International Journal of Plant Protection

R. Somu ¹, N. Thammaiah ², M. S. Kulkarni ¹, G. S. K. Swamy ³, V. Devappa ⁴

Affiliations
1 Department of Horticultural Plant Pathology, K.R.C. College of Horticulture (U.H.S.) Arabhavi, Belgaum karnataka, IN
2 Department of Plant Pathology, AICRP on Tropical Fruits, K.R.C. College of Horticulture Arabhavi, Belgaum karnataka, IN
3 Department of Fruits Science, K.R.C. College of Horticulture Arabhavi, Belgaum karnataka, IN
4 Department of Plant Pathology, Horticultural Research Station Arsikere, Hassan Karnataka, IN

Abstract

Roving survey was conducted in major banana growing regions of Karnataka during 2011-12 and it revealed that the disease incidence ranged from zero to hundred per cent. Maximum incidence was recorded on Kadali variety in Bangalore followed by Mysore (Devarasanahalli) (51.0%), Nanjanagudu (48.0%) and Mandya (Bukanakere) (44.0%) on Rasthali and Ney Poovan cultivars. The disease was not observed in Belgaum area. Pseudostem vascular infection was maximum (6.0) in cultivars of Rasthali and Ney Poovan in Nanjanagudu, Devarasanahalli and Bukanakere.

Keywords

Panama Disease, fusarium Oxysporum F. Sp. Cubense, Survey, Banana

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R. Somu ¹, N. Thammaiah ², V. Devappa ³, M. S. Kulkarni ⁴, G. S. K. Swamy

Affiliations
1 Department of Horticultural Plant Pathology, K.R.C. College of Horticulture (U.H.S.) Arabhavi, Belgaum Karnataka, IN
2 Department of Plant Pathology, AICRP on Tropical Fruits, K.R.C. College of Horticulture, Arabhavi, Belgaum Karnataka, IN
3 3Department of Plant Pathology, Horticultural Research Station, Arsikere Karnataka, IN
4 Department of Fruit Science, K.R.C. College of Horticulture (U.H.S.) Arabhavi, Belgaum Karnataka, IN

Abstract

Investigations were undertaken in pot to assess a possible interaction between Panama wilt of banana caused by Fusarium oxysporumf. sp. cubense and burrowing nematode Radopholus similis. The disease incidence was highest in inoculation of burrowing nematode (Radopholus similis) followed by Fusarium oxysporum f. sp. cubense and inoculation of Fusarium oxysporum f. sp. cubense followed burrowing nematode (Radopholus similis) and simultaneous inoculation of Fusarium oxysporum f. sp. cubense and burrowing nematode (Radopholus similis). Plant growth parameters were least in simultaneous inoculation of Fusarium oxysporum f. sp. cubense and burrowing nematode (Radopholus similis).

Keywords

Fusarium Oxysporum F. Sp. Cubense, Radopholus Similis, Interaction

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D. Siddartha ¹, Revanna Revannavar ², R. Somu ¹

Affiliations
1 College of Horticulture, University of Horticultural Sciences, Bagalkot (karnataka), IN
2 Department of Entomology, College of Horticulture, Mudigere (karnataka), IN
3 College of Horticulture, University of Horticultural Sciences, BAGALKOT (KARNATAKA), IN

Abstract

The toxicity of insecticides with bactericide and individual insecticides to test insect was quantified by adopting leaf dip bioassay method and the compatibility was assessed based on the median lethal concentrations(LC50). The results clearly revealed that in some combinations toxicity was enhanced while in others the toxicity was lowered. Among seven insecticides in combination with bactericide, streptocycline tested for efficacy, four insecticides (chlorantraniliprole, flubendiamide, Proton® and profenophos) showed synergistic effect (SF 1.18, 1.07, 1.03 and 1.01, respectively), whereas three insecticides (indoxcarb, novaluron and Hamla®) were antagonistic (SF 0.83, 0.89 and 0.93, respectively) against P. xylostella larvae.

Keywords

Diamondback Moth, Insecticide, Bactericide, Synergism, Antagonism

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