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斑翅肩花蝽Tetraphleps galchanoides Ghauri是铁杉球蚜Adelges tsugae Annand(hemlock woolly adelgid)的重要天敌昆虫。在云南省兰坪县天生桥林区通过实验室和林间的饲养观察与测定、林间线路调查等方法,研究了斑翅肩花蝽的生物学特性、生境及食性选择,并描述各虫态形态特征。斑翅肩花蝽在该林区一年发生2代,无世代重叠,寿命长。第1代(5月下旬至10月下旬)卵期13.8±1.6d,若虫期97.6±7.4d,成虫期55.2±4.7d;第2代(11月中旬至翌年4月下旬)卵期11.3±1.1d,若虫期105.7±8.5d,成虫期60.4±5.3d。若虫共5龄,以5龄若虫在云南铁杉Tsuga dumosa枝条树皮裂缝下或枯枝落叶层内越冬。雌雄成虫性比8.5∶1,雌雄成虫飞行缓慢,其飞行活动主要受到交尾、产卵、捕食铁杉球蚜补充营养的影响,多在树冠下层活动。该林区的斑翅肩花蝽最适生境选择:海拔为2851～2980m,云南铁杉密度为13.3～15.5株/100m、郁闭度为0.61～0.70。以寄主铁杉球蚜及附近常见的冷杉球蚜Aphrastasia pectinatae(Cholodkovsky)、华山松球蚜Pineus armandicola Zhang和落叶松球蚜Adelges laricis Vall为食物进行选择性试验,结果表明,斑翅肩花蝽对这4种球蚜的选择性存在显著差异,最喜好捕食铁杉球蚜,可成为生物防治铁杉球蚜的主要天敌之一。
Tetraphleps galchanoides Ghauri is an important predatory insect of Adelges tsugae Annand (hemlock woolly adelgid). The biological characteristics, habitat and diet selection of Stylosanthes pallens were studied in the Tianshengqiao forest area of Lanping County, Yunnan Province through the observation and determination of rearing in the laboratory and the forest, and the investigation of the inter-forest route. Morphological characteristics. Piedmont Shoulder stink bug in the forest area occurs two generations a year, no generation overlap, long life. The first (from late May to late October) eggs were 13.8 ± 1.6 days in egg stage, 97.6 ± 7.4 days in nymphs and 55.2 ± 4.7 days in adults. The second generation (mid-November to late April) had 11.3 ± 1.1d, nymph period 105.7 ± 8.5d, adult stage 60.4 ± 5.3d. The nymphs were all 5-instar nymphs, and the nymphs of 5th instar were overwintered in the cracks of bark of Tsuga dumosa branches or in litter layer. Sex ratio of male and female adults 8.5: 1, male and female adults fly slowly, its flight activity mainly by mating, spawning, predation Heptacodium aphid nutritional supplements, mostly in the lower canopy activities. The optimum habitat selection of the spotted Stink bug in the forest area is 2851 ~ 2980m above sea level, 13.3 ~ 15.5 plants / 100m density and 0.61 ~ 0.70 density in Yunnan. Aphis gossypii and the nearby common Aphrastasia pectinatae (Cholodkovsky), Pinus armandii Pineus armandicola Zhang and Adelges laricis Vall were selected as the food for selective test. There are significant differences in the selectivity of these 4 kinds of aphids, and the most favored predator aphid can be one of the main natural enemies for the biological control of aphids.