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- E-ISSN Number: 2277-7695
- P-ISSN Number: 2349-8242
- CODEN Code: PIHNBQ
- ZDB-Number: 2663038-2
- IC Journal ID: 7725
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Vol. 12, Issue 9 (2023)
Epidemiological factors responsible for powdery mildew disease in okra, green gram, black gram and wild poinsettia
Author(s):
Anusha Mahendra Nayak, Priya John, Siddu Lakshmi Prasanna and Farooqkhan
Anusha Mahendra Nayak, Priya John, Siddu Lakshmi Prasanna and Farooqkhan
Abstract:
The studies on effect of weather factors on development of disease revealed that the powdery mildew disease index during late kharif season was found higher at 49th SMW of 2019 in okra (88.7%), at 2nd SMW of 2020 in green gram (85.6%) and black gram (82.5%) respectively and in the case of wild poinsettia (98.2%) it was found higher at 8th SMW of 2020. There was a negative correlation between the disease index and all weather parameters except bright sunshine hours in okra and wild poinsettia and wind speed in the case of green gram and black gram, respectively. The multiple linear regression of PDI of powdery mildew in relation to weather parameters and crop age indicated that crop age in okra, minimum temperature and crop age in the case of green gram, black gram and wild poinsettia, respectively were most responsible for the disease development.
The studies on effect of weather factors on development of disease revealed that the powdery mildew disease index during late kharif season was found higher at 49th SMW of 2019 in okra (88.7%), at 2nd SMW of 2020 in green gram (85.6%) and black gram (82.5%) respectively and in the case of wild poinsettia (98.2%) it was found higher at 8th SMW of 2020. There was a negative correlation between the disease index and all weather parameters except bright sunshine hours in okra and wild poinsettia and wind speed in the case of green gram and black gram, respectively. The multiple linear regression of PDI of powdery mildew in relation to weather parameters and crop age indicated that crop age in okra, minimum temperature and crop age in the case of green gram, black gram and wild poinsettia, respectively were most responsible for the disease development.
The aerobiological studies on effect of weather factors on the development of spore load of E. cichoraearum, E. polygoni and Leveillula clavata indicated that more conidial counts were observed during November and December in E. cichoraearum and E. polygoni while it was during November to January in the case of Leveillula clavata.
Viability of conidia of Erysiphe and Leveillula were observed up to 16 and 17 weeks in freeze condition followed by 13 and 15 weeks under tree shade condition. Under field condition, it was noticed up to 11 and 13 weeks and in room temperature viability was up to 10 and 11weeks, respectively.
Pages: 1298-1307 | 197 Views 140 Downloads
How to cite this article:
Anusha Mahendra Nayak, Priya John, Siddu Lakshmi Prasanna, Farooqkhan. Epidemiological factors responsible for powdery mildew disease in okra, green gram, black gram and wild poinsettia. Pharma Innovation 2023;12(9):1298-1307.
Journal code(s)
- E-ISSN Number: 2277-7695
- P-ISSN Number: 2349-8242
- CODEN Code: PIHNBQ
- ZDB-Number: 2663038-2
- IC Journal ID: 7725
Main Menu
Special Issue
Copyright Form
Identifier
The Pharma Innovation Journal
