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|Title: ||Studies on Susceptibility of Different Pulse grains to Callosobruchus chinensis (L.)(Coleoptera:Bruchidae) under Laboratory Condition|
|Authors: ||MARTHA, MEGERSSA|
|Advisors: ||Dr. Emana Getu|
|Copyright: ||Jun-2010 |
|Date Added: ||10-May-2012 |
|Abstract: ||A study was initiated with the objective to understand the susceptibility of different pulse
grains to Callosobruchus chinensis, and then screen the resistance of different pulses to
C. chinensis by evaluation of some biological parameters. All Laboratory Experiments
were conducted at a controlled temperature of 27 ± 2°c and 40 ± 5 % R.H. In all the
Laboratory Experiments 1-3 days old adults were used.
Six different pulses were screened for their relative resistance by exposing the seeds to
the adults of the pest in controlled Laboratory conditions. The results indicated that
preference of oviposition by C. chinensis varied among the treatments. The highest
preference of oviposition was recorded on chick pea, faba bean and grass pea while on
field pea and lentil least, and null on haricot bean. The treatments also differed in their
suitability to the development of the pest since there were significant differences in the
number of adult emergence and developmental period.
The treatments also varied in resistance and the variation was due to both non preference
for oviposition and larval antibiosis. Field pea and faba bean were more resistant to the
attack of C. chinensis and this was manifested in terms of a lowered fecundity of the
females and number of adult emergence together with prolonged developmental period
on field pea and lower number of adult emergence and prolonged developmental period
on faba bean..
Germinations were inhibited in treatments with higher number of adult emergence where
as 100% germination were recorded on the treatments with lower number of adult
emergence and on which oviposition was deterred and also the oviposition deterrence of
C. chinensis on haricot bean was due to the fact that this treatment may not a host for C.
|Appears in:||Thesis - Biology|
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