|Title:||Studies on the Control of Mealybug (Dysmicoccus brevies (Ckll.)) on Pineapples in Taiwan||Other Titles:||鳳梨粉介殼虫（Dysmicoccusbreoipes(Ckll.)）防治試驗||Authors:||Hsi-Shan Lee
|Issue Date:||1966||Publisher:||植病保護學會||Journal Issue:||8||Start page/Pages:||377-390||Source:||植物保護學會會刊||Abstract:||
Malathion 50% EC and Aldrex-2 were both used for controlling the mealybug (Dysmicoccus brevlpes Ckll.) and ants respectively. Effective control of mealybug was obtained excellently by dipping the pineapple slips into malathion for 2 minutes at the concentration of 0.1% before planting. There were almost none of mealybugs found for as long as four to five months after the pineapple planted. It is the essential factor that if the pineapples were infested by mass colonies of mealybugs in the earlier months after planting, wilt would occur seriously in the early stage of the growing plants.
Aldrex-2 was diluted into 100 times with water and sprayed at the rate of 4 kgs active ingredient per hectare on the soil surface of pineapple field for every three months. Ants control also gave the constant influence of reducing the mealybug population, however, gocd results of reducing the ants population were not gained obviously until the beginning of rainy season, during which pineapples were growing more rapidly. Shorter intervals of malathion applications during the early stage of growing pineapples revealed better results of mealybugs control than that of the treatments of longer intervals of applicaticns.
三、灌藥次數多寡，其效果雖亦有差異，惟在不防蟻區較為顯著，一般以灌藥三次並加防蟻，其效果與單獨灌藥五次者並無顯著差異。至殺蟲劑之濃度以馬拉松（Malathion EC）之有效成份0.1 ％較0.05％為優。
|Appears in Collections:||植物保護系|
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