Impact of the Parasitoids <i>Anisopteromalus calandrae</i> (Howard) and <i>Lariophagus distinguendus</i> (Förster) on Three Pests of Stored Rice

oleh: Jordi Riudavets, Consuelo Belda, Cristina Castañé

Format: Article
Diterbitkan: MDPI AG 2023-04-01

Deskripsi

This study evaluated the ability of pteromalid parasitoids <i>Anisopteromalus calandrae</i> and <i>Lariophagus distinguendus</i> reared on <i>Sitophilus zeamais</i> to control stored product coleopteran pests <i>Sitophilus oryzae</i>, <i>Rhyzopertha dominica</i> and <i>Lasioderma serricorne</i>. In trials of parasitoid treatment with <i>A. calandrae</i>, fewer pests (<i>S. oryzae</i> and <i>R. dominica</i>) emerged than in the control. Parasitoid reproduction was highest with <i>S. oryzae</i> as a host, followed by <i>R. dominica</i> and <i>L. serricorne</i>. In trials of parasitoid treatment with <i>L. distinguendus</i>, fewer pests (<i>S. oryzae</i>, <i>R. dominica</i> and <i>L. serricorne</i>) emerged than in the control treatment. <i>Sitophilus oryzae</i> was the host with the highest rate of parasitoid reproduction, although the greatest level of reduction was seen in <i>R. dominica</i> (i.e., host feeding levels were higher for this host species). For <i>L. serricorne</i>, no <i>L. distinguendus</i> progeny was produced. For both species, parasitoids with significantly longer bodies and tibiae emerged from <i>S. oryzae</i>. These results suggest that both parasitoids have potential for use as biocontrol agents for different coleopteran species that attack stored rice.