Rearing of two predators, Onus albidepennis (Reut.) and Onus laevigatus (Fieber) (Hem., Anthocaridae) on some insect larvae

Abstract

Larvae of Phthorimaea operculella Zell., Anagasta kuehniella Zell. and Triboliurn confusum Duv. were used successfully after paralizing them for rearing the two anthocorid predators Orius albidepennis and 0. laevigatus. The three hosts were found sufficient for normal development of the predators and for excess of egg production. The deposition of eg s was clearly raised and the mortality appeared during the nymphal stages of the predators because opthe strong twisting and resistance in case of the living host larvae was nearly avoided. The obtained numbers of adult predators were markedly increased by using this method of paralizing host larvae.

Influence des basses températures sur les potentialités biologiques d'Orius laevigatus et d'Orius majusculus (Het.: Anthocoridae)

“…La long6vit6 des femelles d'O. laevigatus varie de 18 jours ~ plus de 2 mois selon la temp6rature et l'alimentation (Tawfik & Ata, 1973 ;Zaki, 1989). Sur oeufs d'E.…”

“…kuehniella, eUe est de 34,Sjours ~i 26"C pour les femelles d'O. laevigatus (Zaki, 1989). La f6condit6 des lots t6moins est comparable ~t celle signal6e par d'autres auteurs sur la m6me proie : 160,6 ~eufs par femelle-pour O. laevigatus ~ 26 *C (Zaki, 1989), de 90,6 ~ 236,9 oeufs par femeUe selon la temp6rature et la plante h6te pour O. majusculus ~ 20 *C (Alauzet et aL, 1992).…”

“…I1 s'agit d'Orius laevigatus (Fieber) et d'Orius majusculus (Reuter). Un certain nombre de leurs caract6ristiques biologiques ont d~j~ fait l'objet d'&udes dans des conditions contr61~es (Tawfik & Ata, 1973 ;Zaki, 1989 ;Alauzet et al, 1992). Elles ont permis de pr~ciser les conditions optimales pour leur production de masse en vue de leur utilisation en iutte biologique.…”

Development, consumption rates and reproductive biology of Orius albidipennis reared on various prey

“…In Egypt, O. albidipennis is very common throughout much of the country, south to Wadi Halfa, in the desert, and in cultivated areas, especially in corn and cotton fields. It is usually found in flowers of plants infested with thrips, lepidopteran eggs or other small arthropods (Tawfik and Ata 1973;Zaki 1989).…”

Comparative laboratory experiment withOrius insidiosus andOrius albidipennis (Het.: anthocoridae), two candidates for biological control in glasshouses

“…are considered as potential control agents for F. occidentalis; O. insidiosus (Say) (van den Meiracker & Ramakers, 1991); O. laevigatus, (Fieber) (Tavella et al, 1991;Villeveille & Millot, 1991;Zaki, 1989); O. albidipennis (Reuter), (Carnero et al, 1993); O. majusculus (Reuter) (Fischer et al, 1992;Jacobson, 1993;Trottin-Caudal et al, 1991); O. tristicolor (White) (Tellier & Steiner, 1990). are considered as potential control agents for F. occidentalis; O. insidiosus (Say) (van den Meiracker & Ramakers, 1991); O. laevigatus, (Fieber) (Tavella et al, 1991;Villeveille & Millot, 1991;Zaki, 1989); O. albidipennis (Reuter), (Carnero et al, 1993); O. majusculus (Reuter) (Fischer et al, 1992;Jacobson, 1993;Trottin-Caudal et al, 1991); O. tristicolor (White) (Tellier & Steiner, 1990).…”