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The article discusses the influence of different weather conditions on the severity of white rust disease in Indian mustard (Brassicajuncea (L.) Czern & Coss) in India. Topics include the benefits of cool and moist climate on the growth and productivity of the crop, the biotrophic oomycete pathogen Albugo candida as the cause of white rust, and a study which examined the progression of white rust due to variable weather in the country.

Field experiments were conducted at CCS Haryana Agricultural University, Hisar during kharif season of 2013 and 2014 to determine the effect of weather parameters on the incidence of pod borer complex on early maturing pigeonpea varieties. The study revealed that the infestation of Helicoverpa armigera and Maruca vitrata started with the onset of bud initiation and reached its peak at flowering stage. The maximum H. armigera larval population (1.83 larvae plant-1) was recorded in 1st week of July sown crop, whereas, the maximum incidence of M. vitrata (21.17 webs plant-1) was recorded in 2nd week of July sown crop. The larval population of H. armigera was significantly and positively correlated with the maximum temperature, followed by minimum temperature.Incidence of M. vitrata was negatively correlated with evening relative humidity and wind speed which was significant at p ≤ 0.05 level of significance. [ABSTRACT FROM AUTHOR]

Six varieties of wheat and triticale (DDK1029, TL2934, PBW174, DPW 621-50, PBW343 and PBW590) were sown in the field of Indian Institute of Wheat and Barley Research, Karnal, Haryana (IIWBR) and Regional Research Station, Dhaulakuan under Himachal Pradesh Krishi Vishvavidyalaya, H.P during seasons 2012-13 and 2013-14 to study the role of environmental factors on the development of powdery mildew of wheat (Erysiphe graminis f.sp. tritici). The disease development was positively correlated with temperatures and negatively correlated with evening relative humidity and rainfall under field conditions. Best fit regression model was developed with maximum temperature, evening relative humidity and rainfall across the varieties and locations which explains 64% variation in powdery mildew disease. [ABSTRACT FROM AUTHOR]

The article presents a study aimed to estimate the potential evapotransportation in north-west India. The study was undertaken through giving consideration to the daily maximum and minimum temperature data recorded by the twenty two meteorological stations located in the region. Statistical measures were computed through the use of 'OP Stat' software.

Weather disease interaction study was carried out at Hisar (75°46'E 29°10'N and 215.2a.m.s.l). Nineteen years (1996-2014) yellow rust data was recorded during the peak period of yellow rust incidence (20thDecember to 20th February) on six varieties of wheat (WH 147,PBW 343,WH 711,PBW 175, KH 65 and C 306). Weather data of corresponding period (1996 to 2014) was taken from Agrometeorological observatory located at Research farm.Yellow rust incidence values were transformed using Logistic and Gompertz models for development of weather based prediction models.Transformed values of disease incidence were correlated with weather parameters and correlation coefficient indicates that rainy day was the most important/significant weather parameters in disease progression. Rainy day, minimum temperature and morning relative humidity collectively explained maximum variability in disease progression. The Gompertz model was found to be the best fit over the years for describing zonate leaf spot disease incidence in a natural inoculum population of Pucinia striiformis on wheat [ABSTRACT FROM AUTHOR]

The article presents a research study for analyzing the impact of conditions like soil temperature, moisture and crop planting depth on the development of the black scurf disease in potato crop at the Chaudhary Charan Singh (CCS) Haryana Agricultural University's Research farm of Vegetable Science located in Hisar in Haryana, India. Topics discussed include calculation of percent disease incidence (PDI), correlation coefficient between soil and disease incidence and results of the study.

The article talks about a research which analyzes rainfall trend in north-west India. Topics discussed include the diverse soil and climate found in the north-western part of India; the horticultural crops produced in this part of the country; and the importance of rainfall for agriculture in the region.

The article talks about a research focusing on the chilling hours of temperate fruit crops in north-west India. Topics discussed include the potential impact of climate change on the chilling requirements of the plants; the temperature data obtained for the research; and the role of the availability of chilling hours in determining crop and varieties.

The article focuses on a study related to the thermal time requirements of genotypes of Brassica plant species at Hisar, India. It mentions that a quick rise in the air temperatures during reproductive stage shortenes seed filling period. It also mentions that fertilization, irrigation and management practices are recommended in the packages of practices for mustard crop in Hisar, India. It also mentions importance of optimum sowing time in achieving potential yield of any crop.