STUDY ON EFFECTS OF BUNCH COVERING ON DATE PALM BUNCH FADING IN IRAN
The date palm bunch fading disorder (DPBF) is the most harmful and hazardous problem in date palm plantations in southern provinces of Iran such as Hormozgan, Bushehr, Fars, Khuzestan and Kerman in the last 10 years. This disease reduces up to 85% of yield on the cultivar Mozafti in Hormozgan and almost 33% of yield on Kabkab in Bushehr from 1998 until now. Looking at past research, a principal agent for this phenomenon has not been found but the fungus Thielaviopsis paradoxa induces severe disease as an animate agent in some areas (e.g., Hormozgan). Many researchers believe that environmental hard conditions including hot winds, stress of low humidity and dust haze affect the occurrence and severity of this disease. This factorial experiment was carried out in a complete randomized blocks design (CRBD) with five treatments of kinds of bunch covers (plastic, mat, hemp and cloth bags) and control without any cover and two treatments of time of covering (at kimri and khalal stages) in eight replications, on eight 12-year-old trees of the susceptible cultivar Mordaseng in Roodan region in 2001-2003. The yields of experimental plots were harvested at August and damages were evaluated by counting wilted and dried fruits in each strand, which showed DPBF symptoms. Two years results showed that damage occurred in plastic cover 23.88%, mat cover 31.11%, cloth cover 34.57% and hemp cover 49.31% and in control treatment without cover 58.31%. Two times treatments of covering did not show any significant difference.
Karampour, F. and Davoodian, A. (2010). STUDY ON EFFECTS OF BUNCH COVERING ON DATE PALM BUNCH FADING IN IRAN. Acta Hortic. 882, 1219-1227
bunch covering, date fading, mechanical control, Iran