Effectiveness of some organic compounds in controlling pathogenic fungi associated with roots of date palm offshoots in New Valley Governorate, Egypt [electronic resource].

Includes reference.

Root rot and wilt disease complex was detected in different date palm offshoots in nurseries and fields in New Valley Governorate. Percentage of disease incidence and severity in EI-Kharga, Paris, ElDakhla, EI-Farafrah and Eastern Owinat districts were different. The average percentage of disease incidence and severity of the disease in surveyed areas were 35.4-70.3% and 26.0, 57.0%, respectively. Frequency of the isolated fungi from rotted roots was varied according to the locality. Fusarium oxysporum was the most frequent fungus in all locations, followed by the other isolated fungi. Pathogenicity tests showed that Fusarium oxysporum, F. solani, F. moniliforme, F. equiseti and F. semitectium were pathogenic to date palm offshoots, but they differed in their pathogenic capabilities. Fusarium oxysporum, F. solani and F. moniliforme caused the highest disease incidence and severity. Evaluation of three organic compounds (Baker's yeast, BioHealth and Humic acid) and one fungicide (Maxim XL) against the disease was conducted on date palm offshoots of Saidy and Barhee varieties under field conditions and natural infection. Maxim XL, Humic acid and Bio-Health gave the highest reduction of disease severity of root rot and wilt on date palm offshoots compared to untreated (control). Soil treatment with organic compounds can be used as a safety control measure of the disease on date palm offshoots.

Summary in Arabic.

1