author(s)
Sathish BN, GG Radadia and Abhishek Shukla

abstract
An experiment were carried out during 2017-18 and 2018-19 to evaluate different bio-pesticides against A study on extent of nut damage by coconut eriophyid mite, A. guerreronis was carried out at the coconut plantation of Regional Horticulture Research Station, ASPEE College of Horticulture and Forestry, NAU, Navsari on coconut variety of West Cost Tall during the year 2017-18 and 2018-19. The overall average data on per cent nut damage during two consecutive years revealed that the per cent distribution of nuts in different grades based on nut surface area damaged viz., 19.88 per cent nuts (Grade - 1), 23.27 per cent nuts (Grade - 2), 27.54 per cent nuts (Grade - 3), 18.65 per cent nuts (Grade - 4) and 10.43 per cent nuts (Grade - 5). Whereas, the maximum per cent of damaged nuts (27.54%) was belongs to Grade - 3 damage category (26 to 50 per cent nut surface area damaged) and mean damage grade index was 1.76 (i.e. intensity of nut damage was moderate).