Author(s):

Sanjay Kumar, Sonali Deole, YK Yadu and D Dash

Abstract:
Among the different dates of sowing the stem borer damage in terms of number of pin holes was lowest (0.33 pin holes/ plant) at 14 DAS. Peak period of pink stem borer infestation (22.38) was observed at 70 DAS. The crop sown 4^th week of July (28/07/2016) has recorded the maximum Leaf Injury Rating (LIR) (3.11). The lowest number of LIR was recorded on 2^nd week of August (1.94). LIR causes due to stem borer observed lowest at 21 DAS and highest at 63 DAS in all dates of sowing. The crop sown 4^th week of July (28/07/2016) has recorded the maximum percent dead hearts (18.67 %) followed by 3^rd week of July (11.11 %). The lowest percent of dead hearts was recorded on 2^nd week of August (5.60 %). Stem borer damage was observed lowest at 28 DAS and highest at 63 DAS in all dates of sowing.

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