3. Results
3.1 Seasonal Phenology of the Gall Leaf Under
Natural Conditions
The results of studies on the seasonal phenology and
population dynamics of A. doctersi on C. verum
performed during January 2012- December 2012 are
represented in Table 1
. During January gall size (2.1mm)
and percentage of damage (12.57%) was found
minimum
and the average temperature and R.H during this period
was 29.1
o
C and
70%
respectively. Then the percentage of
damage and gall size gradually increased since January
and reached the peak level during May (62.5% and 3mm
respectively) when the average maximum temperature was
30.45
o
C and R.H 80.5%. During this period, galls were
found covering the entire leaf area, often fused to form
irregular massive structures on the entire laminar area
including the midrib, veins and vein lets (Fig: 1a). It was
further observed that during this period, the average
number of different stages of A. doctersi (Fig.2) was 75
per gall. The total rain fall recorded during this period was
63.3 mm. From June onwards, the % of damage (53.06%)
decreased gradually and in December reached the
minimum level of 13.16%. During this period the gall size
also got reduced gradually. There was a positive
correlation between the population of the mite and the %
of damage (r=0.63). A positive correlation was also
recorded between the gall size and % of damage (r=0.89).
Dostları ilə paylaş: | 
