Influence of Herbivores on the Biology of Chrysoperla carnea Stephens 357
Influence of Different Hosts on Pupal
Period of C. carnea
The pupal period of C. carnea was significantly
influenced by different preys. The pupal period
recorded on different preys, viz., cotton aphids,
Helicoverpa (eggs and neonates), and jassids was
6.2, 6.40, and 6.67 days, respectively, indicating
the prey preference in that order (Table 2 ).
Balakrishnan et al. ( 2005 ) recorded 8.15, 8.00,
and 8.40 day pupal period when Chrysoperla was
provided with A. gossypii, A. craccivora, and ne-
onates of H. armigera, respectively.
Influence of Different Hosts on
Longevity of Adult C. carnea
Adult C. carnea males were identified from their
short and broader abdomen and the data on lon-
gevity of adult male Chrysoperla revealed sig-
nificant differences among the test preys. Signifi-
cantly, longer male longevity of 26.53 days was
observed on cotton aphids. The next best superior
host observed was Helicoverpa eggs and neo-
nates recording 25.40 days longevity. The short-
est longevity of 23.80 days was found on cotton
jassids (Table 3 ).
These results are in accordance with studies of
Geethalakshmi et al. (2000), Dhepe (2001) and
Mangrule ( 2002 ).
Influence of Different Hosts on
Longevity of Adult C. carnea
The longevity of C. carnea adult female was
found to be significantly influenced by different
preys, which recorded significant longer female
longevity of 38.20 days on cotton aphids. It was
followed by 36.26 days when Chrysoperla was
reared on eggs and neonates of Helicoverpa.
(Table 4 , 5 , 6 , 7 )Influence of Different Hosts on
Fecundity of C. carnea
The maximum egg laying capacity of Chrysoper-
la was recorded as 415.47 eggs laid/female when
reared on the nymphs and adults of cotton aphids.
It was followed by eggs and neonates of Helicov-
erpa and the recorded reproductive potential was
362.40 eggs laid/female. However, significantly
minimum fecundity of 342.40 eggs/female was
observed on jassid nymphs fed on cotton.References
Balakrishnan N, Baskaran RKM, and Mahadevan NR
(2005) Development and predatory potential of
green lacewing Chrysoperla carnea (Stephens)
(Neuroptera:Chrysopidae) on different prey insects.
Agri Sci Dig 25(3):194–197
Balsubramani V, Swamiappan M (1994) Development and
feeding potential of the green lacewing Chrysoperla
carnea (Stephens) on different insects pest of cotton.
Anz Schadlingskundc, Pflanzenschutz, Umweltschutz
67(8):165–167Table 7 Fecundity of C. carnea
Treatment No. of eggs laid/ female Chrysoperla
R1 R2 R3 R4 R5 Mean
Cotton aphids 417.33 414.00 416.00 416.33 413.67 415.47
Cotton jassids 340.67 344.33 344.67 340.67 342.33 342.53
Helicoverpa eggs and neonate 366.00 357.67 362.00 360.33 366.00 362.40
‘F’ test Sig.
SE(m) ± 1.135
CD at 5 % 3.499