ประสิทธิภาพของผงเชื้อแบคทีเรียปฏิปักษ์ ในการควบคุมโรคถอดฝักดาบของข้าวในแปลงนา

Abstract

Efficiency of powder formulation of antagonistic bacteria to control rice bakanae disease was studied in farmer field at Amphoe muang-phayao, Phayao Province in wet season 2009 and 2010. The experiment was designed as RCB (Randomized Complete Block) with 4 replications and 8 treatments. The treatments were 1)control treament 2)antagonistic bacteria BAK-016 3)antagonistic bacteria BAK-088 4)antagonistic bacteria BAK-102 5)antagonistic bacteria BAK-117 6)antagonistic bacteria BAK-131 7)wood vinegar and 8) mancozeb+ carbendazim.The result from wet season 2009 found that naturally-infected RD6 seeds bacterized with BAK-131 and BAK-088 had bakanae incidence 8.9% and 9.7%, respectively, comparable to 8.2% of the mancozeb+carbendazim treatment and 10.9% of control treatment. For the other isolates,BAK-102,BAK-016 and BAK-117 had bakanae incidence 12.6%, 12.7% and 12.9%, respectively. For rice yield, treatment of BAK-088 gave the highest of rice yield 596 kilogram per rai more than chemical treatment which gave rice yield 556 kilogram per rai. The result from wet season 2010 revealed that at the seedling stage, rice seed bacterized with BAK-016 and BAK-131 showed bakanae incidence 0.31% and 0.40%, respectively, while the mancozeb+carbendazim and control treatment showed bakanae incidence 0.03% and 1.48%, respectively. At the tillering stage, seed bacterized with BAK-131 showed the most effective to control disease which had bakanae incidence 1.30% less than the mancozeb+carbendazim and control treatment which had bakanae incidence 1.47% and 3.87%, respectively.Treatment of BAK-102 gave the highest rice yield 647 kilogram per rai more than mancozeb+carbendazim and control treatment which gave 516 and 547 kilogram per rai, respectively.