AbdulvahabShino ShakthiKAU2019-06-102019-06-102004http://krishikosh.egranth.ac.in/handle/1/5810107938PGThe present investigation on Cultural Management of bacterial wilt in hybrid tomatoes was conducted at the Instructional Farm, College of Agriculture, Vellayani, Thiruvananthapuram during November 2003 to April 2004. Three tomato hybrids were raised in a split plot design with three replications. Seven cultural practices and three hybrids susceptible to bacterial wilt along with a control plot with no treatments were carried out to find suitable cultural management practices for control of bacterial wilt in tomato hybrids. Majority of the yield and yield attributes were significantly influenced by the different treatments, hybrids and their interaction affects. Among the treatments, application of Pseudomonas fluorescens isolate P-I showed the highest yield per plant and highest yield per plot. This treatments also gave the highest plant survival and lowest incidence of bacterial wilt as well as low population count of Ralstonia solanacearum in soil. Application of lime as basal also showed result comparable to that of Pseudomonas fluorescens isolate P-I application. Among the hybrids highest yield per plant and yield per plot was shown by COTH-1. This hybrid also showed highest percentage of plant survival and lowest incidence of bacterial wilt. The worse performing hybrid was Naveen showing poor yield, plant survival, high incidence of bacterial wilt and lowest yield. Fruits per plant, yield per plant and yield per plot showed considerable variation among the treatment combination. The interaction between P. fluorescens isolate P-I and hybrid COTH-1 showed the highest fruits per plant. This treatment combination also showed the highest yield per plant and also per plot yield. The highest plant survival and lowest bacterial wilt incidence was shown by the treatment combination T6V¬3. Their performance was more or less on par with other treatment combination like T1V¬3, T3V¬3 and T7V¬3. The population density of bacteria in the experimental plot also showed a low value for the above mentioned treatment combinations. In the present study the highest yield/plot was recorded for treatment combination T6V¬3 with a high benefit : cost ratio of 3.33 followed by T7V¬3 with a benefit : cost ratio of 2.70.ennullThesis