求助，柠檬树很多树枝上都长了一个个挺大的“肉瘤”。

明若晓溪

求助，柠檬树很多树枝上都长了一个个挺大的“肉瘤”。
椭圆型大大的那种。听说这是柠檬树的病害。
现在毫无头绪，该如何处理呢。

[ 本帖最后由 明若晓溪 于 2012-5-14 11:06 编辑 ]

明若晓溪

请大家帮帮忙

rong303

我是把它全部剪掉。不知做对没有。

apatche

剪开那个瘤看看中间是不是像是被虫蛀了一样，木质已经糟了，那样的话就是一种柠檬树常见的虫害，得把这种枝都剪掉，去Bunnings买粘或者是捉小飞虫的trap。

明若晓溪

那么请问你全部剪掉之后，如今柠檬树如何了？
是否枝繁叶茂，正常生长了？

明若晓溪

我刚下午剖开了一个肉瘤。非常非常的坚硬。
里面白色的带有一粒粒小小的透明的像果实的东西。
说不上来到底如何。我拍了照片。
我上传麻烦您帮我看一下。

明若晓溪

。。。

未知

剪了吧

nmm

好像是虫卵，我也处理过都剪了，最后1年没接果，今年重长后很好

helnandez

心脑血管疾病看着

明若晓溪

全部都修剪光吗？
非常之多，有的小小的就靠在主干枝上。
如果全部修剪光，是否还需要medication之类的来喷洒防治？

未知

楼主拿一根到帮宁去问问好了

dynamix

好恶心。帮顶问。

明若晓溪

感谢大家的回复，继续等朋友来帮忙咨询一下。
去BUNNING也肯定要去一下的。唉。

Countryside

哎呀，我家的柠檬也一样的……

slicendice

我家一棵树上也有
很奇怪啊

edith921

我家的也有，没管它。。。。

slicendice

找到了 是一种马蜂引起的

It is common these days for people to come into the garden centre either describing or bringing in branches of Citrus trees (commonly lemons) which have thick knobbly sections or rounded bumps on them wondering what it is and how to treat it.

These galls or cankers are caused by a native pest called the citrus gall wasp which usually parasites native plants in its home areas of northern NSW or southern Queensland.  It has unfortunately taken a liking to introduced citrus especially lemons and grapefruit but also oranges and other citrus to a limited extent.

Its natural distribution is far north of here around the NSW and Queensland border.  Unfortunately over the last decade or so it has become more and more common in the gardens around Victoria and Melbourne.

The adult gall wasp lays eggs on the stems of the host citrus plant from late spring on new young stems.  The eggs hatch and the larvae burrow into the stems and cause the plant to form cankers around them as they develop inside.  When they are mature in late spring they come out of the gall by burrowing leaving pin sized holes.

A severe infestation can lead to a loss of vigour and dieback of the tree.  Therefore it is essential to reduce the infestation by treating the tree as in a couple of years it can lead to very reduced vigour and cropping of the tree.
There is no recommended insecticide or similar treatment for this pest and the recommended treatment is to remove the galls with larvae in early spring before the next generation of wasps appears.

Another treatment is the use of Sticky Traps which we stock in the nursery hung in the plants from early spring onwards.  These long yellow tubes attract the emerging adult wasps and they get stuck on the exposed glue.   

I used one in my small "Lot's A Lemon" Dwarf Meyer from September onwards and I can report that I had

My suggestion for treatment is to remove as many galls as possible around August and hang the sticky traps in the tree around this time too.  Feed generously in spring to ensure that good growth develops to replace the one year old growth that has been removed and the tree remains in good health.
连接http://gardenworld.net.au/garden ... the-lemon-tree.html

日月星辰

剪了扔了。

明若晓溪

非常之感谢！！！就是这个。我看了一下，然后又GOOGLE了图片和症状。
现在知道了原因，我等下就去BUNNING去问一下有什么最有效的方法。
截枝是必须的了，看看有没有什么药物可以喷洒防治。
再次感谢！！！

hy841

这玩意叫gall wasp，是柠檬树地cancer，先要把它全部手术摘除，否则里面虫卵过了easter就成虫飞出来了，然后买黄色有粘性的长条trap（gallwasp trap）夹树上，圣诞节的时候再买条新的挂，因为成虫在圣诞前后又要钻进去产卵的。以上乃bunnings的人说的。

apatche

是虫卵，先剪枝，然后去买trap, 它们喜欢在一年生的半木质枝上产卵。

slicendice

我刚把我家树上的都剪掉了
现在光秃秃的难看的很

anthonyty

剪了，应该还会长的

明若晓溪

对的。我也去过了bunning咨询了一下。现在基本上已经被修剪成了秃子。然后挂了黄色的tube。
其他的几棵橘子树和青柠树，目前还没发现这种native pest。不过为了防患于未然，我买了很多tubes。
按照树木的大小高低都挂上了。阿弥陀佛。。。希望一切都会慢慢变好。
再次感谢大家的热心回复！

明若晓溪

Name: Insectrap (Trap for citrus)
Yellow tube. $7.87 per tube in bunning.

明若晓溪

原帖由 slicendice 于 14-5-2012 14:07 发表
我刚把我家树上的都剪掉了
现在光秃秃的难看的很

我刚才也全都剪了，变成赖利头了。
不过希望一切都会好，希望来年可以重新枝繁叶茂。
我们一起加油：）

gongyi1971

mark

world

我家的柠檬树去年也是这样，我把有肿瘤的剪掉，今年一样挂果，而且很多

CISSY0001

我家柠檬树也有，看到就剪，一年四季一直结果实。感觉柠檬树不怕剪，很快就长出来