LUDHIANA: The Punjab Agricultural University (PAU) has issued advisory to the farmers for insect-pest and disease management in pigeonpea (arhar).
As per the survey conducted by the scientists of Punjab Agricultural University, Ludhiana, pigeonpea (arhar) crop is at flower initiation/flowering stage and at some places, even the podding has initiated. The farmers are advised to remain alert for any incidence of pod borers and diseases at this stage of the crop. For this, the farmers are advised to monitor their crop regularly for occurrence of any such pest or disease attack.
At flowering or podding stages, the crop is generally attacked by pod borers, especially spotted pod borer (Maruca vitrata) and gram pod borer (Helicoverpa armigera). Maruca vitrata appears at the initiation of flowering. Full grown larva has a pale body lined by rows of conspicuous black spots on its dorsal surface. Larvae of pod borer damage the flower buds, flowers and green pods. The larvae feed from inside a webbed mass of leaves, flowers, flower buds and pods webbed together with silken threads.
The crop is also attacked by Phytophthora stem blight which is caused by a fungus. The symptoms can be observed on stem and branches of the crop. Brown to black coloured necrotic lesions are produced which later extend to the whole of the stem and further to the branches. Affected plants showing the lesions of disease should be uprooted immediately.
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