EFFECT OF DIFFERENT DENSITIES OF INSECT BLACK BEAN APHID Aphis fabae (Scop.) ON BIOLOGICAL PERFORMANCE of LARVAE AND PUPA OF THE PREDATOR Chrysoperla mutata (McL | ||
| IRAQ JOURNAL OF AGRICULTURE | ||
| Article 1, Volume 21, Issue 2, December 2016, Pages 0-0 | ||
| Authors | ||
| J. K. Al-Rubeae; H. A. MUTAR | ||
| Abstract | ||
| The effect of different densities of Black bean aphid Aphis fabae on the biological function of larvae and pupa of the predator Chrysoperla mutata were conducted in biological unit laboratories, Agriculture college, Baghdad university , under conditions of 25±2 C˚and 60-70% R.H. The results showed that the period of larval development and mortality percentage correlated negatively with density of aphid nymphs . The shortest larval period was 14.2 days with lowest mortality of 20% at the density of 50 nymphs aphid however , the period of larval development increased to 24.8 days with 80% mortality at the density of 5 nymphs with significant differences. Predation efficiency of predator larvae correlated positively with density of aphid nymphs. Daily consumption were 12.8 nymph ins average at the density of 50 nymphs, while the average were 20.6 , 35.8 , 47 and 56 nymphs at the densities 10,20,30 and 40 nymphs in respectively with significant differences Feeding of predator larvae on different densities of aphid nymphs correlated negatively with pupal stage period which were 12.6, 11.2, 9.8, 9.2 ,8.4 and 7.8 days in average at 5, 10,20.30 ,40 and 50 aphid nymphs respectively with significant differences , but it was not effected on adult emergency .Recommand to rear the predator on the density of 50 Blackbean aphid nymphs | ||
|
Statistics Article View: 51 PDF Download: 25 |
||