The reduviid Sycanus falleni Stal (Heteroptera: Reduviidae) is an important predatory insect in biological control pests in vegetable, soybean, corn and rice plants. It is omnivorous species and has a wide range of prey. The influence of fed on four different preys as Pieris rapae (Linnaeus), Spodoptera litura (Fabricius), Plutela xylostella (Linnaeus) and Corcyra cephalonica (Stainton) on biological parameters, ability to eat prey and body weight of the nymph and adult of S. falleni were evaluated in laboratory conditions (26 ± 2 °C, 75 ± 5% RH and light:dark 14:10 h) in Vietnam. The biological parameters of reduviid S. falleni reared on the laboratory were determined by observing the development stage of egg, development stage of nymph, pre-oviposition period, life cycle, longevity of adult, number of eggs laid, sex ratio. The nymph and adults of reduviid S. falleni consumption the number of P. xylostella, P. rapae, S. litura and C. cephalonica larvae were different, and an adult female consumed more than an adult male while the body weight of the I and V nymphal instars, male and female adults of reduviid S. falleni wasn't significantly different (P < 0.01).

的猎蝽Sycanus falleni飞虱（异翅亚目：猎蝽科）是在蔬菜，大豆，玉米和水稻植物生物控制害虫的重要捕食性昆虫。它是杂食性物种，具有广泛的猎物。的进料在四个不同的猎物作为影响菜粉蝶（Linnaeus的），斜纹夜蛾（法氏囊），Plutela小菜蛾（Linnaeus的）和米蛾cephalonica生物参数（蛾），吃的若虫和成虫的捕食和体重能力小号在越南的实验室条件下（26±2°C，75±5％RH，光照：黑暗14:10 h）对堕落动物进行了评估。腐烂的葡萄球菌的生物学参数通过观察卵的发育阶段，若虫的发育阶段，产卵前的时期，生命周期，成年寿命，产卵数，性别比来确定在实验室饲养的卵。若虫和猎蝽成虫S. falleni消费的数量小菜蛾，菜粉蝶，斜纹夜蛾和C. cephalonica幼虫是不同的，和成年女性消耗多于一个成年男性，而体重的I和红褐线虫的雌性成虫的V夜蛾幼虫并没有显着差异（P <0.01）。