Effect of releasing the parasitoid Anisopteromalus calandrae (Hymenoptera: Pteromalidae) on certain coleopteran stored products beetles in Egypt

Abstract

The effect of direct release (inside bags) of faba bean seeds or wheat grains with the release of Anisopteromalus calandrae was studied on insects populations, percentage damage seeds and percentage weight loss of stored seeds or grains due to infestation with Callosobruchus maculates (F.), Callosobruchus chinensis (L.) on faba bean seeds, Rhyzopertha dominica (F.) and Sitophilus oryzae (L.) on wheat grains at Ismalia and Sharkia governorates locations. Results showed release of A. calandrae reduced the monthly rate of increase of tested beetles on faba bean at rates between 35.20 and 42.14%. These rates resulted in populations reduction at the end of 6 month storage period at rates between 31.24 and 36.71%. In case of wheat grains the monthly rate of increase was reduced at rates between 29.05 and 46.80%. These rates resulted in populations reduction at the end of storage period at rates between 31.51 and 47.98%. The relative faba bean damage after the storage period was reduced in the range of 32.71 to 40.99% as a result of the parasitoid release. In case of wheat grains the obtained reduction in grain weight ranged between 72.67 and 81.66.

Interaction between Certain Natural Enemies and some Stored-Grain Insect Pests

“…Several parasitoids (Qumruzzaman & Islam, 2005;Ngamo et al, 2007 andAbd El-Gawad et al, 2009) and predators (Estrada & Fernandez, 1999;Quero 2003 andPekar &Zdarkova, 2004) are associated with stored-grain insect pests and exert some level of natural control on most stored-grain insect pest populations. Hymenopteran parasitoids could serve as biological control agents of coleopteran insects (Lucas & Riudavets, 2002;Qumruzzaman &Islam, 2005 andNgamo et al, 2007).…”

“…Hymenopteran parasitoids could serve as biological control agents of coleopteran insects (Lucas & Riudavets, 2002;Qumruzzaman &Islam, 2005 andNgamo et al, 2007). The larval parasitoid, Anisopteromalus calandrae (Hymenoptera: Pteromalidae) could be used in the biological control of this grain pests, Callosobruchus maculatus (F.); Callosobruchus chinensis (L.), Rhyzopertha dominica (F.) and Sitophilus oryzae (L.) on faba bean seeds and wheat grains (Timokhov and Gokhman, 2003;Abd El-Gawad et al, 2009 andHosamani et al, 2018). The use of predatory mites as naturally manipulate agents in grain stores has been nicely documented (Nielson 1998(Nielson , 2003Quero, 2003 &Pekar andZdarkova, 2004).…”