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![Malattia delle macchie fogliari della cipolla Alternaria alternata (Fr.) Keissler]( "Malattia delle macchie fogliari della cipolla Alternaria alternata (Fr.) Keissler")
Malattia delle macchie fogliari della cipolla Alternaria alternata (Fr.) Keissler29,99 €![Blattfleckenkrankheit der Zwiebel Alternaria alternata (Fr.) Keissler]( "Blattfleckenkrankheit der Zwiebel Alternaria alternata (Fr.) Keissler")
Blattfleckenkrankheit der Zwiebel Alternaria alternata (Fr.) Keissler43,90 €![Doença da mancha da folha da cebola Alternaria alternata (Fr.) Keissler]( "Doença da mancha da folha da cebola Alternaria alternata (Fr.) Keissler")
Doença da mancha da folha da cebola Alternaria alternata (Fr.) Keissler29,99 €![Pqtnistost' list'ew luka Alternaria alternata (Fr.) Keissler]( "Pqtnistost' list'ew luka Alternaria alternata (Fr.) Keissler")
Pqtnistost' list'ew luka Alternaria alternata (Fr.) Keissler29,99 €![Maladie des taches foliaires de l'oignon Alternaria alternata (Fr.) Keissler]( "Maladie des taches foliaires de l'oignon Alternaria alternata (Fr.) Keissler")
Maladie des taches foliaires de l'oignon Alternaria alternata (Fr.) Keissler29,99 €![Chrysanthemum leaf blight caused by Alternaria alternata (Fr.)Keissler]( "Chrysanthemum leaf blight caused by Alternaria alternata (Fr.)Keissler")
Chrysanthemum leaf blight caused by Alternaria alternata (Fr.)Keissler36,99 €![Alternaria leaf spot of cauliflower caused by Alternaria brassicae]( "Alternaria leaf spot of cauliflower caused by Alternaria brassicae")
Alternaria leaf spot of cauliflower caused by Alternaria brassicae36,99 €
The leaf spot disease of onion caused by Alternaria alternata (Fr.) Keissler is the most serious one. The disease causes extensive damage to bulbs as well as seed crop. In view of the destructive nature of leaf spot of onion, the present investigation was planned to find out the effective disease management practices. Potato dextrose agar and host leaf decoction agar medium proved the best for growth and spore production by the fungus followed by oat meal agar, Czapeck's (Dox) agar and Richards' agar medium. Neem leaf and dhatura showed the maximum fungal growth inhibition and sporulation. While Trichoderma harzianum and T. viride to were proved to be the best antagonist against the pathogen. In vitro screenings Hexaconazole (Contaf 5 EC) was found the most effective and inhibited cent per cent growth of A. alternata even at 500 ppm concentration. Under field condition the minimum disease was recorded in foliar application of Hexaconazole (0.05 %).