بررسي عاملهاي رشد جمعيت شته برگ صنوبر در اتاق رشد chaitophorus lecomelas (hom: aphididae) در اتاق رشد

Population growth parameters of poplar leaf aphid, Chaitophorus leucomelas (Horn.: Aphididea) in growth chamber

Poplar leaf aphid Chaitophorus leucomelas is one of the most important pests of poplar plantations in Iran. Economic losses from this pest may be caused through sucking plant sap and excretion of honeydew as well as disruption of photosynthesis process. In view of the high densities of the pest on poplar trees, an experiment was carried out to investigate growth parameters and life table of the insect on Populus nigra 56/53 in growth chamber at 22ｱ1 ｰC, 50-60% RH with a 16L: 8D photoperiod. Some population growth parameters of poplar leaf aphid, such as net reproductive rate (Ro), intrinsic rate of natural increase (rm) and finite rate of increase (k) were 12.12 nymphs/female, 0.211 nymphs/female/days and 1.24 days, respectively. These results somehow indicated a relatively high reproductive potential of the C. leucomelas on P. nigra 56/53.