Study Wheat planting date influence on infestation levels of Wheat stem sawflies (Cephidae: Hymenoptera)

This research was conducted in a field of wheat located at Suran (20 kilometers to the north of Hama city). The aim was to study the influence of wheat planting date on wheat stem sawflies infestation levels. The research showed that the early wheat seeding led to breaking the synchronization between the sensitive wheat development period suitable for the wheat stem sawfly infection and the existence of the insects in the fields.

The possibility of using some susceptible wheat varieties to European wheat stem sawfly Cephus pygmaeus L. as trap crop in Integrated Pest Management of this insect

The results showed that the use of both susceptible wheat cultivars to wheat stem sawfly Cephus pygmaeus (NN25, 12167) beside a cultivated wheat variety (ICPW 13172) reduce damage proportion by European wheat stem sawfly to cultivated variety 7.2-18.2% when the experiment was carried out within the cages and 2.6 to 5.9% in field conditions. While the variety 12167 affect negatively on the life and fitness of this insect compared with variety NN25 where it cause of killing most of the larvae within its stems (54.03% in 2011 and 70.72% in the 2012) during its development, It also reduced the fertility of females, which followed its development and emerged in the following season, it was significantly less than the fertility of female emerging of NN25. Where the average female fertility of NN25 in two seasons 47.48, 48.32 egg, while the average fertility of female of 12167 in two seasons 28.32 and 28.36 egg.

Resistance of Five Wheat Varieties to Khapra Beetle Trogoderma granarium Everts

This study aimed to compare the susceptibility of five wheat varieties Eratom, Al-Iz, Rabea, ACSAD and Om-Rabei to infestation by Khapra beetle by estimation of population density of insect phases, population reproduction rate and the loss in germination percentage at two levels of infestation 2 and 4 pairs/ 100 gr. grains and four storage periods 3, 6, 9 and 12 months under natural conditions. Results showed significant differences between varieties. Eratom was the most susceptible variety and the population density, population reproduction rate and loss in germination percentage were 2868.08 individual, 77.61 individual/month and 65.82%, while ACSAD was the least susceptible one and the values were 1004.91 individual, 23.88 individual/month and 47.49% respectively. Also infestation level and storage period had a significant effect on the population density, population reproduction rate and loss in germination percentage.