Suscpetability of different cultivars of Date palm (Phoenix dactylifera L.) to Mauginiella scaettae the causal agent of inflorescnce rot.
Basrah Journal For Date Palm Research,
Volume 4, Issue 1, Pages 37-53
AbstractThe present work has been undertaken to evaluate the suscpetability of different
cultivars of date palm (Phoenix dactylifera L.) to infection with inflorescence rot
disease caused by the fungus Mauginiella scaettae.Results of field survey explained
that the highest percentage of infection were found in Shatt-Alarab and Al-Dayer
orchards and reached 1.8 ,2%, respectively, while the lowest percentage found in
Abu-Alkhassieb orchards. The highest percentage of infection recorded in Green
Gannami cultivar which was (6.1%), while the lowest percentage recorded in Barhee
cultivars, the results of study showed a high inhibitiory effect was by the fngal
isolates 7 and 8 of M.scaetae on the % viability of pollen grain compared with 92.5%
in control treatment, reduced significantely and reached 35.1%and 48.2% for two
isolates,respectively ,the inhibition effect of colony culture filterate of 7 and 8
isolates were the same on the germination of pollen grain.
The results revealed that the tissue extract of different inflorescence cultivars
varied in their effect on radial growth inhibitors of isolate 7,the lowest percentage of
inhibiton was found in tissue extract obtained from Barhee (15%),while there was no
negative effect with Sayer treatment.
Highest carbohydrate and Tanins content in pollen grain were found in Hillawi,
Sayer and Green gannami,while the lowest in Barhee.The highest tanins content
recorded in Barhee compared with other cultivars.
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