Vol. 9(1), pp. 11-15. October, 2021. 

ISSN: 2384-616X

https://doi.org/10.14662/arjb2021030

 

Full Length Research

 

Abstract

Inorganic control of Phomopsis leaf blight of Jatropha curcas was carried out to determine the Pathogenicity of the isolated organisms and establish the most appropriate fungicide(s) and rate(s) for the control of the diseases. The values of Phomopsis species spores count obtained and used for inoculation was 4921875spores/ml. It was revealed that, there was no significant difference with respect to the methods of inoculation. Similarly, there was no significant effect on number of days after inoculation and the fungal pathogen disease symptom appearance (incidence) on the leaves of Jatropha seedlings. Though not significant, 17 Days after Inoculation (DAI) recorded the highest value of fungal incidence (0.73%) which was closely followed by 11 DAI (0.53%). The least symptom on the leaves of seedlings was recorded at 9 and 13 DAI with 0.20% each. However, at 11DAI control had a higher incidence of 54.36% and severity of 34.57% followed by imidacloprid + metalaxyl-m + tebuconazole at normal dose with an incidence of 5.20%. At 13DAI, result shows control treatment to have an incidence of 66.83% and a severity of 36.67% which statistically differ from imidacloprid + metalaxyl-m + tebuconazole at normal rate with 11.09% incidence and a severity of 20.00%. Mancozeb was found to be very effective in the management of Phomopsis leaf blight.

 

Keywords: Phomopsis, Leaf blight, Jatropha and Fungicides.

 

	Cite This Article As: Nasiru A. M., Salau I. A (2021). INORGANIC CONTROL OF PHOMOPSIS LEAF BLIGHT ON JATROPHA (Jatropha curcas L.). Acad. Res. J. Biotech. 9(1): 11-15