Weather Based Grape Advisory

Location	Temperature (°C)		Possibility of Rain	Cloud Cover	Wind Speed (Km/hr) Min-Max	R H%
Location	Min	Max	Possibility of Rain	Cloud Cover	Wind Speed (Km/hr) Min-Max	Min	Max
Nashik	22-23	25-30	Nashik, Dindori, Ozar, Vani Palkhed, Kalwan, Pimpalgaon Baswant, Loni – Thu-Wed- Moderate to Heavy rain.	Clear to cloudy	22-27	73-92	91-95
Pune	20-21	24-27	Pune, Phursungi, Loni Kalbhor, Uruli Kanchan, Patas, Yavat, Narayangaon Indapur, Baramati –Thu-Wed –Moderate to Heavy Rain.	Clear to cloudy	20-25	67-84	85-89
Solapur	20-21	21-31	Solapur, Pandharpur, Latur, Vairag, Barshi, Tuljapur, Nannaj, Ausa, - Thu-Wed – Light to Heavy Rain.	Clear to cloudy	19-30	55-73	76-81
Sangli	21-22	26-28	Sangli, Shetfal, Arag, Tasgaon, Kagvad Palus, Miraj, Kawthe Palsi, Khanapur Vita Shirguppi, Walva- Thu, Fri, Sat, Sun, Mon, Wed- Thu-Wed –Drizzling to Moderate Rain.	Clear to cloudy	27-31	61-74	82-86
Vijayapura	21-22	27-30	Vijayapura, Chadchan, Tikota & Telsang –Thu, Fri, sat, Sun, Tue, Wed – Drizzling to light Rain.	Clear to cloudy	26-37	58-71	80-83
Hyderabad	21-22	27-29	Hyderabad, Medchal, Zahirabad–Thu-Wed –Drizzling to Moderate Rain.	Clear to cloudy	24-28	51-67	76-82
Satara	21-22	23-25	Satara, Khatav, Phaltan- Thu- Wed- Light to Moderate Rain.	Clear to cloudy	16-23	77-89	88-93
Ahmednagar	21-22	26-30	Ahmednagar, Rahata, Kopargaon, Shrigonda, Sangamner, Jamkhed, Akole, Karjat- Thu- Wed- Drizzling to Moderate Rain.	Clear to cloudy	24-32	69-83	85-89
Jalna	20-22	25-30	Ambad, Jalna, Gansawangi, Mantha, Jafrabad - Thu- Wed- Light to Moderate Rain.	Clear to cloudy	18-23	65-83	86-90
Buldhana	22-23	26-32	Buldana, Chikhli, Sindkhedraja, D.raja- Thu- Wed- Drizzling to Light Rain.	Clear to cloudy	17-25	61-76	85-88
Kolhapur	22-23	27-28	Gagan-bavada- Thu- Wed- Moderate to Heavy Rain. Kagal, Karveer- Thu- Wed- Drizzling to Light Rain.	Clear to cloudy	11-14	86-92	94-96
Bengaluru Rural	20-21	25-30	Anekal, Doddaballapur, Bengaluru-east, Bengaluru-north, Bengaluru-south- Thu-Wed- Drizzling- Light rain.	Clear to cloudy	20-25	55-73	83-88
Belagavi	23-24	26-28	Gokak, Athni, Chikodi- Thu – Wed- Drizzling to Light Rain. Khanapur, Belagavi- Thu- Wed- Light to Moderate Rain.	Clear to cloudy	19-25	67-81	85-88
Bidar	21-22	27-29	Bidar, Basavakalyan, Humnabad – Thu –Wed- Light to Moderate Rain.	Clear to cloudy	18-22	60-73	82-88
Bagalkot	21-22	27-29	Bagalkot, Hungund, Jamkhandi, Mudhol –Thu- Wed - Drizzling- Light rain.	Clear to cloudy	24-28	57-72	78-84

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

1. All the grape growing regions are forecasted to receive from drizzling to heavy rains. The irrigation water application should be based upon the growth of the vines. In case rain exceeds 5 mm on a given day, irrigation water application can be skipped for that day. Generally, under wapsa (field capacity) condition of the soil, donot give irrigation.

2. If the soils especillay medium and heavy, are saturated with water, then, do not irrigate for atleast 5-7 days till the soil comes to wapsa condition.

3. Cane maturity stage: Apply irrigation through surface drip @ 1500 L/acre per day, if required only.

4. In rainy conditions, remove mulch cover on the bund and allow the rain water to seep into the soil. This will leach the accumulated salts in the rootzone. The mulch so removed can be mixed with the soil to improve the soil porosity.

1. If the rootzone is saturated then donot apply any fertilizer. Growth will be slow, donot worry. As and when the soil comes into field capacity (wapsa), root activity will increase and the growth will progress. After that only fertilizer should be applied.

2. Due to continuous sprays the leaf will not look healthy, need based sprays should be followed as the leaf health is bound to affect the photosynthate formation. This will impact bunch development.

3. After current rains, give foliar spray of SOP @ 3-5 g/L depending upon canopy size.

4. In case of calcareous soils where acute iron deficiency is observed, repeatedly spray 2-3g/L Ferrous sulphate two to three times at 3 days interval followed by 15-20 kg/ acre Ferrous sulphate application through drip. The fertigation dose should be split into atleast 3 doses of 5kg each. Apply 5kg/ acre soluble sulphur through drip every week. Also spray magnesium sulphate and potassium sulphate @ 3 gm each/ L once only.Keep a close watch on the development of leaf blackening symptoms if irrigation water contains sodium more than 100ppm.

5. Possibility of leaf curling, check the leaf margins, if slight to more yellow, possibility of potassium deficiency. Foliar spray of SOP @ 3-4g/L followed by fertigation of 20-25 kg SOP/acre in 2 to 3 splits.

6. In coloured varieties like Jumbo, Nanasaheb Purple etc., leaf curling along with reddening/ bronzing of the leaf margin can be observed if potassium deficiency is there. Foliar spray of SOP @ 3g/L followed by fertigation of 20-25 kg SOP/acre in 2 to 3 splits.

1. Potassium application is required from Cane maturity stage onwards. Approx. 64 kg of sulphate of potash (soluble grade) should be applied in this stage. Split the application into atleast five doses to reduce the leaching losses of the potassium. Apply 15 kg SOP in two – three splits during this week. In calcareous soils, provide foliar application of Sulphate of Potash (@ 4g/L) once in this growth stage.

2. Apply magnesium sulphate @ 15 kg/acre in two splits. The application should be done during 60-75 days after pruning. In calcareous so

1. In case pruning is planned during August - September, raise Sunnhemp or Dhaincha for green manuring purpose.

2. The vineyards where sodicity problems are there, apply gypsum to the soil for removal of sodium from the soil exchange complex. In case of calcareous soils, use sulphur for similar purpose. The application should be alongwith FYM/compost etc. They should be mixed in the soil and not left on the top.

3. In case of calcareous soils, if SSP is applied as basal dose, mix with FYM/compost etc. to avoid phosphorus fixation.

4. Test the soil and irrigation water, to plan for nutrient and water management during fruit pruning season.

The weather condition in major grape growing areas is changed with reduction in temperature and increase in relative humidity. Based on the prediction of rainfall in the coming week, following suggestions are offered.

1) The shoot vigor will increase at faster rate. This will result into increase in leaf above the requirement. Hence, the leaf above the requirement are to be removed by pinching.

2) Pinching of shoots to be done immediately. Delay in pinching of extra growth results into loss of nutrients. The hard pinching also results into emergence of bunches on the emerged shoots.

3) Delay in shoot pinching will further delay the cane maturity. This condition may lead to either fillage or small bunch or even in some cases, failure of crop. To avoid, shoot pinching followed by application of potsassic fertilizer may help to advance the cane maturity.

4) Under the condition of milky white color of 2-3 internodes from the base of a shoot, spray of Boudreaux mixture @ 0.5% ca be started. This will help to control the diseases during the period of high humidity and rainfall condition.

5) Control of irrigation water will help to keep the vegetative growth under check.

6) During this period, development of second instalment of cordon can be initiated.

7) In majority of the grape vineyard, swelling of nodes, bulging of shoot, cordon, etc is observed. Application of excess cytokinin based plant growth regulators, growth retardants, shortage of irrigation water, excess use of potash and sometimes use of weedicide in the vineyard to control the weed may lead to this problem. To control, application of nitrogenous fertilizers, increase in irrigation to encourage the vegetative growth for about 4-5 leaf may be followed.

8) Use of biologicals in the form of spray and drenching may be followed during this stage.

Rains will prevail in most of the areas and anthracnose, powdery and downy mildew may be incident in a low to moderate scale. One preventive spray of Thiophenate methyl/carbendazim@1g/L should be given for anthracnose control. Anthracnose or bacterial spot attack may occur immediately after rains. Removal of old infected material especially of anthracnose is a must to prevent fresh infection. The ‘Y’ junctions on the canes should be checked for blackish discolouration as it is an indication of anthracnose disease. Mancozeb/Metiram/Ziram @ 2-2.5g/l may be given as a preventive for downy mildew control and it will control bacterial spot as well. An application of Kasugamycin+Copper oxychloride may be given @ 0.75g/l for the management of both bacterial spot and anthracnose.

1. Due to reduction in temperature and cloudy conditions, mealybug infestation may be noticed. Use of broad spectrum insecticides should be avoided for mealybug control. Buprofezin 25 SC @ 1.25 ml/l water may be given to manage mealybugs. Preventive plant wash, on stem and cordons, of biocontrol agents such as Verticillium, Metarhizium, Beauveria may be given.

2. In case of thrips or caterpillar infestation, application of fipronil 80 WG @ 0.0625 g per litre or emamectin benzoate 5 SG @ 0.22 g per litre water is effective.

3. Mite infestation may start appearing, therefore, monitor the vineyards carefully. If mite infestation is observed, sulphur 80 WDG @ 1.5-2.0 gram per litre or abamectin 1.9 EC @ 0.75 ml/l water is effective.

4. Red colour stem borer (Dervishiya cadambae) has started egg laying and infestation under bark in grape areas. Install light traps near the vineyards to manage moths of this stem borer. Remove loose bark from stem and cordons and give preventive wash on stem and cordons with biocontrol agent Metarhizium @ 3-5 ml per litre water minimum once in the month during July to September months.

Days after fruit pruning	Risk of diseases
Days after fruit pruning	Downy mildew	Powdery mildew	Anthracnose	Others (specify)
83	Low	Low	Low to moderate	Bacterial spot-low to moderate

WEATHER BASED GRAPE ADVISORY