒 50克,兑水1千克左右,煮沸30~40分钟,过滤后喷洒植株,可杀死蚜虫。

五、白头翁煮水。取白头翁球根500克,加水5千克煮沸半小时,过滤后喷洒花卉,可杀死蚜虫。

六、桃叶煮水。取桃叶0.5千克,加水3千克左右煮沸30分钟,过滤后喷洒,可防治蚜虫、尺蠖及软体害虫等;将桃叶切碎晒干后,碾成粉末施入土中,可防治蝼蛄、蛴螬等地下害虫。

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