福建莆田花生蛴螬种类及其种群数量动态

记述了福建莆田沿海地区花生蛴螬种类2科7属14种,内含2个新种,1个中国新纪录属。其中京都大黑鳃金龟等4种为优势种,并列有田间常见种类检索表。本研究首次报导常见种类种群数量动态:小阔胫绢金龟以2、3代幼虫和个别成虫越冬,成虫、幼虫一年出现3次高峰,其年度间种群数量变动幅度较大;京都大黑鳃金龟、肖似鳃金龟和卵圆齿爪鳃金龟分别以成虫和老熟幼虫越冬,一年均出现一次高峰;常见的金龟中成虫以小阔胫绢金龟,幼虫以京都大黑鳃金龟数量居多。从而查清成虫、幼虫防治适期分别为4月中、下旬和5月下旬至6月上旬,对制定花生蛴螬综合防治技术措施具有一定的实际意义。

THE SPECIES AND BIONOMICS OF WHITEGRUBS IN PEANUT FIELDS IN PUTIAN,FUJIAN PROVINCE

This paper gives a list of 14 species of whitegrubs attacking peanut in Putain,Fujian Province.They are: Ⅰ.Melolonthidae (1)Exolontha serrulata(Gylienhal),(2)Granida sp.nov., (3)Holotrichia ouata Chang,(4)H.kiotonensis Brenske, (5)Melolontha sp.nov.,(6)Maladera ouatula(Fairmaire). Ⅱ.Rutelidae (7)Adoretus tenuimaculatus Waterhouse, (8)Anomala antiqua(Gyllenhal),(9)A.heydeni Frivaldszky, (10)A.cupripes Hope,(11)A.corpulenta Motschulsky (12,13,14)Anomala spp. The genus Granida is newly recorded for the first time from China. The two new species are to be reported elsewhere.Those marked with an asterisk are predominant species.A key for the identification of the larvae of 9 species of them is given.There are three peaks of emergence of the adults or larvae of Maladera ovatula in a year.It overwinters mainly in the second or third generation larvae and sporadically in adult stage. Holotrichia kiotonensis,H.ovata and Melolontha sp.nov.have one gene- ration in a year.They overwinter in adult and mature larvae stage.The adults of M.ovatula and the larvae of H.kiotonensis are most abundant in number.The most appropriate times for controlling the adults and the lar- vae are in middle and late April and late May until early June respectively.