Peningkatan Infektivitas Jamur Entomopatogen, Beauveria Bassiana (Balsamo) Vuill. Pada Berbagai Bahan Carrier Untuk Mengendalikan Hama Penggerek Bonggol Pisang, Cosmopolites Sordidus Germar Di Lapangan

Abstract

. Hasyim, A. 2007. Enhancing Infectious Capacity of Entomopathogen Fungi, Beauveria bassiana (Balsamo) Vuill. Using Various Carrier Materials in Controlling Banana Corm Borer, Cosmopolites sordidus Germar under Field Condition. This experiment was conducted at Baso banana farmer field, Agam District from October 2002 to February 2003. The objectives of these studies were to know the infectious capacity of entomopathogen fungi, Beauveria bassiana (Balsamo) Vuillemin using various carrier materials and to know the best trapping model in controlling banana corm borer Cosmopolites sordidus Germar. A randomized complete design with 7 treatments and 4 replications were used in this study. The treatments consisted of 6 carriers, i.e. corn powder, talc, rice powder, maizena powder, vegetable oil, water, and control (dry conidia). Amount of 100 g or 100 ml mixture of B. bassiana were distributed by hand or sprayed with water on cut surface of the banana corm then covered by sliced banana pseudostem. Futhermore, 3 types of trapping model i.e (1) banana corm + pseudostem, (2) banana corm, and (3) pseudostem were used with 6 replications to find out the best trapping design. The results showed that rice powder was the best carrier for delivery of B. bassiana and caused highest mortality of banana corm borer. On the other hand, vegetable oil, water, and without carrier material caused the lowest mortality of banana corm borer. The highest mortality of adult banana weevil borer, C. sordidus reached 95% when weevil exposure using rice powder carrier on corm and pseudostem. While the B. bassiana exposure using liquid carrier such as vegetable oil, water carrier, and without carrier material on corm and pseudostem caused the lowest mortality of C. sordidus of 72, 75, and 70% respectively. The highest mortality of banana corm borer caused by B. bassiana was found in the treatment with rice powder as a carrier material and pseudostem trapping design. The results demonstrated that powder as a carrier could enhance the infectious capacity of entomopathogenic fungus B. bassiana against banana weevil borer, C. sordidus under field conditio