Figure 1a:
Leaf galls of C.verum.
Figure 1b:
Subsequent drying up of leaves due to
infestation by gall mite A. doctersi.
Figure 2:
section of gall showing inner growth of
glandular hairs/papillae with different stages of gall mite
A. doctersi of C. verum. (Presl.)
Figure 3:
Scanning Electron Micrograph of A. doctersi of
C. verum
3.2 Population density of A. doctersi
Results of population studies on A. doctersi and influence
of weather parameters during September, 2011 to August,
2012 are represented in Table:1. As the temperature got
increased, there was a gradual increase in total mite
population. During the study period, mite population
attained the peak level in May (75 mites per gall) when
the temperature and R.H were 31.78
o
C and 80.5%
respectively. Results of statistical analysis showed a
positive correlation between the number of mites and
temperature (r=0.576). The mite population experienced a
sudden decline from June to December, with the average
number per gall decreasing from 22 to 17. During this
period intermittent rains were available in the site. A
negative correlation could be depicted between the
number of mites and rain fall (r = -0.182) whereas positive
correlation was recorded between the mite density and
relative humidity (r = 0.237).
Paper ID: SUB15345
1107
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