الفطريات المصاحبة لأعفان طلوع و ثمار نخيل البلح في منطقة الرياض بالمملكة العربية السعودية

الملخص EN

Diseased date palm inflorescence and fruit samples were collected during two consecutive growing seasons.

Mauginiella scattae and Thielaviopsis paradoxa were isolated together from most diseased male and female inflorescence samples.

Each fungus was also isolated singly from some samples.

It was noted that these inflorescence rots were abundant in the first season (1998) as a result of heavy rain during that season compared to the second season (1999 season).

Only Alternaria alternata fungus was associated with date palm fruit rots during the two seasons (1997-1998).

No fungal pathogen was isolated from the Maskanny cultivar fruit samples with speckled disease symptoms.This is the first report regarding the isolation of T.

paradoxa and A.

alternata from rotted inflorescences and fruits of date palm, in the Riyadh region, respectively