臺灣絲瓜簇葉病媒介昆蟲之研究（二）絲瓜菱紋浮塵子（Hishimonus concavus Knight）之寄主植物種類

Studies on the Vector of Loofah Witches' Broom (Ⅱ) Host Range of Hishimonus concavus Knight

本研究係分別於養蟲室及溫室內探討絲瓜菱紋浮塵子成蟲取食植物種類，及其對該蟲產卵及若發育之影響。經試驗觀察12科40種植物中，本蟲之取食植物（food plant）有4科23種，供產卵植物（oviposition plant）一科（葫蘆科（Cucurbitaceae））14種，能在其上繁殖的植物（（breeding plant）為同科中13種。成蟲在絲瓜、扁蒲、西瓜壽命較長，產卵亦多，而以苦瓜、南瓜最差，在苦瓜上則不能產卵，在南瓜上雖能產生若蟲，因其附屬毛粗硬密生無法取食而致死，一般雌蟲壽命均較雄蟲為長。第二代若蟲除苦瓜，南瓜，其他瓜類均能發育羽化為成蟲。

The host range of Hishimonus concavus Knight was studied in the greenhouse and insectory by determining the suitability of various plants species to this vector of Loofah Witches'-broom for food, oviposition, and development. Fourteen test species of Cucurbitaceae were found to be suitable for oviposition, thirteen for development of nymphes, and thirty three for foods. Adult survival well on Cucurbitaceae, poorly on Convolvulaceae, Portulacaceae; and Amaranthaceae, but differed between the sezes on the same plant species. Females in general survival longer than males. Percent adult survival (females only) after 15 days was 80-100% on 13 species of Cucurbitaceae, 60-79% on 2 species. In the Cucurbitaceae, only Momordica charantia L. was found no eggs to he laid, Cucurbita moschata Duchesne was alto to be unsuitable for development of nymphs. Luffa cylindrica Roem, Lagenaria siceraria Standl, Citrullus vulgaris Schrad and Solena heterophylla (Lour.) Cogn. were more suitable for food, oviposition, and development of Hishimonus concavus Knight.