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AN APPRAISAL OF
RESISTANCE OF OLD AND NEW WHEAT GENOTYPES TO RED FLOUR BEETLE (TRIBOLIUM
CASTANEUM HERBST)
M.S. KHANZADA1,
G.H. ABRO1*, T.S. SYED1, S.R. KHANZADA1,
KHALIL A. KHANZADA2, SHAHJAHAN1,
S. D. KHANZADA3 AND AKHLAQ AHMED4
Abstract:
In the present
investigation, 30 varieties of wheat were used to study their resistance
against Red flour beetle, Tribolium castaneum (Herbst).The grains
of all these varieties were obtained from Plant Breeding and Genetics
Division, Nuclear Institute of Agriculture, Tandojam. Experiment was
conducted in the laboratory at 29±2oC and 65±5% R.H. The
standard of the samples of each variety used in the experiment was 1000
grains, kept in plastic jars (15 x 6 cm). Ten pairs of newly emerged
adult flour beetles (both sexes in equivalent numbers) of uniform age
from laboratory stocked culture were released in each jar. The results
were evaluated on the bases of adult population development, percent
grain damage and frass production, revealed that none of the genotype
was completely resistant to the infestation of T. castaneum. All
the varieties suffered losses, but their degree of resistance varied
significantly. On the bases of pest population development, percent
damage and frass production, the least damage was noted in variety
Barani-70 and Bhittai and the highest damage was recorded in T21
and T16; hence these varieties were designated the most
tolerant and the most susceptible varieties, respectively. The
comparative resistance displayed by the wheat varieties, could be placed
in the following order :< Barani-70 < Bhittai <T19 <T14
<T24< T13 < T20 < T9 <
T11 < T15 <T25 < T1< T12<
T8 < T.J.-83 < T22 < T3 <T18
<T10 < T23 <T5 < Marvi-2000 < T17
< Mehran-89 < T6 < T7 < T16 < T21.
1Department of Entomology, Sindh Agriculture University Tandojam,
Pakistan.
2Crop Diseases Research Institute (PARC), University of Karachi, Karachi
75270, Pakistan
3Plant Breeding and Genetics Division, Nuclear Institute of Agriculture,
Tandojam, Pakistan
4Grain Storage Research Institute, PARC, Karachi, Pakistan
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