French bean (Phaseolous vulgaris L.) is a significant food, legume crop utilized as a pulse and green vegetable crop, belongs to family fabaceae. The French bean is a cool-season, day- neutral vegetable that can withstand extreme temperatures. Area, production and productivity on French bean in India (2019-20) were 22.1 Mha, 2226 million Tonnes and 7-10 t/ha. They are high in protein and have a similar texture to meat. Green pods have 1.7 g protein, 0.1 g fat, 4.5 g carbohydrate, 1.8 g fibre, and are high in minerals and vitamins in a 100 g serving. Several diseases affects French bean crop majorly and cause yield loss Alternaria leaf spot (Alternaria alternata), Angular leaf spot (ALS) (Phaeoisariopsis griseola), Bean rust (Uromyces appendiculatus), Anthracnose (Colletotrichum lindemuthianum), Aschochyta leaf spot (Ascochyta phaseolorum) and Cercospora leaf spot (Cercospora canescens). Among them, Alternaria leaf spot of French bean is one of the most severe disease, which is caused by A. alternata in the French bean. An experiment was conducted in the Zaid season to check the efficacy of bioagents against A. alternata on field conditions. Bioagents viz.,Trichoderma viride, Pseudomonas fluorescens, Bacillus subtilis as seed treatment. An untreated replication served as control. Among the treatments, the maximum germination percentage maximum plant height (cm) at 90 DAS , maximum no. of primary branches and secondary branches at 60 DAS was recorded in T4 – T. viride @2.5%+ P. fluorescens @ 2.5% followed by T1 – T. viride @ 5% as compared to untreated check control T0 . The minimum disease intensity (%) at 75 DAS was recorded in T4 – T. viride @ 2.5% + P. fluorescens @ 2.5 %, followed by T1 – T. viride @ 5% as compared to untreated check control T0.
Coriander (Coriandrum sativum L.) is one of the important spice crops of Apiaceae family. Coriander seeds are used as medicine to cure indigestion, dysentery, vomiting as well as cold and like all other green leafy vegetables, its leaves are a rich source of vitamins, minerals and iron. The country's annual production of coriander seeds in the year 2021 was over 822 thousand metric tons cultivated over 2.92 lakh hectares. Alternarial leaf spot of Coriander which is caused by Alternaria alternata is one major disease in the coriander. The Trichoderma viride, Pseudomonas fluorescens, Bacillus subtillis and Garlic extract were tested under field conditions during rabi season 2021 for their efficacy against the disease and growth & yield parameters. Among the treatments the maximum plant height (cm) at 90 DAS was recorded in T2 – Trichoderma viride+ Pseudomonas fluorescens followed by T3 – Pseudomonas fluorescens as compared to untreated check control T0. The maximum number of branches at 45 DAS was recorded in T2 – Trichoderma viride+ Pseudomonas fluorescens followed by T3 – Pseudomonas fluorescens as compared to untreated check control T0. The maximum root length at 90 DAS was recorded in T5– Trichoderma viride+ Bacillus subtillis followed by T2 – Trichoderma viride + Pseudomonas fluorescens as compared to untreated check control T0. The minimum disease intensity (%) at 75 DAS was recorded in T2 – Trichoderma viride+ Pseudomonas fluorescens, followed by T1–Trichoderma viride as compared to untreated check control T0. The maximum yield (q/acre) of onion was recorded T4 –Trichoderma viride +Pseudomonas fluorescens followed by T1 – Trichoderma viride as compared to untreated control T0.
Onion (Allium cepa L.) is one of the important cultivated vegetable crops and can be grown in temperate, tropical and sub-tropical climates. It is the important vegetable and spice crop and known as “Queen of the kitchen”. Area, Production and Productivity on onion in India (2020-21) was 16.54 million ha, 26.92 million Tones and 19.40 t/ha. There are many diseases and pests affecting onion. Among the diseases, majorly purple blotch, downy mildew, Stemphylium blight and basal rot attacks the onion and among the pests, onion thrips, red spider mite, onion fly attacks the onion. Among them, purple blotch of onion is one of the most severe diseases, which is caused by Alternaria porri which causes heavy losses in the onion. The treatments viz., Trichoderma viride, Pseudomonas fluorescens, Bacillus subtilis and neem oil were tested under field conditions against Alternaria porri during Zaid for their efficacy against the growth and disease parameters and an untreated plot will serve as control. At desired interval of days (45,60,75 DAT) readings were taken for growth parameters and disease intensity. Based on single trail, it was observed that among all treatments, seedling treatment with Trichoderma viride + Pseudomonas fluorescens + neem oil @ 5% showed the most significant results with maximum growth parameters and minimum disease intensity results followed by Trichoderma viride + Bacillus subtilis + neem oil @ 5% and the minimum growth parameters and maximum disease intensity was shown in untreated (control) plot.
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