دراسة تأثير بعض العمليات الزراعية و المبيدات الحشرية في الإدارة المتكاملة لفيروس تقزم و اصفرار الشعير الذي يصيب محصول الشعير

Abstract EN

Barley yellow dwarf viruses affect many cereal crops, and can cause economic damage.

To minimize damage, cultural practices such as planting date, plant densities and the use of insecticides were investigated.

Experiments were carried out at two locations in north Syria (Tel-Hadya farm of ICARDA (Aleppo governorate) and Harran Research Station (Edleb governorate)).

Results showed that the change in planting date from 1-15 December to 15-30 January increased the rate of infection (61.34%) and reduced grain yield and biomass (10.04% and 33.95%), respectively.

The rate of infection was reduced to 25.28% when plant density was increased from 200 seeds/m ² to 300 seeds/m ², which led to an increased grain yield and biomass of 3.39% and 12.55% respectively.

Treating seed before planting with Imidacloprid insecticide (Gaucho) (1.8 g a.i /kg seeds) reduced the infection rate by 84% and increased the grain yield and biomass by 9.2% and 46.45%, respectively.

The combined effect of planting on 1-15 December, using plant density of 300 seeds/m ² and seed treatment with Gaucho insecticide led to 97.5% decrease in virus incidence, 11.2% increase in biomass, and 51.45% increase in grain yield.