Impact of western disturbances on stone fruits in mid hill zone of Himachal Pradesh

The study on impact of western disturbances on stone fruits grown in mid hill zone of Himachal Pradesh” was done at Dr. YS Parmar University of Horticulture and Forestry, Nauni.The western disturbances (WD) data was collected for the period 1984-2022. The arrival and withdrawal of WD indicated that during the period of 38 years the WD arrived during October and withdrawal during May in Solan district of Himachal Pradesh. The WD duration and amount of rainfall received was decreasing at 0.29 Julian days/year and 1.65 mm/year but, the number of WD was increasing at a rate of 0.12 JD/year which indicated that the frequency, distribution and intensity of WD was increasing over time in mid hills of Himachal Pradesh. The regression relationship was developed between the number of WD and productivity at development and maturity stages of plum and apricot crops. The results depicted positive relationship between number of western disturbance and productivity at developmental stages with coefficient of determination (R²: 0.58 and R²: 0.51) whereas showed negative relationship at maturitystage of selected crop.