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मौसम पूर्वानुमान आधारित साप्ताहिक सलाह

Weather Forecast Based Weekly Advisory

 

 (Assumption: Fruit Pruning date - 15/10/2016)

 

I.        Weather Data for the Prevailing Week

 Thursday (19/01/2017) -- Thursday (26/01/2017)

 

Location

 

    Temperature

 

    Possibility of Rain

 

Cloud Cover

Wind Speed

(Km/hr)

         R H%

           

Min

Max

Min

Max

Nasik

   17-19

29-32

No Rain

Nasik, Ojhar, Pimpalgaon Baswant, Vani, Palkhed, Dindori, Shirdi, Loni, Rahata, Niphad, Kalwan, Devla, Lasalgaon, Satana.

Clear

03-18

24-33        

50-66

Pune

  18-21

  31-33

No Rain

Pune, Phursungi, Loni Kalbhor, Uruli Kanchan, Yavat, Rahu, Patas, Pargaon, Supa, Baramati, Narayangaon, Junnar.

Partly cloudy -Clear

02-23

24-33

44-57

Solapur *

19-22

32-34

No Rain

Solapur, Nanaj, Kati, Atpadi, Vairag, Pandharpur, Kasegaon,  Barshi, Pangri, Kari, Latur, Ausa, Osmanabad, Tuljapur.

Partly cloudy -Clear

08-23

18-28

39-56

Sangli *

   18-22

 31-33

No Rain

Sangli, Miraj, Shirol, Arag, Shirguppi, Kagvad, Kavate Mahankal, Palus, Valva,   Palsi, Shetfal, Vite, Khanapur

Partly cloudy -Clear

08-24

20-32

48-66

Bijapur *

   18-22

  30-32

No Rain

Bijapur, Tikota, Telsang, Chadchan

Partly cloudy -Clear

07-25

20-32      

47-69

Hyderabad *

16-19

29-31

No Rain

Hyderabad, Medchal, Rainlaguda.

Zahirabad

Mostly cloudy -Clear

03-18

26-35

65-93

 * Tropical storm conditions possible

 

Note: Above weather information is summary of weather forecasting given in following websites

http://www.imd.gov.in/, http://wxmaps.org/pix/prec6.html, http://www.fallingrain.com/world/IN/, http://www.wunderground.com/, http://www.bbcweather.com-weather/1269750, etc.

II.      a) Days after pruning:  60 to 90 days

b) Expected growth stage of the crop: Berry growth to veraison

     

III.     Water management (Dr. A.K. Upadhyay)

Expected pan evaporation:  3.5 to 6 mm

 

Amount of irrigation advised

For October pruned vineyards, during Berry growth stage, apply irrigation through drip @ 5950 to 8500 L/ acre/ day. 

In late pruned vineyards (Nov., 2016), during Flowering to setting stage, apply irrigation through drip @ 1960 to 3360 L/ acre/ day.  After berry setting, apply irrigation through drip @ 5,950 to 10,200 L/ acre/ day.

 

 

IV.     Soil and Nutrient requirement (Dr. A.K. Upadhyay)

October pruned vineyard

  1. Berry development stage: Apply Sulphate of potash or 0-0-50 @ 25 kg/ acre in 3-4 splits for next two weeks.  If the soil has high calcium carbonate content, apply 5 kg Zinc sulphate along with 5 kg Ferrous sulphate in two splits.

  2. Ripening to Harvest stage: Apply Sulphate of potash or 0-0-50 @ 25 kg/ acre in 3-4 splits for next two weeks.  Follow this up with Magnesium sulphate @ 10 kg/acre in two splits.  Spray Magnesium sulphate in calcareous soil.

November pruned vineyard

  1. Flowering to setting stage: Apply 5 kg Phosphoric acid in two splits this week.  During flowering stage, petiole testing should be carried out.

  2. After Berry setting, continue initially with Phosphoric acid application @ 7.5 kg in 2-3 splits this week.  Apply Magnesium sulphate @ 10 kg/acre in two splits.  Spray Calcium @ 2g Calcium Chloride or 0.5 g Ca chelate per litre at berry size of 2-4 mm and 6-8 mm.

V. Requirement of growth regulators (Dr. S.D. Ramteke)

During this time there is a probability of  Ukadya which is a physiological disorder. The symptoms  appears on the berries approximately during 70 to 90 days after fruit pruning and it may continue upto veraison stage. Low temperature during night, high humidity during morning hours which prolong upto afternoon, and high temperature during day are the factors which are responsible for this disorder.Following measures can be used to avoid this disorder

1)     Donít apply flood irrigation in vineyards during 70-80 days after pruning

2)     Avoid dense canopy so that a proper aeration and ventilation will be inside the grape garden

3)     Donít apply continues  irrigation for 3-4 hours instead  give the irrigation on daily basis and it may be given more frequently for less time (may be for 20 minutes)

4)     Fix the drippers at 1 feet height

5)     Donít apply huge mulching and keep it open

6)     Donít give stress of any kind during berry development stage

7)     Apply balanced nutrition

8)     Donít apply higher concentration of bio regulators (phyto-hormones)

9)     Do not spray the pesticides frequently instead use effective chemicals at less frequently.

 

VI. Canopy management (Dr. R.G. Somkuwar)

    1.     Recut of grafted vines:

    During this week, the minimum temperature is expected to be in the range of 17 to 22įC and maximum temperature between 29 to 34įC. This condition is an ideal condition for taking re-cut to the grafted vines since the vine will be in active physiological state. Hence, the re-cut to the grafted vines can be started in this week.

    2.     Establishment of new vineyard: The planting of grape rootstock can also be taken up during this week since the temperature available is favourable for root growth. After planting the rootstock, under the condition of light soil, everyday irrigation is recommended while in the black cotton or heavy soil alternate day irrigation will be sufficient.

    3.   Old vineyard: Since the temperature is increasing, the color development in color varieties will be faster. Hence it is advised not to use ethephon for faster color development. The use of ethephon may reduce the shelf life. Instead, harvesting of few bunches from each vine will help for faster color development

 

VI.   Disease management (Dr. S.D. Sawant and Dr. Sujoy Saha)

Days after pruning

Risk of diseases

Downy mildew

Powdery mildew

Anthracnose

Others (specify)

88 - 94 Nil Low-medium Nil Nil

Rains are expected in Sangli, Tasgaon and Mirage region next week although this week the weather is relatively clear. Powdery mildew incidence is the only matter of concern in the prevailing condition. For powdery mildew management, myclobutanil@ 0.4g/L or tetraconazole @ 0.75 ml /L should be applied(if at least 45 days are remaining for harvest; apply any one and NOT both) Application of  sulphur 80WP@2g/L is advised to avoid residue detections. Use of biocontrol agents like Bacillus sp/Trichoderma sp/Ampelomyces sp may be continued. If the diurnal variation of temperature is around 200C and berries are in the veraison stage, prior to their covering, they should be sprayed with Bacillus subtilis@ 3-4g/L which will not only control powdery mildew but will also aid in bioremediation.

 

VII.    Insect and Mite management. (Dr. D.S. Yadav and Dr. B. B. Fand)

 

123 

A. Pest risks:

       Very high risks of infestation of  mealybugs and mites

 

B. Management measures

       Use of insecticides with low PHI should be preferred to avoid residue problems

       Close monitoring is required for the presence of mealybug egg masses, appearance of honeydew on bunches, movement of crawlers and ants on stems and cordons, especially below the loose bark.

       Loose bark on stems and cordons should necessarily be removed for making the effective contact of insecticide with the insects  

       Spray application of neem based products (Azadirachtin) will be helpful for controlling both mealybugs and mites

       Plant wash with buprofezin @ 1.25 ml/lit (water volume 1.5 lit/vine) will help to control mealybugs. Please consider the PHI of insecticide before use.  

       The spot treatment may be effective to control localised infestations of mealybugs instead of blanket spraying over entire area. This will also reduce the labor and insecticide cost besides minimization of the risk for residue

       Sulphur 80 WDG @ 2 g/lit for controlling mites. If heavy infestation of mites is seen, give jet spray of water @ 2500 litres/ha before spraying of miticides, which will help to remove the mite webbings and improve the efficacy of miticide sprayed

 

Recommended insecticides with their MRLs and PHIs

(Source: Annexure 5, NRL, ICAR-NRCG, Pune)

S. No.

Insecticide

EU MRL(mg/kg)

PHI (days)

1.      

Buprofezin 25 SC

1

40

 

 

Crop advisory relevant to different places is prepared by experts, considering forecasted weather, crop growth stages in majority of vineyards and ground information on incidence of different conditions in different grape growing areas received from regular interaction with progressive grape growers. No claims are made on its correctness.

Usefulness of this information may be communicated to us at director.nrcg@icar.gov.in.

 

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