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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 (01/12/2016)--Thursday (08/12/2016) 

 

 

Location

 

    Temperature

 

    Possibility of Rain

 

Cloud Cover

Wind Speed

(Km/hr)

         R H%

           

Min

Max

Min

Max

Nasik

   16-18

31-32

No Rain

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

Clear- Partly cloudy  

05-11

20-39        

52-72

Pune

  17-21

  31-32

No Rain

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

Clear- Partly cloudy  

02-24

21-46         

53-76

Solapur

     18-23

 33-34

No Rain

Solapur, Nanaj, Kati, Atpadi, Vairag,

Pandharpur, Kasegaon,  Barshi, Pangri, Kari, Latur, Ausa, Osmanabad, Tuljapur.

Clear- Partly cloudy  

10-23

15-41

46-75

Sangli

   18-23

 32-34

Drizzling  Sat

Sangli, Miraj, Shirol, Arag, Shirguppi, Kagvad.

No Rain

 Kavate Mahankal, Palus, Valva,   Palsi, Shetfal, Vite, Khanapur

Clear- Partly cloudy  

06-26

18-45

48-86

Bijapur

   17-21

  31-32

No Rain

Bijapur, Tikota, Telsang, Chadchan

Clear- Partly cloudy  

08-26

17-25       

36-57

Hyderabad

   16-21

  29-31

Drizzling Fri

Hyderabad, Medchal, Rainlaguda.

No Rain

Zahirabad

Clear- Mostly cloudy  

02-11

25-36       

54-76

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:  25 to 50 days

b) Expected growth stage of the crop: Bunch elongation to berry set

     

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

Expected pan evaporation:  4 to 6 mm

 

Amount of irrigation advised

 

For October pruned vineyards, during Flowering to setting stage, apply irrigation through drip @ 2800 L/ acre/ day for Nasik, Pune, Bijapur and Hyderabad regions and from 3360 L/ acre/ day for other regions.  Further, in case vigour is more than desired, then reduce irrigation water application by half to 1250 L/ acre for Nasik, Pune, Bijapur and Hyderabad regions and 1680 L/acre for other regions. 

During Berry growth stage, apply irrigation through drip @ 6,800 to 8,500 L/ acre/ day for Nasik, Pune, Bijapur and Hyderabad regions and from 8,500 to 10,200 L/ acre/ day for other regions. 

In late pruned vineyards (Nov., 2016), during shoot growth stage, apply irrigation through drip @ 6800 to 8500 L/ acre/ day for Nasik, Pune, Bijapur and Hyderabad regions and from 8500 to 10,200 L/ acre/ day for other regions.  Further, in case vigour is more than desired, then reduce irrigation water application to 3400 L/ acre/ day for Nasik, Pune, Bijapur and Hyderabad regions and 5000 L/acre/ day for other regions.  Still if you are not able to control the vigour, stop irrigation till such time vigour is controlled.

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

October pruned vineyard

  1. After Berry setting, continue initially with Phosphoric acid application @ 7.5 kg in two splits this week. 

  2.  Spray Calcium @ 2g Calcium Chloride or 0.5 g Ca chelate per litre at berry size of 2-4 mm and 6-8 mm.

  3. After 15 days after setting (around 60-65 days), start application of ammonium sulphate @ 20 kg/acre in 3splits followed by application of 0-0-50 through drip @ 20 kg in 3 splits

  4. If the soil has high calcium carbonate content, apply 5 kg Zinc sulphate along with 5 kg Ferrous sulphate in two splits.

  5. In the calcareous soil, spray magnesium sulphate @ 3g/L on the vines followed by fertigation of magnesium sulphate @ 10kg/acre.

November pruned vineyard

  1. If the crop is between 5 leaf to prebloom stage, apply Zinc sulphate and Ferrous sulphate @ 15 kg/ acre based upon soil test value.  Boron application should be carried out only if soil test value indicates low levels and the irrigation water does not contain boron.  If during foundation pruning, the petiole test stated that boron was deficient then apply boric acid @ 1.5 kg to 5 kg depending upon the soil test value.  Apply one kg boric acid at a time.

  2. Apply 10 kg Magnesium sulphate per acre if the crop is between 5 leaf to prebloom stage.

  3. If sodicity problem is there, apply 10 kg Sulphate of potash per acre in 2 splits this week.

  4. Donot apply any nitrogen based fertilizer from 4-5 days before Flowering to Setting stage to avoid problems of kooj (inflorescence necrosis).  Apply 5 kg Phosphoric acid in two splits this week.

  5. During flowering petiole testing should be carried out.

 

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

As the crop is around 45-50 days old, and most of the vines are in flowering stage, it is advised not to use any phyto-hormones as it might lead to flower drop.

 

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

 

Under the condition of clear weather, powdery mildew incidence may spread at higher intensity under dense canopy. Hence, training of shoots on wire will help to make open canopy and ease in spray coverage.

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

Days after pruning

Risk of diseases

Downy mildew

Powdery mildew

Anthracnose

Others (specify)

45-52

Nil

Low medium

Nil

Nil

 

Both Pune and Solapur will experience cloudy conditions while Sangli will have low temperature (around 9-10oC) with early morning dew/fog. Monitoring for downy mildew infection is necessary although spraying may not be taken at this stage. If there is an existence of thick canopy, it should be thinned out for air passages so that there is no buildup of humidity. High humidity will aggravate powdery mildew infection. In vines at pre-flowering stage, application of triazoles like Difenoconazole @0.5ml/L or hexaconazole @ 1ml/L or flusilazole @ 12.5ml/100L or Fluopyram + tebuconazole @0.5ml/l should be done while at post flowering stage, dinocap@0.35mml/L should be sprayed. If the infection of powdery mildew is already existent in the vines application of myclobutanil@ 0.4g/L or tetraconazole @ 0.75 ml /L will provide good control of the disease. Application of Trichoderma formulations @4-5g/L, at this stage will also be beneficial. As observed in many vines, inward curling/rolling of leaves are predominant (A) which may be due to potassium deficiency and this might be detrimental as powdery mildew infection might increase (B). Hence, it is advised to mix potassium hydrogen carbonate@3-5g/L along with the triazoles during application. After berry set it is advised to restrict the spray of triazoles and use sulphur@2g/L.

(A) (B)

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

 

 

A.  Pest risks:

B.  Integrated options for management:

 

*Avoid use of imidacloprid at flowering period and after 50 days of fruit pruning.

**Fipronil should be used only once in a fruiting season and should be avoided after flowering period

 

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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