摘要:
试验研究表明,萝卜蚜(Lipaphis erysimi)有翅型出现的百分率与生殖温度、生长温度、母蚜类型、寄主叶老化有密切关系.将在15℃恒温下由无翅成蚜出生的萝卜蚜饲养在15℃,20℃,25℃恒温下,有翅蚜率分别为 69.2％,58.6％和33.4％.当生殖温度为15℃,生长温度为25℃时,有翅蚜后代的有翅型率(11.8％)显著低于无翅蚜后代的有翅型率(33.4％).当生殖温度为20～25℃时,有翅蚜后代的有翅型率仅为4.7％～6.9％.在老化叶片上出生和生长的蚜虫的有翅型率高达93.1％,若将新出生在老化叶上的若蚜转移到嫩叶上生长,有翅蚜率降为22.3％.在20～25℃恒温下,有翅蚜若蚜期为8.0～9.8 d,有翅成虫寿命17.6 d,每雌产蚜37.9～39.0头.
Abstract:
The occurrence of alate turnip aphid (Lipaphis erysimi) and its development and reproduction were studied in this paper. Alate ratios decreased as the bearing and rearing temperature increased from 15℃ to 20℃ and 25℃. Significantly higher alate ratio (69.2%) was recorded when nymphs were born and reared at 15℃ compared with 11.76%at 25℃. Fewer alate forms developed when the nymphs were born by alate mother than the nymphs were born by wingless mother. A very high alate ratio(93.1 ± 1.2%) was observed when nymphs were born and reared on old leaves, oompared to 22.3 ± 2.4%when nymphs were born on old leaves and reared on young leaves. A maternal and nymph wing deter mination mechanism was suggested. Newly bom nymphs took 20.4, 15.8, 9.8 and 8.0 d to develop to alate adults when they were reared on cabbage at 10℃, 15℃, 20℃, 25℃, respectively. Winged adults survived 12.6 d at 15℃ and 17.2 ～ 17.7 d at 20 ～ 30℃, compared to only 3.7 d on average at 35℃. Higher reproductive rates (37.9 and 39.0 nymphs/female) were found at 20℃ and 25℃, compared to 7.9, 11.9and 1.3 nymphs/female at 15℃, 30℃ and 35℃ respectively.
Key words:
-
turnip aphid
.
下载: