Assessment of development and consumption rate of Macrolophus caliginosus Wagner predator on different prey stages

Abstract

BackgroundMacrolophus caliginosus Wagner is one of the most important polyphagous predatory mirid bug that attack many agriculture insect pests.MethodsThe present study was carried out to show the effect of different prey stages as Tuta absoluta (eggs and fourth larval stage), Bemisia tabaci (eggs and three nymph stages) and Aphids gossypii (1st nymph stage) on the life cycle and consumption rate of male and females of M. caliginosus as predator under laboratory condition. The experiments were started by collecting the first stage of M. caliginosus nymph and placed separately on acalypha plants situated on saturated cotton pads inside Petri dishes with an excess of each prey.ResultsThe results showed that the developmental period of the total immature stages of M. caliginosus female are affected by type and stage of tested prey. So, the duration of larval stages of female was significantly recorded the longest in case of feeding on eggs of T. absoluta compare to 1st nymph of A. gossypii. In addition to extension the adult longevity of female M. caliginosus, which fed on the 1st nymphal instar of B. tabaci more than the other pests. The consumption rate of total immature stages and adult M. caliginosus female were fed on eggs of B. tabaci was more than the other test pests. While the consumption rate of total immature stages and adult of male M. caliginosus were fed on eggs of B. tabaci was higher than that of the other pests.ConclusionsThe search was given the highlight focus on ability of mirid bugs to consume different insect species “stages” that might be facilitate rear predatory bugs under laboratory condition.