花薊馬對柑桔之著果與傷害調查及防治探討

AN INVESTIGATION OF THE INFLUENCE OF THE FLOWER THRIPS HAWAIIENSIS (MORGAN), ON THE FRUITING OF CITRUS AND ITS CHEMICAL CONTROL

何坤耀(Kuan-Yau Ho)

《中華昆蟲》 7卷1期 (1987/03) Pp. iii+17-23

https://doi.org/10.6660/TESFE.1987003

摘要

經四年來試驗結果顯示：花薊馬對柑桔幼果之傷害不明顯，但由接蟲試驗顯示開花初期接2對薊馬則對柑桔之著果便會有顯著影響，然而需要有多少數量之薊馬才會造成經濟為害損失，則尚有待進一步探討。由3天施藥一次及6天施藥一次之結果得知，以2.8%大禧2000倍之效果為最佳，50%滅賜克1000倍為其次，藥效一般皆可維持6天。而由於3天施藥一次與6天施藥一次者之著果率與對照組比較差異都不明顯，故建議農民在柑桔開花期間儘可少用農藥來防治此種花薊馬。

並列摘要

In order to formulate effective control measures for the flower thrip, which becomes abundant when the citrus blooms, a study was taken to determine the damage of this insect pest to the flowering and fruit setting of citrus plant. Result of the experiments carried out at farmers' orchards and Chiayi Agricultural Experiment Station during 1983 to 1986 are summarized in the following. 1: Thrip damage to the young fruit was insignificant. 2. Fruiting was affected by two pairs of thrips introduced at blooming stage. Nevertheless, the economic injury level was not determined. 3. Applications of 2.8% Decis (2000-fold dilution) and 50% Mesurol (1000-fold dilution) provided effective control. And the effectiveness of each application persisted ca. 6 days. 4. Since the fruit setting did not differ significantly for those sprayed every 3 days, six days and the control, it is recommended that minimal usage of insecticides be adopted during the blooming stage for the control this thrip on citrus.