著者

植松 秀男

出版者

日本応用動物昆虫学会

雑誌

日本応用動物昆虫学会誌 (ISSN:00214914)

巻号頁・発行日

vol.50, no.2, pp.145-150, 2006-05-25

参考文献数

11

被引用文献数

3

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シロヘリクチブトカメムシはさまざまな鱗翅目幼虫の捕食性天敵である.筆者は本種の天敵としての特性を評価するため,ハスモンヨトウ幼虫を餌として25℃,14L10Dの恒温器内で発育日数,生存率,産卵数,捕食数を調べた.卵~成虫の発育期間は雌雄に差はなく約32日であった.卵の孵化率は93.9%であった.若虫期(1齢~5齢)の累積死亡率は33%であった.産卵前期間は7~8日であった.卵は卵塊として2~3日に一度産下された.卵塊当たり平均卵粒数は75.4であった.一雌が産下した総産卵数の平均値は499個であった.本種の一世代当たり純繁殖率は153.8,一世代の平均時間は49.8日,内的自然増加率は0.101/日/雌と推定された.10頭の若虫集団は3~5齢のハスモンヨトウ幼虫を日当たり4~8頭捕殺した.雌雄1対の成虫は5齢(450~550mg)の幼虫を日当たり3~5頭捕殺した.これらの結果はシロヘリクチブトカメムシが有望な多食性土着天敵として働き得ることを示唆した.######The pentatomid bug, Andrallus spinidens (F.), is a polyphagous predator on lepidopteran larvae in crop fields in southern Japan. The basic life history biology of the bug was studied using a laboratory incubator with temperatureset at 25°C. The nymphs were reared in Petri dishes in groups of 10 and were fed on the 3rd-5th instar Spodoptera litura larvae. The mean development period from egg to adult was 32 d. The pre-oviposition period lasted 7 to 8 d, after which eggs were laid in batches every 2-3 d. The mean number of eggs per mass was 75.4 and the mean total number of eggs laid by each female was 499. The net reproductive-rate (Ro), mean generation time (T) and intrinsic rate of natural increase (r) were 153.8,49.8 d and 0.101/d/female, respectively. Groups of 10 nymphs attacked 4-8 of the 3rd-5th instar S. litura larvae per day. Pairs of adult pentatomids killed 3-5 of the 5th instar S. litura larvae weighing 450-550 mg each day. This study provides important life history information for using the predator A. spinidens as a possible biological control agent.