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Effect of Environmental Factors on Potato Leaf Roll Virus (PLRV) Infecting Potato Varieties and Myzus persicae (Sulzer)

Effect of Environmental Factors on Potato Leaf Roll Virus (PLRV) Infecting Potato Varieties and Myzus persicae (Sulzer)

Yasir Iftikhar1, Mustansar Mubeen1,2*, Waqas Raza1, Qaiser Shakeel3, Waseem Abbas1, Shehzad Iqbal1 and Ashara Sajid

1Department of Plant Pathology, College of Agriculture, University of Sargodha, Sargodha-40100, Pakistan; 2State Key Laboratory of Agricultural Microbiology and Provincial Key Laboratory of Plant Pathology of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, P.R. China; 3Discipline of Plant Pathology, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Bahawalpur, Pakistan.

mustansar01@yahoo.com  

ABSTRACT

The Potato leaf roll virus (PLRV), aphid population, and environmental factors are normally used to monitor the disease severity as these factors are interconnected. In the present study, ten potato varieties viz., FSD white, FD 8-1, FD 71-1, Tota 704, Kuruda, FD 74-41, FD 76-24, SH 216-A, N 96-25 and FD 74-50 were evaluated against PLRV. The range of disease incidence was from 15.93% to 64.58%. Moreover, susceptible reaction was observed in five varieties (FD 71-1, Tota-704, FSD white, FD 76-24 and FD 8-1). Two varieties (Kuruda and SH 216 A) were moderately resistant, while three varieties, FD 74-41, FD 74-50 and N 96-25 were found to be moderately susceptible. In susceptible varieties, disease severity was significantly correlated with temperature (max and min), and relative humidity (RH). Whereas, disease severity in moderate resistant varieties also showed a significant correlation with temperature. However, disease severity in the moderate resistant varieties were significantly correlated with the temperature and relative humidity. Highest disease incidence (39.33 %) was recorded at maximum temperature 19ºC. However, the disease severity was found to be highest (21.33%) in minimum temperature at 5ºC. The disease severity was highest at the highest aphid population. Highest population of aphids 33 was recorded at the 27ºC and lowest of 6 at 5ºC. Hence, it is concluded that PLRV incidence generally influenced by environmental factors and aphid population. It is proposed that PLRV can be managed through resistant varieties and monitoring of aphid population. 

 

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Pakistan Journal of Zoology

August

Vol. 52, Iss. 4, Pages 1225-1630

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