|Title:||東方果實蠅之防治現況與展望||Other Titles:||Control of Oriental Fruit Fly (Dacus dorsalis) Present Situation and Prospect||Authors:||朱耀沂
|Keywords:||東方果實蠅;甲基丁香油;滅雄法;引誘有效範圍;引誘速度;Oriental fruit fly;Dacus dorsalis;Male annihilation;Methyl engenol;Active range f or attractiveness;Velocity for attractiveness||Issue Date:||Jun-1995||Publisher:||農業試驗所||Related Publication(s):||農業試驗所特刊第51號||Start page/Pages:||279-289||Source:||台灣柑橘之研究與發展研討會專刊||Conference:||台灣柑橘之研究與發展研討會
Research and Development of Citrus in Taiwan
Oriental fruit fly (Dacus dorsalis)is one of the most destructive pests on many kinds of fruit in Taiwan. The damage by this fly is recorded from Japanses ocupied period and more than 70 year had passed since the control operation in this island. Through some error and trial of the control methods, male annihilation is already proved most effective and promising method against this fly. Then, the large scale male annihilation is started since end of July 1994 with poisoned methyl eugenol (ME) soaked fiber board. Accordingly 4.5x4.5x0.9cm fiber board are dipped in a mixture of 98% ME, 5% Naled and anti-oxidant for night. Then, lOmI of mixture are considered to be soaked into a piece of the board. In the present, 100,000ha of fruit orchard are decided for the treated area, where the ME soaked fiber boards applid in the dosage of 6 piece/ha every 2 months. The application is done by the farmer themselves. Besides, 60 localities covered whole the island are designated as the oriental fruit fly monitoring site. In those area, 9 monitor traps are set at orchard, with fruit plants, abandoned orchard and not cultivating area. Namely 540 monitor traps are used to investigate the change attracted male fly for 60 localities. In the monitor trap, cotton soaked 2m1 of poisoned ME is set. The trap is hung on a branch at the 1.5m height with 35cm Diameter and 40 cm length nylon net to accomodate the attracted male flies. No. of attracted is counted every 10 days. At the begining of moni-toring, namely on 23 July 1994. 77.7 male /trap/ day were attracted in an average of provided 540 traps. While , through 3 month¡¦s survey, No. of attracted male decreased apparently.
Accordingly, on 23 Nov., No. of attracted in average recorded 12.6, namely around 1/6 of the first survey. However, in some area, the density of the flies still keep in high level. Through preliminary analysis, it may almost due to the limited treated area and immigration of the flies from the untreated area. In this paper, the cause of the low efficiency in some localities, and the future prospective aspect are also discussed.
|Appears in Collections:||應用動物組|
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