Decision to apply one or more fungicide spray will depend on the risk of rust epidemic in a particular year. Rust epidemic is determined by interaction of three important factors namely, susceptible host, virulent pathogen and the most important i.e. favourable environment for a particular period of time. Therefore, it is necessary to study the correlation between different meteorological parameters and rust severity. Present study revealed that rust dis-ease generally appeared 60 days after sowing and was subsequently increased with a period of time till harvest (4.17 to 64.17 per cent). Disease was observed at a maximum temperature of 16.85 to 24.79áµ’C, 8.09 to 12.27áµ’C minimum temperature, 90.30 to 95.70 percent morning Relative Humidity (RH), 54.80 to 78.40 percent afternoons RH, 0.10 to 5.45mm rainfall and wind velocity of 3.93 to 4.23 km/hr. The correlation between different meteorological parameters and rust severity revealed that per cent disease severity showed highly positive correlation with maxi-mum temperature (r = 0.977), minimum temperature (r = 0.704), rainfall (r = 0.039) and wind velocity(r = 0.093) whereas disease severity show negative correlation with morning(r=-0.925) and afternoon RH (r = -0.926). It was observed that the rust severity is highly influenced by the different weather parameters such as temperature, relative humidity, rainfall and wind velocity. This information will help the researchers in formulating the forecasting model for the rust disease in pea and will also supports farmers in decision making regarding time of occurrence of rust epi-demic and thereby, allow timely scheduling and need based utilization of fungicides accordingly for the management of pea rust.
Rainfall, Relative humidity, Rust, Temperature
Chand, R., Srivastava, C.P., Kushwaha, C. (2004). Screening technique for pea (Pisum sativum L.) genotypes against rust disease (Uromyces fabae Pers. de Bary). Indian J. Agric. Sci., 74: 166â€“167.
Chand, R.; Srivastava, C.P.; Singh, R.M. and Singh R.B. (1997). Pea specific strains in Uromyces fabae. Indian J. Pul. Res., 10:127-128.
Chauhan, R.S. and Singh, B.M. (1994). Effect of different durations of leaf wetness on pea rust development. Pl. Dis. Res., 9(2): 200-201.
Chauhan, R.S., Sugha, S.K. and Singh, B.M. (1991). A note on the prevalence and distribution of pea rust in Himachal Pradesh. Him. J. Agric. Res., 17:105-107.
Gupta, R.P. (1990). Evaluation of pea germplasm for their reaction to powdery mildew and rust. Indian J. Pul. Res., 3:186-188.
Indian Institute of Pulses Research (IIPR), (2014). E- Pulses data book.
Joshi, A. and Tripathi, H.S. (2012). Studies on epidemiology of lentil rust (Uromyces viciae fabae).Indian Phytopath., 65 (1): 67-70.
Kumar, T.B.A., Rangaswamy, K.T. and Ravi, K. (1994). Assessment of tall field pea genotypes for slow rusting resistance. Legume Res., 17:79-82.
Kushwaha, C., Chand, R. and Srivastava, C.P. (2006). Role of aeciospores in outbreaks of pea (Pisum sativum) rust (Uromyces fabae). Europian J. Pl. Path. 115: 323-330.
Narsinghani, V.G., Singh, S.P. and Pal B.S. (1980). Note on rust resistance pea varieties. Indian J. Agric. Sci., 50:453.
National Council of Applied Economic Research (NCAER) (2014). Indiaâ€™s Pulses scenario.
Pearson, K. (1896). Mathematical Contributions to the Theory of Evolution. III. Regression, Heredity and Panmixia. Philosophical Transactions of the Royal Society of London, 187: 253-318.
Pearson, K. (1930). The Life, Letters and Labors of Francis Galton. Cambridge University Press.
Rana, K.S. and Sharma, S.K. (1993). Effect of rabi legumes on nitrogen economy and productivity of direct seeded upland rice. Crop Research, 6:165-167.
Sharma, A.K. (1998). Epidemiology and management of rust disease of French bean. Veg. Sci., 25:85-88.
Singh, D., Tripathi, H.S., Singh, A.K. and Gupta, A.K. (2012). Effects of sowing dates and weather parameters on severity of field pea. J. Pl. Dis. Sci., 7: 147-149.
Sokhi, H.S., Sokhi, S.S. and Rawal, R.D. (1974). Vertical reaction of pea to powdery mildew (Erysiphe polygoni) and rust (Uromyces vicia fabae). Mysore J. Agril. Sci., 8:529-532.
Stavely, J. R. (1991). Compendium of Bean Diseases. APS Press, St Paul, MN. pp 24-25.
This work is licensed under Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) © Author (s)