Abstract Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) is a primary pest that seriously infests the leaves and fruits of mango during its various developing stages. This study was conducted to evaluate the efficiency of different colored sticky traps to attract S. dorsalis in the Irwin mango orchard in Pingtung, Taiwan, and compare the catching efficiency of sticky traps set at different heights. Also, we investigated the activity patterns of S. dorsalis by using sticky traps with suitable color and placed at the correct height in the mango orchards. The results show that sticky traps in bright yellow (81.4 ± 7.2/trap) and orange yellow (66.0 ± 5.4/trap) were significantly more effective in catching thrips than were those in green, white, and blue. The results of the trap height tests showed that the number of thrips caught by sticky traps set at different height depend on the growing stage of the mango plants. The maximum amount of thrips caught in the blooming stage was on traps set 200 and 250 cm above ground level. Traps set 100, 150, and 200 cm above the ground level could catch more thrips during the fruiting stage. However, the differences of thrips caught among traps set at different heights during the vegetative growth stage are insignificant. In the study of the activity pattern of S. dorsalis, the maximum number of thrips were caught between 10:00 to 12:00 am /day (16.0 ± 1.6/trap) and these numbers were significantly more than those caught during the other time periods (p < 0.05). The results of our study can improve the monitoring technique as well as the prevention and control of S. dorsalis during the various stages of mango growth.
摘要 小黃薊馬 (Scirtothrips dorsalis Hood) 屬危害檬果之纓翅目薊馬科 (Thysanoptera: Thripidae) 主要種類，嚴重影響果實發育及植株生育。本研究在屏東地區愛文檬果園應用市售有色黏板評估其對小黃薊馬的誘捕效能，並探討田間黏板設置高度誘捕蟲數之差異，再以黏板顏色與最適設置高度的組合調查小黃薊馬在檬果園中之族群活動高峰。結果顯示在亮黃、橙黃、綠、白及藍等 5 種黏板中，亮黃色與橙黃色之誘捕蟲數分別為 81.4 ± 7.2/trap 及 66.0 ± 5.4/trap，顯著多於其他顏色 (p < 0.05) 。黏板懸掛不同高度所捕獲蟲數依植株生育期之不同而異，開花期以離地高度 200 及 250 cm 較多，幼果期以 100、150 及 200 cm 較多，果實成熟期間以 150、200 及 250 cm 較多，惟於植株營養生長期各高度所誘蟲數則無顯著差異。小黃薊馬活動高峰的調查，發現於 10：00～12：00 時捕獲之蟲數最多 (16.0 ± 1.6/trap) 顯著多於其他時段 (p < 0.05)。本試驗結果可提供檬果各生育期針對小黃薊馬監測技術之改進與田間防治應用。
| Key words: Scirtothrips dorsalis Hood, catch efficiency, sticky trap, Irwin mango | | 關鍵詞: 小黃薊馬、誘捕效能、黏板、愛文檬果。 |
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