RICE IN ANDHRA PRADESH - Rice Knowledge Management Portal

RICE IN ANDHRA PRADESH
Stem borer ( Scirphophaga incertulas) a major pest of rabi season but also occurs in kharif season. Its
damage manifests in the form of dead heart at tillering phase and white ear at grain filling stage. Yield loss
due to this pest was reported to be 10 to 50%.
Leaf folder (Naphalocrosis medinalis) incidence will be seen in shade areas and also in fields where
more nitrogenous fertilizers were applied. Its intensity is more under humid climate at boot leaf stage. Larva
after hatching from the egg folds the leaves longitudinally and feeds within. In case of severe infestation the
leaf margins and tips dryup.
Rice hispa (Dicladispa armigera) is a minor pest but some times attains status of a major pest. Both
adults and grubs feed on leaves. In severe epidemics, leaves dry up and the crop gives scorched appearance.
Gundhi bug (Leptocorisa oratorius and L. acuta) some times appears in epidemic form and causes severe loss.
The adults and nymphs suck milk from the developing grains and results formation of black spot and illfilled
as wellas chaffy grains.
In the recent past panicle mite (Staenotarsonemus spinki) has attained has an important pest
particularly in telangana region in kharif season and in rabi in coastal Andhra Pradesh. Panicle mite causes
paralle rust like streaks near the leaf mid rib and brown to black discolouration on leaf sheath of boot leaf.
Microscopic mites suck the sap from the developing panicles, eat pollen. Desication of pollen grains leads to
spikelet sterility,partial filling of grains and due to scraping discolouration of grains takes place which fetches
less price in the market and such grain results in to more brokens at the time of milling.
Rice thrips(Stenchaetothrips biformis) is a minor pest and occurs in rainfed rice and
also in early transplanted rice crop. Both nymphs and adults suck sap from leaves causing initially yellowish
streaks on leaves, later the leaves curl longitudinally from the margins inwards leading to sharply pointed tips
resembling that of needles, which finally wither. Infestation at panicle stage causes illfilled grains or sterility.
Diseases :
Blast (Pyricularia oryza) is one of the important disease of rice and it appears at nursery as well as
main field. It appears as leaf blast, nodal blast and neck blast .In Andhra Pradesh the disease occurs both in
kharif as well as in rabi seasons. Another important disease is sheath blight(Rhizoctonia solani) . The disease
reduces the vigour of the plant increases the percentage of empty grains in the panicle and also results in to
ill filled grains. Under high intensity disease spreads up to flag leaf resulting in to death of the plant.
For more Information contact: Visit Rice Knowledge Management Portal http://www.rkmp.co.in
Rice Knowledge Management Portal (RKMP)
Directorate of Rice Research,
Rajendranagar, Hyderabad 500030. Email: naiprkmp@gmail.com, pdrice@drricar.org, shaiknmeera@gmail.com
Ph: 91-40-24591218, 295 Fax: 91-40-24591217
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