蘇鐵白輪盾介殼蟲之族群變動及藥劑防治研究

Population Fluctuation and Insecticide Control of Cycads Scale (Aulacaspis yasumatsui Takagi)

施錫彬(His-Pin Shih)

《桃園區農業改良場研究彙報》 52期 (2003/03) Pp. 19-29

https://doi.org/10.29567/ZHWHGX.200303.0002

摘要

本試驗旨在研究蘇鐵白輪盾介殼蟲之族群變動並篩選藥劑以供防治。2002年在田間調查族群變動情形，發現5月族群密度開始上升，10－11月密度達最高峰，1－4月密度最低。殺蟲劑對介殼蟲初齡移動若蟲毒性測驗，結果顯示11%百利普芬乳劑、4.95%芬普尼水懸劑、9.6%益達胺溶液、40%丁基加保扶可濕性粉劑及44%大滅松乳劑之LD50分別為112.34 ppm、49.97 ppm、72.34 ppm、297.07 ppm，表示移動若蟲對藥劑非常敏感。室內浸漬藥劑藥效測定，以95%夏油稀釋100倍、2% Citrle 100倍、44%大滅松乳劑1000倍及9.6%益達胺溶液1000倍效果顯著。田間藥效測定顯示，以44%大滅松乳劑1000倍、95%夏油100倍防治效果最佳。

關鍵字

蘇鐵白輪盾介殼蟲 ； 族群變動 ； 藥劑防治

並列摘要

Field experiments were conducted to study the population fluctuation and integrated control of cycads scale (Aulacaspis yasumatsui Takagi). Several insecticides were screened and population dynamics of cycads scale were also investigated. The population densities of A. yasumatsui in cycads field at Pate in 2002 were higher from May to November and lower from January to April. Insecticides were tested by dipping method and mortality of cycads scale was recorded 12 hours after treatment. In the mortality test for 12 h exposure, LD50 of 11% Pyipoxyfen EC, 4.95% Fipronial SC, 9.6% Imidacloprin S, 40% Carbosulfan WP, 44% Dimethoate EC were 112.34 ppm, 49.97 ppm, 72.34 ppm, 443.207 ppm and a 1:1000 dilution of 297.07 ppm, respectively. Field trials showed that a 44% Dimethoate EC and a 1:1000 dilution of 95% Summer oil EC were significantly effective to control the cycads scale.

並列關鍵字

population fluctuation ； insecticide control ； cycads scale ； Aulacaspis yasumatsui