YMV infection is started in Urd crop in Tikamgarh district of Bundelkhand zone

Though the white fly population is low on the Urd crop, but YMV symptoms is appeared on the crop. The 2 to 3 % plants are expressed this symptom. There is possibility of moderate to heavy rainfall during next 48 hours and after that weather remains dry. If dry weather and maximum temperature after 17^th July is above 32°C for than a 5-6 days. The YMV symptoms on soybean crop will be expected to start at the ending week of July month in Tikamgarh district. Farmers are advised to keep watch the white fly population and keep field weed fry as much possible during July month. 

Low to moderate incidence of YMV in Soybean during kharif 2016 in Bundelkhand of M.P

Heavy rainfall and Low to moderate incidence of YMV in Soybean during kharif 2016 in Bundelkhand of M.P.

This year just after onset of monsoon white fly has migrated from other crops, weed, & habitats towards this region during last week of June (23-30). Their early arrival may be harmful and would be created an early infection on weeds and crops (Soybean). But thanks to very active monsoon period during the early July (1-8), which not only deeply recharge the soil, ponds, rivers and other and brings down the soil, water and air temperature. The heavy to very rainfall negatively impact the number of white fly population, and thus delay their activity and infections on plants.

The white fly infection may be delayed by two weeks. There is possibility in dry and sunny sky conditions during second and third week of July, which may has positive impact on white fly population but again there is possibility in wet and cloudy sky during last week of July and first week of August. These conditions may control not only white fly population but YMV on Soybean after 10^th August to 25^th August, which will coincide with the pod formation and pod development phase of Soybean.