Study on Mass Production of Beauveria bassiana (Bals.) Vuill. for the Management of Rice Hispa, Dicladispa armigera (Olivier)
Cutting-edge Research in Agricultural Sciences Vol. 11,
26 June 2021
,
Page 100-107
https://doi.org/10.9734/bpi/cras/v11/9772D
Abstract
Rice hispa D. armigera is one of the most important constraints to crop production globally. It attacks the vegetative stages of summer rice causing 35-65% loss and post flooded transplanted rice causing 100% loss in yield throughout Assam and hence it is regarded as one of the major limiting factors in rice production in Assam. Beauveria bassiana (Bals.) Vuill. is a naturally occurring potent entomopathogenic fungus which has been successfully utilized for controlling many insect pests of rice including rice hispa. For developing a good formulation, Beauveria bassiana (Bals.) Vuill (Strain AAU-09) is mass cultured in the potato broth, rice gruel, coconut water, rice husk, sawdust and rice bran. It was seen that amongst the solid media ,rice husk in addition of 2% dextrose was the best in terms of spore production (6.25 x 107 conidia/ml) and pathogenecity (86.67%) to Dicladispa armigera (Olivier) (Coleoptera: Chrysomelidae) adults. Likewise, amongst the liquid media potato broth supplemented with synthetic chitin (2%), dextrose (2%) and peptone (2%) supported maximum spore production. Chitin is essential not only for spore production but also increasing the power of penetrating on cuticle.
- Rice hispa
- entomopathogenic fungi
- Beauveria bassiana
- mass production
- liquid and solid media
- pathogenecity