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 |
Phytophthora disease has been identified as one of the major causes of decline in citrus. It causes the most serious and economically important soil borne diseases to citrus crops. In year 2016 and 2017 soil samples were collected from Thirty eight (38) surveyed nurseries during August to November. Three species of Phytophthora viz. P. parasitica, P. citrophthora and P. palmivora found associated to cause damping off, collar rot and root rot in citrus. In the present studies these three of Phytophthora were isolated by using CMA-PARPH medium from collected soil samples. The occurrence of Phytophthora spp. was recorded in 35 out of 38 surveyed locations, with a range from 3.10 to 24.33 cfu / g of soil in the year 2016 and 2.33 to 24.99 cfu / g of soil in year 2017. Pooled data of infected nurseries indicate propagules in the range of 2.94 to 24.66 cfu/g of soil. The morphological characters like mycelium and its appearance, sporangial papillation and their shapes and presence of chlaymadospores of different isolated species were recorded. Presence of chlamydospores was observed only in P. nicotianae var. parasitica which were present as intercalary with oval shape and thick wall.
Citations |
 |
 |
 |
 |
