Predatory Potential of Chrysoperla zastrowi sillemi (Esben-Peterson) and Cryptolaemus Predatory Potential of Chrysoperla zastrowi sillemi (Esben-Peterson) and Cryptolaemus Montrouzieri Mulsant on Paracoccus marginatus (Williams and Granara De Willink) Infesting Sunflower

Abstract

Predatory potential of Chrysoperla zastrowi sillemi (Esben-Peterson) and Cryptolaemus montrouzieri Mulsant on Paracoccus marginatus (Williamsand Granara de Willink) infesting sunflower was studied in the lab. Results revealed that grubs of C. zastrowi sillemi was 1.4 ± 0.5, 85.0 ± 7.3 and 13.2 ± 1.3 ovisacs, nymphs and adults, respectively. Among various instars of the predator, second and third instar were voracious and consumed 1.6 ± 0.5, 139.0 ± 5.4 and 22.8 ± 2.1 and 3.4 ± 0.5, 230.4 ± 29.2 and 32.5 ± 2.6 ovisacs, nymphs and adults of P. marginatus, respectively. Grubs of C. montrouzieri fed 7.6 ± 0.7, 153.6 ± 23.8 and 62.8 ± 11.6 ovisacs, nymphs and adults of P. marginatus to complete their life stages. Among various instars of the predator, third and fourth instar were voracious and consumed 2.2 ± 0.4, 43.6 ± 2.0 and 23.2 ± 3.0 and 2.8 ± 0.4, 69.6 ± 4.6 and 27.6 ± 4.6 ovisacs, nymphs and adults of P. marginatus, respectively. Adult C. montrouzieri consumed on an average 5.2 ± 0.8, 101.2 ± 13.5 and 35.4 ± 8.6 ovisacs, nymphs and adults of P. marginatus