Carpophilus humerlis（Fabricius）as pollinator and its effects on the fruit set of the sugar apple, Annona squamosa L. cv. Da-Mo

• Main Authors: Yang, Wen-Ling, 楊文玲
• Other Authors: Po-Yung Lai, Ph. D.
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/42924909156730455672

碩士 === 國立屏東科技大學 === 熱帶農業暨國際合作系所 === 96 === The Content of Abstract in The Thesis： The sugar apple, Annona squamosa L. cv. Da-Mo, is an important economic fruit crop in Taitung and its cultivated area was estimated at 5,319 ha. Recently artificial pollination was widely used to stabilize productivity and to enhance fruit quality. However, the labor cost for the artificial pollination is additional to the common costs in the sugar apple production. Therefore, to minimize the burden of the added labor cost and to simplify production process, this study utilized Carpophilus humeralis (Fabricius) to assist in pollination at time of flowering. This study also compared the effects of different treatment methods, i.e., insect pollination, artificial pollination and lighting at night, on the number of fruit set to identify a more efficient and effective treatment method to reduce the overall costs and enhance the sugar apple’s market competitiveness. This study was conducted at the flowering period for the summer fruits of the sugar apple by releasing 1,100 ea C. humeralis/ 24m2 of a net house with a total of 3,300 ea C. humeralis released in 3 net houses in the field. No pineapple plants were placed in the net to prevent the released insects from being attracted by the plants. Results of the study showed that the number of flowers in the night lighting treatment area was significantly more than that in other treatment areas of insect release, artificial pollination and check. However, an extra 30.6% of the cost was added to the night lighting treatment area besides the commonly shared costs. The number of fruits set in the artificial pollination treatment area was significantly more than that in other treatment areas of night lighting, insect release and check. The mean diameter of fruits in the artificial pollination treatment area was also larger than that in other treatment areas of night lighting, insect release and check. On the average number of fruits set, artificial pollination area (15.4 fruits) was significantly more than that of the night lighting, insect releasing and check areas. On the mean diameter of each fruit produced, artificial pollination area (92.3mm) was significantly larger than that of the night lighting, insect releasing and check areas. The artificial pollination area (139 fruits) had significantly the most total number of fruits set and the best fruit quality (89% normal fruits and 11% abnormal fruits). However, the labor cost for the artificial pollination was 11.7% over and above the total material and labor costs shared by all other treatments.