By: Sudjarwo, Herminanto, A. Agnanto, and L. Ardiyanto
Faculty of Agriculture UNSOED
ABSTRACT
A study has been carried out to know pests, natural enemies, and their control on rice planted in rice-fish system at Beji, Purwokerto. Results showed that pests in the rice-fish system were stem borers, leaf folders, case worms, gall midges, brown planthoppers, black bugs, and rats. The leaf folder on generative phase of the plants performed the highest attack intensity up to 26.6%. Predators found were spiders, the lady beetle Verania spp., and Paederus fuscipes. Verania spp. dominated its existence on rice. Positive impact of the rice-fish culture is its reduction in using chemical pesticides when compared with the monoculture rice culture .
Key words: Plant pests, predators, rice-fish system, and insecticide utilization.
Rabu, 07 Juli 2010
GROWTH OF THE FUNGUS Beauveria bassiana VUILL. ON CORN EXTRACT MEDIUM AND ITS EFFECTIVENESS TO BROWN PLANTHOPPER
By: Endah Irmayanti, Herminanto, and Eko Pramono
Agrotechnology Study Program Faculty of Agriculture UNSOED
Email: hermin06@gmail.com
ABSTRACT
A research has been conducted to know effects of corn extract medium on sporulation and viability of the fungus B. bassiana and its effectiveness for controlling the brown planthopper Nilaparvata lugens. The results performed that propagation of the fungus B. bassiana in the liquid medium of corn extract harvested in a week produced 2.33 x 10^13 conidia/ml, whereas in the solid medium harvested in a month produced 1.15 x 10^13 conidia/ml. The viability of the fungus living in such liquid medium was greater than in the solid medium. This fungus living in the liquid medium could kill the target pest up to 52.50% at the field condition. The last nymphal instar of the pest seemed to be the most vulnerable to the entomopathogenic fungus.
Key words: Beauveria bassiana, brown planthopper
Agrotechnology Study Program Faculty of Agriculture UNSOED
Email: hermin06@gmail.com
ABSTRACT
A research has been conducted to know effects of corn extract medium on sporulation and viability of the fungus B. bassiana and its effectiveness for controlling the brown planthopper Nilaparvata lugens. The results performed that propagation of the fungus B. bassiana in the liquid medium of corn extract harvested in a week produced 2.33 x 10^13 conidia/ml, whereas in the solid medium harvested in a month produced 1.15 x 10^13 conidia/ml. The viability of the fungus living in such liquid medium was greater than in the solid medium. This fungus living in the liquid medium could kill the target pest up to 52.50% at the field condition. The last nymphal instar of the pest seemed to be the most vulnerable to the entomopathogenic fungus.
Key words: Beauveria bassiana, brown planthopper
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