The effect of Bavistin fungicide on the population of Azotobacter chroococcum and Rhizobium leguminosarum
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Abstract
The result. of the influence of Bavistin fungicide at recommended (500 ml / h.) and fold recommended dose on the population of A. chroococcum. and R. leguminosarum were found to be fungicide concentration and the period after treatment dependent.
Bavistin at recommended and fold recommended dose induced significant reduction in A. chroococcum population at 3 days and 60 days after application which recorded 53 × 105 cfu/1gm soil , 86 × 105 cfu /1 gm soil and 48 ×105 cfu / 1gm soil 85 cfu / 1gm soil compared with control treatment which recorded 81 × 105 cfu / 1gm soil , 85× 105 cfu / 1gm soil respectively.
Bavistin didn't induce significant reduction in R. leguminosarum at recommended dose after 3days and 60 days of application which recorded 10 × 105 cfu / 1gm soil , 17 × 105 m cfu / 1gm soil as compared to control treatment which recorded 14 × 105 cfu /1gm soil , 18 × 105 cfu / 1gm soil while the fold recommended soil induced significant reduction in bacterial population which recorded 7 × 105 cfu / 1gm soil , 11 × 105 cfu / 1gm soil respectively
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