 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effect of High Temperature on Inhibtion of the Growth of Bacterial Wilt Pathogen (Ralstonia solanacearum) in Soil) ผู้เขียน: Jirasak Kongkiattikajorn, Tanathep Pithayarathsak, Sirichia Thepa สื่อสิ่งพิมพ์:pdf AbstractThis study was carried out to examine the efficacy of heat treatment on soil for the control of bacterial wilt (Ralstonia solanacearum). The viability of Ralstonia solanacearum was tested in both wet and dry soils under simulated elevated temperatures in either constant, cyclic or short temperature regimes. In wet soil, viability was reduced to zero by a constant temperature of 45?C and above for 2 day or a temperature of 60?C for 2 h. Viability of Ralstonia solanacearum was reduced to zero by a 2 h temperature cycle for 2 days at 50?C or 3 days at 45?C. In dry soil at 55?C, a 1-day constant temperature or at 45?C a 2 days 2- h temperature cycle reduced Ralstonia solanacearum viability by 87.5 and 37.5%, respectively. Data on time and temperature relationships on loss in viability of Ralstonia solanacearum in soil could be used to predict efficacy of soil solarization. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Increased Tomato Yields by Heat Treatment for Controlling Ralstonia solanacearum in Soil) ผู้เขียน:Jirasak Kongkiattikajorn, Sirichia Thepa สื่อสิ่งพิมพ์:pdf AbstractPossibities of soil after heat treatment by incubation at high temperature were investigated for controlling Ralstonia solanacearum, the causal agent of bacterial wilt on tomato. A constant temperature of 45?C for 2 day or a minimum temperature of 60?C for 2 h was applied in soil, after which tomato seedlings were grown. The incidence of tomato drop was very low in the heated plots, but a 40-50% loss of tomato to the disease was observed in the control plots (no heat treatment). Reductions in biomass and in the number of tomato seedlings were observed in the non heated treatments, reduced the total bacterial population by 60-97%. The populations of native Ralstonia spp. were reduced from 2.4-7?108 colony forming units (cfu)g-1 to 0-115 cfu g-1. Heat treatment reduced bacterial wilt incidence by 50- 75%. This study presented the report on the efficiency of high temperature treatment on soil against tomato bacterial wilt pathogens. |
 |
 |