National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The seasonal incidence of fruit borer (Deudorix isocrates) infesting guava was carried out at two locations viz., Horticultural Research Station, Monduri and in guava orchard at Mohanpur, Nadia, West Bengal during 2014 and 2015. During both years, maximum incidence of pest (D. isocrates) was observed in the month of August at both locations with varying weeks of peak periods except during first year (2014) at Mondouri where the peak incidence was recorded in last week of July. Mean incidence of two locations also indicated that July end to August end was the peak activity period of the pest. The correlation studies between fruit borer infestation and weather parameters revealed that minimum temperature, rainfall and minimum relative humidity resulted in significant positive influence on fruit borer incidence. Regression analysis also showed that all weather factors influenced 61.3% variation in the fruit borer incidence. Field screening of 18 guava varieties against the fruit borer during 2014, 2015 and 2016 revealed minimum infestation in Dudhkhaja (3.08%) and Arka Kiran (4.63%), Kohir Round (6.13%), Mohammad Khaja (6.73%), Baruipur Local (7.61%), HissarSurkha (8.86%) and Lalit (10.08%) and maximum infestation in Hissar Safeda(26.4%), China (24.93%), Allahabad Safeda(23.43%), and Sardar (21.61%).
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