G. P. Uma ¹, A. Prabhuraj ¹, M. B. Patil ¹

Affiliations
1 Department of Agricultural Entomology, College of Agriculture, UAS, Raichur 584 102, Karnataka, IN

Abstract

Antibiotic and antagonistic effects of primary and secondary forms of Photorhabdus luminescens, a symbiotic bacterium of an entomopathogenic nematode Heterorhabditis indica (RCR) were investigated in vitro against plant pathogens and beneficial microorganisms. An inhibition zone assay on potato dextrose agar (PDA) medium revealed that the primary form completely inhibited all plant pathogenic fungi, viz., Aspergillus flavus, Rhizoctonia solani and Fusarium solani and tested secondary form completely inhibited the growth of F. solani and partially inhibited A. flavus and failed to inhibit R. solani. However, dual culture assay on nutrient agar (NA) in both forms completely inhibited the growth of the bacterial pathogen, Xanthomonas punicae. The forms of P. luminescens did not inhibit the mycelial growth of entomopathogens viz., Metarhizium anisopliae, Verticillium lecanii and Nomuraea rileyi but inhibited the growth of bacterial bioagents Rhizobium sp. and Pseudomonas fluorescens. The present study indicates that P. luminescens can be effectively used in the management of these plant pathogens.

Keywords

Antifungal, Antibacterial, Entomopathogens, Heterorhabditis, Photorhabdus luminescens, Plant Pathogens.

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Anand Katti ¹, J. S. Awaknavar ¹, D. N. Kambrekar ², M. B. Patil ³, S. B. Patil ⁴

Affiliations
1 Department of Agricultural Entomology College of Agriculture, Bijapur UAS Dharwad, IN
2 Agricultural Entomology Regional Agricultural Research Station, Bijapur, IN
3 Department of Agronomy, College of Agriculture, Bijapur, IN
4 Department of Agricultural Extension Education, College of Agriculture, Bijapur, IN

Abstract

The biology of Amphibolus venator was studied on Corcyra cephalonica under laboratory conditions. The egg period was 16.33±1.24 days, with the range of 15-18 days. There were five nymphal instars in Amphibolus venator. The nymphal period for I, II, II, IV and V instar lasted for 23.33±3.14, 30.83±6.06, 38.33±9.70, 40.16±3.67 and 40.00±4.63 days, respectively. The total developmental period was 172.65±15.50 days. The longevity of female was 65.83±2.4 days with range of 63 to 68 days and male was 59.33±2.49 with range of 57 to 62 days; the fecundity per female was 210 with range of 200 to 220 eggs.

Keywords

Amphibolus venator, Biology, Corcyra cephlonica, Reduviid Bug.

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Anand Katti ¹, J. S. Awaknavar ¹, D. N. Kambrekar ¹, M. B. Patil ¹, S. B. Patil ¹

Affiliations
1 Department of Agricultural Entomology College of Agriculture, Vijayapur UAS Dharwad, IN

Abstract

The survey and surveillance was carried out during 2013 at the seed unit (central store) College of Agriculture Vijayapur, Agricultural Produce Market Committee (APMC) market, Food Corporation of India (FCI) and State Warehousing Corporation (SWC) in Vijayapur, houses at monthly intervals for three months, (July to December 2013) and farmers in five taluks (Indi, Sindgi, Vijayapur, Basavan bagewadi and Muddebihal) in Vijayapur district. During the survey and surveillance, natural enemies found were Amphibolus venator on Tribolium castaneum and Corcyra cephalonica in sorghum and pearl millet, Xylocoris flavipes on T. castaneum, Sitotroga cerelella and Callosobruchus chinensis in sorghum, wheat and bengal gram respectively. Dinarmus sp. on Callosobruchus chinensis in pulses like chickpea, redgram, black gram and moth bean.

Keywords

Amphibolus venator, Dinarmus Sp., Survey, Surveillance and Xylocoris flavipes.

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