寄主心叶蜡质含量对水椰八角铁甲成虫取食和产卵的影响

In this paper, central leaf surface wax contents of 4 host plant of the nipa palm hispid (NPH), Octodonta nipae (Maulik), were determined, and the relationship between the feeding and oviposition of NPH and wax content was analyzed. The results showed that the leaf surface wax content of Chinese fan palm (CFP) Livistona chinensis R. Br, which host palm was not preference by NPH, was the highest, however, the wax content of fortunes windmill palm (FWP) Trachycarpus fortunei (Hook.) H.Wendl., canary date palm (CDP) Phoenix canariensis Hort ex Chabaud, and pin kui (PK) Phoenix hanceana Naudin, which host palms were preference by NPH, were lower. The selective feed intakes of NPH on FWP, CDP, and PK with removing the leaf wax were higher than that without removing the leaf wax. At the same time, the host leaf wax content was less than a threshold value, the feed intakes of NPH were not affected by host wax content, but when the wax content exceeded this threshold, the wax content is a key factor in limiting the feeding of NPH. The oviposition amount in CFP leaf with removal wax was larger than that without removal wax, and the oviposition amount among CFP, FWP and CDP were not significant difference, those showed that the effects of wax content on oviposition of NPH was obvious. However, the inhibition mechanism of host leaf surface wax content on the feeding and oviposition need for further research.