S. H. Ramanagouda ¹, A. S. Vastrad ¹, T. C. Narendran ², K. Basavanagoud ¹, Viraktamath Shashidhar ¹

Affiliations
1 Department of Agricultural Entomology, University of Agricultural Sciences, Dharwad, 580005, Karnataka, IN
2 T. C. Narendran Trust for Animal Taxonomy, Calicut, Kerala, IN

Abstract

Roving survey was conducted during 2010-11 to assess impact of native parasitoids on eucalyptus gall wasp in Belgaum, Dharwad, Haveri, Davangere, Chitradurga, Tumkur and Bengaluru Rural districts of Karnataka, India. It was observed that the gall incidence declined drastically since its outbreak in 2007 due to the activity of native parasitoids. Activity of native parasitoids was more in southern districts. Among the native parasitoids Megastigmus dharwadicus Narendran et al was the most dominant. The eucalyptus gall wasp which had become a production constraint during 2007 threatening the productivity of paper and pulp industry is efficiently kept under check by the native parasitiods.

Keywords

Eucalyptus Gall Wasp, Leptocybe invasa, Megastigmus dharwadicus, Aprostocetus gala.

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T. C. Narendran ¹, O. K. Remadevi ², Raja Muthukrishnan ², C. Abdullatheef ²

Affiliations
1 Systematic Entomology Laboratory, Department of Zoology, University of Calicut, Calicut, 673 635, Kerala, IN
2 Institute of Wood Science & Technology, Bangalore, 560 003, Karnataka, IN

Abstract

Cyrtophagoides ghooubori Narcndran gen. & sp. nov. is described as a parasitoid of the Ghoon borer, Dinoderus sp., of Bamboo in Karnataka, India and compared to related genera. Heydonia indica Narendran (Pteromalidae) is newly reported from the tunnels of Dinoderus sp. and Dendrocalamus strictus (Rosch,) (Pteromalidae) is newly reported from India.

Keywords

Cyrtophagoides gliooubori, Heydonia, Dinoderus, Dendrocalamus.

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R. K. Gupta ¹, T. C. Narendran ²

Affiliations
1 Division of Entomology, Sher-e-Kashmir University of Agricultural Sciences and Technology Jammu, FOA, Udheywalla, Jammu, 180 002, J & K, IN
2 Department of Zoology, University of Calicut - 673635, Kerala, IN

Abstract

Three species of braconid parasitoids viz, Glyptapanteles agamemnonis Wilkinson, Meteorus sp. and Cotesia ruficrus (Haliday) were recovered from the field collected larvae of Spilosoma obliqua Walker feeding on cultivated Vigna mungo and wild weeds, Xanthium strumarium and Parthenium hysterophorus during kharif 2002 and 2003 in Jammu (J & K). Besides, the prevalence of one ichneumonid parasitoid Agathis sp. and viral disease (Nucleopolyhedrovirus) was also noticed. Meteorus sp. Was considered as most promising parasitoid of this pest with a maximum parasitizatiou of 77.0 percent. Nevertheless, G. agamemuonsis is reported for the first time on S. obliqua in India. While, G agamemuonsis was recovered from the larvae feeding on all the three hosts viz Vigna mungo, Parthenium hysterophorus and Xanthium strumarium, Meteorus sp. was never recovered from P. hysterophorus. However, both these parasitoid co-existed in nature and found together attacking 3-4^th instar larvae from September to October (37-43 SW) with a peak activity within a minimum temperature range of 14.0 to 18.0°C. The natural parasitism by these parasitoids did not reveal significant correlation with aboitic factors, but the relationship between their respective K-valucs and larval density fit into density dependent model K = aN^b. However, C. ruficrus and Agathis sp. were noticed in later season when the mean minimum temperature reached below 10°C. The behaviour and developmental biology of all the three braconid parasitoids of S. obliqua is described.

Keywords

Cotesia ruficrus, Developmental Biology, Field Parasitism, Glyptapanteles agamemnonis, Meteorus sp., Spilosoma obliqua.

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