Research was conducted on rice crop to see the impact of rice bug Leptocorisa oratorius on
yield, quality and crop value at adoptive research station Vehari, Punjab, Pakistan. The studies
showed that L. oratorius attacks on rice plant and produce unfilled grains. During research
process, the infestation level of rice bug was observed on four rice varieties, Basmati-385,
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Basmati-386, Basmati-2000 and Super-Basmati to see the effect of rice bug on rice plant and
percentage of damaged rice plants were also observed. Results have shown that in potential
grain loss, maximum 420 grains were damaged at 6 levels in Basmati-2000 while minimum
were recorded 210 grains/30 days of intervals in Basmati-386. While the effect of bug on
grain yield produced was maximum and 37% unfilled grains with bug?s density and
maximum loss was occurred 11% at level 9 and maximum grains were present 475/m
at 0
levels. Similarly maximum 100 grains weights were found in Basmati-386. Grain % with
feeding sheath was recorded 85% in Basmati-385 and Basmati-2000 while 65% in
Basmati-386 and maximum 95% seed germination was found in Basmati-2000 at 0 levels and
minimum 31% at 9 levels. It was observed that L. oratorius nourished on rice plant and
formed empty and incompletely filled grains. At the same degree of invasion, Basmati-386
and Super-Basmati had greater harvest, less injured grain, and more growth amounts than
Basmati-2000, Basmati-385 in which rice bug were attacked more and these plants allowed
rice bug nourishment. Results have shown that rice bug L. oratorius attacks on rice plant and
nourished on fluid of stem and seed of rice. Rice bug mainly attacks at flowering and milky
stage of spikelets. It was observed that when rice bug attacks on rice plant, 21% of rice yield
reduced by rice bug L. oratorius in calculation to poor grain yield and low development
percentage
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