The Effect of Species and Direction and Some Other Environmental Factors on Poplar Leaf aphid, Chaitophorus  euphraticus H. ( Hemiptera: Aphididae )

A.Mustafa, Shaheen; N.Almaroof, Ismail; H. Al-Shaby, Samer

	The Effect of Species and Direction and Some Other Environmental Factors on Poplar Leaf aphid, Chaitophorus euphraticus H. ( Hemiptera: Aphididae )
Journal of Tikrit University For Agriculture Sciences
Article 1, Volume 17, Issue 4, 2017, Pages 275-287
Authors
Shaheen A.Mustafa; Ismail N.Almaroof; Samer H. Al-Shaby
Abstract
The results of the field study in the Mosul forests during season 2012 and 2013 showed the effect of species and direction for some forest trees namely , Populus euphratica , P.nigra , P.deltoides and Salix acmophylla ,Rhobinia pseudoacacia and Eucalyptus camaldulensis to population density of aphid , Chaitophorus euphraticus H.The appearance of adults one trees started of the mid of April in Mosul forest and extended to the mid of November , while the nymph of aphid showed a small number during the first week of May at an average temperature of 21.2 and 19.2 C0 , relative humidity of 63.5 and 62.0 % respectively, then increased to reach a maximum during the first week of June with average reached 31.026, 32,815 ,21.234,23.316 ,18.986,20,634,7.835,8.579 ,3,09 ,4.84 and 1.297 , 2.228 insect / leaf , respectively , at average temperature of 32.70 , 32.20 and relative humidity of 28.32 , 28.0 % for both seasons , respectively. Thereafter, nymph numbers began to decrease to reach a minimum at average temperature of 16.1 , 15. 0 and relative humidity of 65.7 , 71.0 % during the first week of November . This results showed that the higher average for the number of nymph and adults were on the trees, P.euphratica , P.nigra and P.deltoids , while the lower average obtained on Salix acmophylla , Rhobinia pseudoacacia and Eucalyptus camaldulensis for both seasons of this study. 14.82, 16.02 ,, 11.68 , 12.89,, and 10.12 , 11.17 5.33 , 5.94 , 2.15 , 3.08, and 0.47, 0.77, The study has also shown a significant correlation between temperature and numbers of insect and non significant with relative humidity generally , Poplar species and direction did affect on the population density of aphid and the insects preferred eastern and northern side's for feeding. Statistical analysis indicated superiority for the euphratic poplar species in the average number of the insects which have reached 14.82 and 16.04 insect /leaf however, the lower average of the insects was noticed on the eucalyptus trees which reached 0.47 and 0.77 insect / leaf, respectively.
Keywords
temperature; Relative humidity; forest; poplar leaf aphid; Chaitophorus euphraticus H

Statistics Article View: 21 PDF Download: 6