Bio-agents against alternaria

The present study was aimed for determining an effective management with botanicals and bio-agents on Alternaria leaf spot of cabbage.

6p chauchaungayxua10 19-03-2021 15 2   Download

The yield losses in the range of 48-80 per cent due to early blight (Alternaria solani) damage in tomato were reported from India, Canada, USA and Nigeria (Basu, 1974; Datar and Mayee, 1984; Mathur and Shekhawat, 1986; Sherf and MacNab, 1986; Gwary and Nahunnarao, 1998 and Pandey and Pandey, 2002). The annual economic yield losses due to early blight have been estimated at 79% (Adhikari and Panthee, 2017).

8p chauchaungayxua11 23-03-2021 14 2   Download

In vitro evaluation of three contact and five systemic and two combination was carried out under laboratory condition in 2018-19 at Department of Plant Pathology, College of Horticulture, Mysuru by using Potato Dextrose Agar medium (PDA) as basal medium and six biocontrol agents were evaluated through dual culture technique. The result revealed that, there was significant difference among the fungicides in inhibiting the radial growth of the A. solani.

7p trinhthamhodang1216 19-11-2020 13 1   Download

Early blight is potentially destructive disease in tomato occurring on the oldest leaves as small, brownish which are due to foliar blight disease and it was caused by a foliar fungal pathogen Alternaria solani. The disease causes considerable yield as well as post-harvest losses. A. solani produced blackish, fluffy mycelium with septate, beaked conidia on PDA Eight plant extracts and four biocontrol agents were evaluated following poison food technique and dual culture.

6p quenchua6 15-06-2020 7 1   Download

Biotic and abiotic stresses are major constraints in the production of groundnut. Among biotic stresses apart from bacterial and viral diseases, many fungal diseases are of economic importance. The major fungal diseases are Early leaf spot (Cercospora arachidicola), Late leaf spot (Cercosporidium personatum), Rust (Puccinia arachidis), Botrytis blight (Botrytis cinera), Aflarot/Yellow mould (Aspergillus flavus), Damping off (Pythium spp.

7p nguathienthan5 04-06-2020 16 0   Download

A total of fifteen fungicides and four bioagents were tested for their efficacy under in vitro conditions against Alternaria cucumerina. Among fungicides tested, propiconazole gave maximum inhibition (100.00 %) of radial mycelial growth followed by hexaconazole, captan+ hexaconozole and tebuconozole + trifloxystrobin by recording mean per cent inhibition of 98.74, 95.42 and 94.78 per cent respectively.

8p trinhthamhodang4 22-03-2020 9 1   Download

Early Blight of potato is caused by Alternaria solani (Ell. and Mart.) Jones and Grout is one of the most serious diseases of potato. Several management practices have been adopted so far to minimize the disease. But in present investigation based on laboratory and glass house condition revealed that soil application with Farm Yard Manure (FYM) and tuber seed dressing with bio-formulation provided higher germination, excellent growth as well as protection against early blight. The maximum germination percent is 83.33 and minimum germination inhibition percent is 16.

6p chauchaungayxua3 07-02-2020 15 1   Download

Alternaria leaf blight of tomato caused by Alternaria solani is a soil inhabiting and airborne pathogen responsible for considerable loss in tomato production. In the absence of resistant cultivars, the use of fungicides and biocontrol agents to control the disease is one exercise training. When there is an epidemic outbreak for some reason, perhaps the use of fungicides are one of the best options available. These fungicides must be used judiciously according to the need, type of body involved and availability of new fungicides.

11p chauchaungayxua3 07-02-2020 13 2   Download

The present study was carried out to find the integrated management of early blight of tomato (Lycopersicon esculentum Mill.) caused by Alternaria solani. Tomato (Lycopersicon esculentum Mill.) is an important vegetable crop which is grown all over the world. Early blight of tomato, caused by Alternaria solani is one of the most important diseases in tomato. Two fungicides i.e. Mancozeb 75 WP and Hexaconazole 5 EC at different concentrations (0.1%, 0.2% and 0.3%), two bio-agents viz., Trichoderma harzianum and T. koningii and two botanicals i.e.

9p nguathienthan2 26-12-2019 14 0   Download

Onion (Allium cepa L.) is the important vegetable crop. Under favourable condition onion is attacked by various diseases. Out of which, purple blotch is caused by Alternaria porri and is one of the predominant disease of onion. In the present studies, efficacy of bioagents, botanicals and fungicides were tested against Alternaria porri in vitro and toxigenic potential of Alternaria porri. Among the fungicides, Thiram+Carboxin and Propineb (0.3%) has shown 100% mycelial inhibition of Alternaria porri. Maximum mycelial inhibition of Alternaria porri was observed with Ocimum sanctum (60.

8p nguaconbaynhay1 08-12-2019 27 2   Download