Wheat growers were also asked to regularly monitor their crop to check the incidence of aphid and yellow rust.
"Farmers are advised to give need-based irrigation to wheat," said an advisory issued by Ludhiana based Punjab Agricultural University.
The advisory came as Punjab and Haryana observed rise in minimum temperatures by several degrees above normal in the last few days.
Minimum temperatures today stayed several notches above normal in several areas including Ambala, Hisar, Karnal, Ludhiana, Amritsar and Patiala in both the states.
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An official of Punjab Agriculture department said, "Increase in temperature is not good for wheat crop at this stage and if this situation prolongs, it can cause early crop maturity. Rise in mercury can lead to shriveling of grains and hence there can be yield loss."
Punjab and Haryana-major foodgrain growing states, have been anticipating bumper wheat crop this season. Punjab and Haryana grow wheat at 35 lakh hectares and 25 lakh hectares respectively.