National Academy of Agricultural Sciences (NAAS)
|
PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Broccoli (Brassica oleracea var. italica) is a member of ‘Cole crop group’ closely related to cabbage, cauliflower, kale and mustard it belongs to the family Brassicaceae. Alternaria leaf spot caused by Alternaria brassicae is serious disease in broccoli growing areas and occurs as a pre-harvest as well as post-harvest brown to black spots appears on the head of the broccoli. Thyme essential oil was tested in-vitro at different concentrations viz., 0.25%, 0.5%, 0.75%, 1%, and mancozeb 0.1% against radial growth of Alternaria brassicae. The minimum radial growth (mm) at 120 hrs was observed at a concentration of thyme essential oil @ 1.0 % (5.213 mm) followed by thyme essential oil @ 0.75 % (7.517 mm). The maximum percentage inhibition at 120 hrs was observed in thyme essential oil @ 1.0% (94.20%) followed by thyme essential oil @ 0.75% (91.30%) as compared to treated check mancozeb @ 0.0.1% (90%) and untreated check (0.00%) under in-vitro conditions. The microalgae and thyme essential oil were tested under field conditions during Rabi 2019- 2020 for their efficacy against the disease, plant growth & yield parameters. Among the treatments the maximum plant height (cm) at 90 DAT (Days after transplanting) (36.25 cm), maximum number of leaves at 90 DAT (17.25), minimum disease intensity (%) at 60 DAT (21.97 %),maximum head weight (t/ha) (11.41t/ha), maximum root length (cm) (14.04cm) and maximum yield (t/ha) (13.76 t/ha) was recorded in T3 – microalgae @ 4kg/ha + thyme oil @1.0%followed by T2– microalgae @ 3kg/ha + thyme oil @1.0% as compared to untreated check control T0.Higher gross return value (Rs. 2,75,560/ha), net return value (Rs. 1,03,195/ha), and B:C Ratio (2.67) was found in the treatment T3 – microalgae @ 4 kg/ha + thyme oil @1.0% as compared to untreated check control T0 –(1.64).
Citations |
 |
 |
 |
 |
