Validation of degree day based forewarning model of mustard aphid in Bundelkhand agro-climatic zone of Madhya Pradesh
DOI:
https://doi.org/10.54386/jam.v14i1.1388Keywords:
Aphid population, growing degree days, mustard, forewarning modelAbstract
To validate the temperature based aphid forewarning model of Chakravarty and Gautam (2002), data on aphid population were collected from mustard crop grown on farmer’s field during two rabi seasons of 2009-10 and 2010-11 in Tikamgarh district of Bundelkhand Agro-climatic zone. The growing degree day (GDD) was calculated from 1st to 25th January in both the seasons. It was observed that GDD accumulation from 1st to 15th January in both the seasons has capability to forewarn the peak aphid population in Bundelkhand Agro-climatic zone. The correlation coefficients between maximum, minimum and mean temperature and aphid population were found to be marginally higher in case of late sown conditions. The rainfall affected aphid population but it was not significantly related with aphid population.
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