菜心螟（Hellula undalis）（鱗翅目：螟蛾科）之生活史初探

2015. Preliminary study of cabbage webworm (Lepidoptera: Pyralidae) life cycle

菜心螟（Hellulla undalis Fabricius ）屬鱗翅目（Lepidoptera）螟蛾科（Pyralidae），英名為cabbage webworm或radish webworm，中文俗名為蛀心蟲。分佈於非洲（埃及）、亞洲（印度、中國、臺灣）及歐洲。本蟲為寡食性（oligophagous）之植食性昆蟲，十字花科作物（Brassicaceae）為其主要之寄主植物，此外也會危害甜椒、甜菜、菠菜、茄子等。於民國30年代本省就有本蟲之為害紀錄。其中以蘿蔔及結球白菜受害最為嚴重。

"Life cycle of cabbage webworm, Hellula undalis (Lepidoptera: Pyralidae), a pest of summer crucifer crop was studied under 25℃. This pest is oligophagous insect, and main host plants are Brassicaceae. Larvae were collected from non-heading type Chinese cabbage and reared for one generation and then conducted the later experiment. The data had shown that the egg stage was 3.33+0.06 d (3-4 d)；larval stage is 17.02±0.29 d (13-25 d)；pupal stage was 7.62±0.13 d (5-9 d); adult longevity was 10.33±0.65 d (1-22 d). The average fecundity was 67.18 egg/female (1-167 egg/female). Intrinsic rate of increase (r) was 0.0744/d; the reproductive rate (Ro) was 12.32/female; the finite rate of increase (λ) was 1.0772/d; the mean generation time (T) was 33.77 d."