Dr. M. RaghuramanDharmendra Kumar2016-09-212016-09-212015http://krishikosh.egranth.ac.in/handle/1/78095The present thesis embodies the results of the investigations made on “Biodiversity of phytophagous mites on certain crops in eastern U.P. and management of brinjal mites” which were carried out in 2010 and 2011 An overview of different acaricides/insecticides during both the years revealed that abamectin and dicofol proved to be the most promising pesticides, followed by propargite, emamectin benzoate and hexithiazox. Bifenthrin and spiromesifen could also be able to reduce the mite population up to 14 DAA, followed by indoxacarb. The neem based pesticide, exhibited lower efficacy in bringing down the mite population during both the cropping seasons. Abamectin (1.8 EC) was most effective against the spider mites up to the 14th day (92.24 per cent reduction over control), which was at par with dicofol (18.5 EC) followed by hexithiozox (5.45EC). Azadirachtin 0.05%, spiromesifen (22.9 SC) and indoxacarb (14.75 SC) were not much effective in suppressing the mite population during both the cropping seasons. The maximum of brinjal was realized in the abamectin (1.8 EC) treated plots during both the years (209.00 and 209.67 q/ha, during 2010 and 2011 respectively), followed by dicofol (1.8 EC) with 204.67 and 207.67 q/ha, respectively during 2010 and 2011. On the basis of yield due to different treatments against phytophagous mite, it was found that the efficacy was in the following decreasing order: abamectin >dicofol >emamectin benzoate >hexithiozox >azadirachtin >spiromesifen >bifenthrin >propargite >indoxacarb. The lowest yield was recorded from untreated control (134.50 q/ha). Additional fruit yield was maximum as abamectin >dicofol >emamectin benzoate >hexithiozox and bifenthrin >azadirachtin >propargite >spiromesifen >indoxacarb. And the same as the value of the additional yield also obtained; whereas the maximum net profit was the recorded from abamectin >dicofol >emamectin benzoate >bifenthrin >hexithiozox >azadirachtin >spiromesifen >propargite >indoxacarb, Whereas the benefit cost ratio (B:C) was as recorded maximum from the azadirachtin >dicofol >bifenthrin >hexithiozox >abamectin emamectinbenzoate >spiromesifen >propargite >indoxacarb were recorded during both the years.enBiodiversity, phytophagous mites and brinjal mites,Morphological characterizationThesis