Potential of Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae) Fed on Aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae) under Controlled Conditions
Potential of Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae) Fed on Aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae) under Controlled Conditions
Ahmad-Ur-Rahman Saljoqi1, Imtiaz Khan1*, Ijaz Ahmad1, Javed Khan2, Shahid Sattar1, Bashir Ahmad Khan1 and Muhammad Salim1
ABSTRACT
Life table attributes of Chrysoperla carnea (Steph.) fed on Myzus persicae (Sulzer) were investigated under controlled conditions at 25 °C, a relative humidity of 60 %, with a light-to-dark time ratio of 16:8, in 2018.The results regarding biological parameters indicate that larvae duration was 10.34 days. The larvae consumption rates were 379.2 aphids during their life span. Functional response of larval instars indicates that with increasing prey densities, the number of aphids consumed linearly increase and then become static after attain the asymptote level at certain densities were 25, 35 and 70 aphids per first, second and third instar larvae. The life table’s immature stage survival and female fecundity rate revealed that the stage of eggs had the greatest death rate, at 12%, followed by pre pupal stage. The lowest mortality was observed in 2nd instar stage. Sx was determined to be maximal during the second instar stage and minimal at the pre-pupal stage. The total mortality per generation (K-value) from all immature stages was 0.26. The total female fecundity was 379.0 eggs and the fertile eggs ratio were 144 and net reproductive rate (Ro) was 2.57 eggs per female/day. The intrinsic rate of natural growth (rm) was 0.34 female per female per day, with a mean generation time (T) of 3.06 days. 1.404948 females per female per day was the limited rate of growth (λ). The DT for the population was 2.06742 days. The approximate generation time (Tc)was 3.1 days and innate capacity for increase (rc) was 0.335371 days. The present finding indicates that C. carnea is a voracious predator which can very easily be utilized for the management of M. persicae.
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