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คณะเกษตรศาสตร์ มหาวิทยาลัยเชียงใหม่

 

  ISSN: 0857-0841 (Print)
  ISSN: 2630-029X (Online)
 


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"Article Journal of Agriculture"
Volume 34 Issue 2 May 2018 , ISSN 0857-0841
Title. : Efficacy of Some Carriers to Preserve Metarhizium anisopliae MRT-PCH 048 for Controlling Brown Planthopper
Author : Nuansiri Sribunme, Weerathep Pongprasert, Sawai Buranapanichpan, Pabhop Sinchayakul and Jiraporn Kulsarin
Page : 227-234
index word : เชื้อราเขียวเมตาไรเซียม(Metarhizium anisopliae) สารพา(carriers) ดินอินทรียวัตถุ(soil organic matter) ทราย(sand) ดินสอพอง(white clay filler) ดินขาว(kaolin)
Abstract:
The objective of this research was to study on the efficacy of 5 carriers: soil organic matter, sand, white clay filler, Lop Buri kaolin, and Lampang kaolin to preserve Metarhizium anisopliae MRT-PCH 048 for controlling brown planthopper, Nilaparvata lugens (Stål). The total of 10 ml of M. anisopliae MRT-PCH 048 conidia suspension at the concentration of 108 conidia/ml was mixed with 300 grams of each carrier and stored at 25°C for 6 months. The completely randomized design with 3 replications was applied. Viability of M. anisopliae MRT-PCH 048 preserved in each carrier was determined in each month and the efficacy of those to control brown planthopper was evaluated after 6 months of preservation. The result found that soil organic matter and sand were the best high efficacy carriers to preserve M. anisopliae MRT-PCH 048 for 6 months. However, the high mortality of brown planthopper (98-100%) in 5 days after contacting to M. anisopliae MRT-PCH 048 preserved in all carriers with median lethal time (LT50) at 2.03-2.57 days was found.
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