The different effects of two preparations of neem (Azadirachta indica) and of Sumicidin® on the aphid predator Hippodamia variegata (Goeze) (Coleoptera: Coccinellidae)

Insect growth regulator effects of azadirachtin and neem oil on survivorship, development and fecundity of Aphis glycines (Homoptera: Aphididae) and its predator, Harmonia axyridis (Coleoptera: Coccinellidae)

“…The authors detected no significant effect of either neem treatment against H. axyridis pupae. This result differs from a study in which significantly greater H. variegata pupal mortality was observed after treatment with azadirachtin and neem seed extract, 38 and 29% mortality respectively, compared with a water control 38. Interestingly, these authors found both neem treatments to cause less mortality to the larval stage of H. variegata than observed in the present study of H. axyridis , yet they found greater pupal mortality.…”

“…Between the azadirachtin treatment groups, first instar appears more susceptible than third instar (Figs 4 and 5). Among other coccinellids, mortality rates for second‐instar Hippodamia variegata Goeze treated with azadirachtin and neem seed powder mixed with water were increased 40 and 27% respectively, compared with a water control 38. Similarly, only 42% of first‐instar Coccinella undecimpunctata L. treated with a 1% neem oil concentration (equivalent to the present study) survived to adulthood 39…”

LABORATORY AND FIELD EFFICACY OF SOME NATURAL AND CHEMICAL FORMULATION ON Aphis crassivora (KOCH) (HOMOPTERA : APHIDIDAE) AND ITS NATURAL ENEMIES

“…(Neuroptera: Chrysopidae) on the immature stages of the main insect pests of different economic host plants was studied by Salem (2002). The effect of B. bassiana and Nemazal on the natural enemies of aphid pests, including A. craccivora was also studied by James, et al (1995), Haseeb and Murad (1997), Hermann et al (1997), Sewify ( 1997), Vogt et al (1997, Murphy et al(1999) , Mesquita and Lacey (2001) , Biradar et al ( 2002), Sharma and Kashyap (2002), Hamd et al (2005), Kim et al (2005), Naveen andBrar (2006), El-Wakeil et al (2006) and Bidhan et al ( 2008).…”