AbstractsBiology & Animal Science

Agriculture is the main occupation in India. Pesticides are the key inputs in newlineagricultural production which control major diseases of crop plants. The use of newlinepesticide is not without controversy due to the destructive effects they cause in crop newlineplants and pollute the soil and water reservoir. newlineIn the present study, an attempt has been made to evaluate the effects of newlineBAAN (systemic fungicide) on eight cultivars of rice (Thanu, B.R.2655, MTU1001, newlineMTU1010, KRH-2, KMR-3R, IET7575, IR30864) with following objectives, newline(i) effect on morphological parameters (fresh and dry weight, shoot and root length, newlinevigour index, % phytotoxicity, tolerance index), (ii) effect on biochemical parameters newline(total protein content, chlorophyll a, chlorophyll b and total chlorophyll content, newlineassay of and#945;- amylase and catalase activity), (iii) effect on physiological parameters newline(nutrient uptake (macro and micro), net photosynthetic rate, stomatal conductance, newlineintercellular carbon di oxide concentration and carbon isotope discrimination among newlineeight cultivars of rice). Three concentrations of fungicide were used during the study newlineViz., lower than recommended dosage (0.1%), recommended dosage (0.2%) and newlinehigher than recommended dosage (0.3%). newlineResults of this work showed that application of BAAN is not beneficial to newlinecultivars like Thanu and B.R.2655 as the fungicide induces a reduction in newlinemorphological, biochemical and physiological parameters studied. newlinev newlineCultivars like KMR-3R and MTU1010 have responded positively to the newlinefungicide application but higher dosage has found to be phytotoxic to these cultivars. newlineHence indiscriminate use of fungicide should be avoided. newlineEven recommended dosage of fungicide has shown weak phytotoxicity in newlinecultivars like KRH-2, MTU1010, IR30864 and IET7575. The results obtained newlinepartially support the use of this fungicide in these cultivars as it has shown slight newlinephytotoxicity.%%%Bibliography p 146-166, Appendix p 167