毬蘭有d白色嘢

我係新手，我想請教各位我棵毬蘭上面白色果d係什麼？

圖片如下，有塊葉黃左

又可能是棉花蟲!要處理!

我十日前都是咁!要成棵拔起換泥,消毒才可!

哎呀，好驚呀。係咪可以用稀釋漂白水噴下佢？

根粉蚧引至爛根引至落葉

lpshing 發表於 2015-8-1 22:14
哎呀，好驚呀。係咪可以用稀釋漂白水噴下佢？

我成幾十盆花重新換過Ｄ泥!你要檢查理其它盆栽!要拔起Ｄ泥看看!可能內裡重多棉棉!

謝謝大家建議，今日動工換泥清潔消毒，希望救得返啦。

根粉蚧是多肉, 苦, 毬的常客(個人感覺)
傳染性高 盆底水流到邊惹到邊
而且我覺得佢絕對會周圍爬 (D毬佢會爬上D根節位開餐)

好年冬….我覺得有一定抑制效果, 但殺不清
內吸性….其實D根死得7788吸到個鬼
我懷疑是否用農藥侵根才有可能斷尾….(D盆底水又要小心處理

有沒有前輩有根粉蚧的處理經驗可以分享
而, 有沒有那種chemial control 是有效而又藥害較低…….

AV切根重種…..有24小時冷氣/中秋打後是OK的….但現在屋企3x度....

-------------------------
Further reading:

http://www.ctahr.hawaii.edu/oc/freepubs/pdf/ip-6.pdf
http://www.ctahr.hawaii.edu/hara ... rLite%20pptx%29.pdf

Non-chemical control:
CTAHR research has demonstrated that hot-water dips
are as effective as insecticides against mealybugs. Experiments
showed that submerging potted rhapis palms
in water held at 120°F (49°C) until the internal root ball
temperature reached 115°F (46°C) was 100 percent effective
in killing root mealybugs.  Only minor phytotoxicity
to raphis was observed, a chlorosis (yellowing) of
older leaves
(留意根粉是屬需要最熱,最長時間浸殺的試驗 物種
不同植物亦有不同的耐熱度)
-------

Research has demonstrated that dipping or
drenching with liquid insecticide is more effective than
applying a granular formulation

https://books.google.com.hk/book ... alybugs&f=false

p12-13 applications of dimethoate(樂果), malathion(馬拉松) drenches(灌盆) have shown partially success
上為有機磷類

http://fshs.org/proceedings-o/1966-vol-79/484-488%20(KUITERT).pdf
"The initial examination was made 12 days after
treatment. Three additional examinations were
made at approximately one week intervals with
the exception of the Dimethoate and Baygon
treatments which caused severe plant injury
and the granular treatment. No living mealy
bugs or mealybug eggs were found in any of
the treatments applied as a dip or drench after
a period of five weeks. Live mealybugs were
found on the roots of plants treated with the
granular formulation. "

因感染性高易從其他無病徵植物番野, 是場漫長的戰爭