The experiments were carried out at Nobaria province (Behiera
Governorate) during 2011 and 2012 seasons in two Privet orchards of lime (8-
year old Baladi cv), Grafted on sour orange rootstock) with the history of root
rot disease. The following treatments were evaluated.
Bio composted agricultural wastes (BCAW) colonized by T. harzianum )
at the rate of 10 % (w/w) of soil.
Composted agricultural wastes (CAW) at the rate 10 % (w/w) of soil.
T. harzianum at the rate of 5% (v/w) of soil.
Topsin .M 70% at the rate of 20 g / tree.
Control (non-treated diseased trees).
One hundred and twenty diseased lime trees showing typical symptoms of
Fusarium dry root rot disease were selected. 10 diseased trees with different
rates of disease severity (1, 2 and 3) were used as replicates for each treatment
as well as control treatment. All soil treatments were applied to soil around
main stem of tree twice per season, first, in spring (March) and the second in
summer (July). After 60 and 90 days from the adding second application a
number of recovered trees and the development of disease severity on diseased
trees were recorded. The development of disease symptoms (severity) on lime
trees was determined and rated on scale from 0-4 rates (0 = healthy plants 4 =
dead plants) according to Morgan and Timmer (1984) and El-Mohamedy
(1998). Percentages of the disease infection and severity after 60 and 90 days
from treatments application were recorded and calculated.