Mid-season drought in Bhundelkhand Agroclimatic zone of MP

As per IMD published weekly rainfall update, the rainfall (from 1-June to 22-August,2017)in districts of Chattarpur , Datia and Tikamgarh of MP is 27,29 and 33 percent below the normal rainfall of that period. The rainfall during 1-22 August is very low,hence these area are facing mid-season drought.
The total rainfall from 1- June 2017 to 18 August 2017 is around 500mm in Tikamgarh.

The YMV infections in soybean is observed in many farmers fields and may be  spread to other healthy plant in next few weeks.

If the rainfall during 23 August to 30 Sept,2017 is below 300mm crop yield may be below average. The possibility that log duration variety of the crop will have moderately affected than the medium varieties.

Monitoring of rainfall is to be made to assess the drought situation in these districts. We have to see the ISRO and IMD  F2 forecast for crop yield.

Number of dry days will be more during September put a adverse effect on soybean yield

Passive phase of monsoon will be started in Bundelkhand due to which possibility of scattered rainfall  in this zone. Maximum temperature will be increased and minimum will be decreased. This type of situation put little be stress on translocation of biomass from sink to source if maximum temperature  is above 33-34°C for more than 6-7 days. YMV infection has been observed in local and old cultivars of soybean, which might be increased.

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.  

YMV infection in Soybean started in Bundelkhand

The disease YMV infected Soybean in Tikamgarh during last week of July,2015. The YMV first infected a weed and than the soybean crop. The cultivar JS 335 is infected first, though the infection is very low, but due to high night temperature (above normal) and dry period is suitable for its further growth on other healthy plants.

The rainfall activity during last week of July was almost very low ,only scatter rainfall at few place, this may be the reason for its growth.

May be some rain in next two-three days which will checked its growth.

Moreover, farmers have to only keep watch on the disease growth.  

Heavy rainfall may be control the spreading of MYMV in Bundelkhand region

There are incidence of Yellow Mosaic Virus in Black gram in many parts of the region. The high temperature (above normal) and humidity will helpful for its spreading/multiplication on new plant leaf/area/plant.

But there is possibility of heavy rain during first week of August in Bundelkahnd ,which will check its  spreading/multiplication on new plant leaf/area/plant.

Weather based MYMV forewarning model
When minimum temperature  is above normal and white fly population is around 15 or more/plant and weekly rainfall is 50mm/week or below during 34-37th SMW  , than YMV outbreak is possible.
Henace, control white fly and its multiplication.