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Gupta R.C.,National Horticultural Research and Development Foundation NHRDF | Purushottamn S.,National Horticultural Research and Development Foundation NHRDF | Pandey S.,National Horticultural Research and Development Foundation NHRDF | Gupta R.P.,National Horticultural Research and Development Foundation NHRDF
Pestology | Year: 2013

The field trial was conducted on onion variety Agrifound Dark Red for the management of foliar diseases through preventive spray of fungicides during Kharif, 2010, 2011 and 2012 at Regional Research Station of NHRDF, Karnal, Haryana. The efficacy of systemic and contact fungicides namely Carbendazim+Mancozeb, mancozeb, propineb, chlorothalonil, azoxystrobin, propiconazole, tebuconazole and hexaconazole were tested against foliar diseases of onion viz., stemphylium blight, purple blotch and colletotrichum blight. The pooled data of three years revealed that the lowest stemphylium blight intensity (7.78%) was recorded in preventive sprays of mancozeb @ 0.25% and propiconazole @ 0.1% (7.89%) at 75 days after transplanting. The highest gross yield (177.99 q/ha) and marketable yield (170.16 q/ha) were also recorded in preventive spray of mancozeb @ 0.25% followed by propiconazole @ 0.1% with gross yield (168.36q/ha) and marketable yield (165.88q/ha). The highest stemphylium blight intensity (14.32% & 13.95 %) as well as lowest gross (123.46 & 115.03 q/ha) and marketable yield (114.32 & 106.66 q/ha) was recorded in untreated check and controls with water spray only respectively. The higher cost benefit ratio (1:35.08) was recorded in preventive spray of mancozeb @ 0.25%. The pooled data were revealed that purple blotch and colletotrichum blight disease did not appear during the entire cropping period of onion. The study revealed that preventive sprays of mancozeb @ 0.25% and propiconazole @ 0.1% started after twenty days of transplanting and subsequently repeated at ten days intervals was adjudged better for the management of foliar diseases and increasing yield of onion during Kharif in Karnal region of Haryana. Source


Yadav S.P.,National Horticultural Research and Development Foundation NHRDF | Balla R.,National Horticultural Research and Development Foundation NHRDF | Shukla R.P.,National Horticultural Research and Development Foundation NHRDF | Mishra A.,National Horticultural Research and Development Foundation NHRDF
Pestology | Year: 2013

The monitoring of pesticides residue status was conducted in 10 vegetables namely cauliflower, cabbage, spinach, tomato, okra, brinjal, bottle gourd, bitter gourd and capsicum collected from six different markets of Nasik area during year May-July, 2010. A total of 98 pesticides including organochlorine, organophosphate, synthetic pyrathrids, triazines, Acylamino acid, pyrimidines, triazoles, imidazole, oxazole phthalimide, benzimidazole, carbamates, nicotinoides, dinitrophenol, aliphatic nitrogen, fungicides, morphdine and other groups were screened. A total no. of 60 samples analyzed using laboratory validated method for extraction and quantification on GC MS/MS, LC MS/MS. The results revealed that from 60 samples of vegetables, 11 pesticides were detected in 25 vegetables samples analyzed. Rest 35 vegetables samples were free from the pesticides residues. The range of pesticides residues detected were ranging from 0.004 ppm to 1.76 ppm. Above Maximum Residue Limit (MRL) concentrations of chlorpyriphos was detected in spinach and tomato, cypermethrin was detected in spinach and okra. Though, the MRL levels of all the vegetables are not available but during the studies, it was observed that 4-Bromo-2 chlorphenol, Triazophos and Etrimphos residue contents, seems to be of higher order. The farmers awareness, as well as consumers awareness in this regards needs to be strengthened so as to produce safe vegetables for the consumption of the masses of the country and also to have access to the foreign markets. Source

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