أول تسجيل لمرض ذبول الأفرع الهندرسونيولي EriobrotraJapanica على أشجار الانكيدنيا في العراق و مكافحتها إحيائيا

Abstract EN

The result of isolation and indentification of samples of Eriobrotra japonica .

plants revealed wilt and death symptom taken from three Zones of salah AL DeenTikrit (Deglia) , samarra (Badia) .

and Balaid (Doloiaey) showed that the disease caused by the fungus HendersonulatorulideaNattrass which isolated in 100% from all samples .

This is regarded as the first record of the disease in loq out plants in Iraq .

The isolates of the fungus not showed variation in daily growth rat in the dimentions in PDA .

The pathogenicily tests showed that the there isolates SB, BD and TD caused significant increase in disease severaty .

The percentage of disease severaty in the treatrmant of fungus isolates 80% , 75% and 90% frequently.

While it was 0% in contrel treatment after 45 deys of artificiat in green house .

The tow biological contralagewtsTricodermaharzianum and Bacillus subtilis showed efticieney in protection of loqout plants from the disease severity to 25% and 40% respectively compared with the 10% in the treatment of pathogenic fungus only .

They also caused inerease in shoot dry weight .

The shoot dry weight in treatment of the two bio contrnlagant (Tricoderma.

harzianumand Bacillus.

subtilis) in the presence of pathogenic fungus reached 5.6 and 3.03 g / plant .

The shot dry weights in the control treat ment in oculoted with pathogenic fungusonly were 1.4.

g / plant respectively