Effect of Verticillium lecanii on biological characteristics and life table of Serangium japonicum (Coleoptera: Coccinellidae), a predator of whiteflies under laboratory conditions

Abstract

Effects of entomopathogenic fungus Verticillium lecanii on biological characteristics and life table of Serangium japonicum, a predator of whiteflies against five different conidial concentrations (1×10 4 , 1×10 5 , 1×10 6 , 1×10 7 , and 1×10 8 conidia/mL) were studied under laboratory conditions. The developmental periods for all immature stages (from eggs, 1st, 2nd, 3rd, 4th instar nymph and pupae up to emergence) among the treatments were significantly different when compared to that of control, and the longest development period was observed as treated with 1× 10 8 spore/mL. However, no significant difference on the percent survival of all immature stages was observed among the treatments and control. Also, there were no significantly different effects of V. lecanii on mean generation time, intrinsic rate, the finite rate of increase and longevity of S. japonicum among the treatments and control.

Influence of the entomopathogenic fungusIsaria fumosoroseaonAxinoscymnus cardilobus(Coleoptera: Coccinellidae) under laboratory conditions

“…In this study, the net reproduction rate in the control was more than that observed for different concentrations, the mean generation time (T) was not significant, and the r m values were similar for different concentrations (Wang et al 2005). These results are also in-line with the findings of Fatiha, Huang, Ren, and Ali (2008), who studied the effect of V. lecanii characteristics and life tables of S. japonicum. They showed no significant effects of V. lecanii on mean generation time, intrinsic rate, the finite rate of increase and longevity of S. japonicum.…”

Suitability of Bemisia tabaci (Hemiptera: Aleyrodidae) biotype-B and Myzus persicae (Hemiptera: Aphididae) as prey for the ladybird beetle, Serangium japonicum (Coleoptera: Coccinellidae)

“…However, the general biology of this ladybird is not well studied. To date, most information on S. japonicum is limited to its compatibility with entomopathogenic fungi (Fatiha et al, 2008;Hu et al, 2009) or insecticides (He et al, 2012;Li et al, 2015;Yao et al, 2015). Only two studies assess the development, survival and reproduction of this ladybird when fed on B. tabaci on different host plants, which resulted in the longevity and fecundity of the females differing signifi cantly (Jing et al, 2003;Yao et al, 2011).…”

Impact of Weather Variables on Radish Insect Pests in the Eastern Himalayas and Organic Management Strategies

“…M. robertsii could be used as a potential biocontrol agent against insect pests, since it was found to be relatively safe for natural enemies [91][92][93]. Fatiha et al [94] reported that there was no effect of Verticillium lecanii on different biological parameters of the coccinellid predator (Serangium japonicum) of whiteflies. Similarly, B. thuringiensis was also safe for coccinellid predators [95][96][97].…”