WEATHER BASED GRAPE ADVISORY
WEATHER DATA FOR THE PREVAILING WEEK
Date of Foundation Pruning: 16/04/2022
Thursday (23/06/22)–Wednesday (29/06/2022)
| Location | Temperature (°C) |
Possibility of Rain | Cloud Cover | Wind Speed (Km/hr) Min-Max | R H%
| ||
| Min | Max | Min | Max | ||||
| Nashik | 24-25 | 33-36 | Nashik, Dindori, Palkhed, Kalwan, Pimpalgaon Baswant, Ozar- Thu-Wed - Drizzling to Moderate Rain Loni,Vani - Thu-Wed - Drizzling to Light Rain. | Clear to cloudy | 09-19 | 47-58 | 83-90 |
| Pune | 22-23 | 27-30 | Pune, Phursungi, Loni Kalbhor, Uruli Kanchan, Patas, Yavat, Narayangaon, Indapur, Baramati - Thu-Wed- Drizzling to Light Rain. | Clear to cloudy | 09-20 | 45-64 | 79-83 |
| Solapur | 21-22 | 32-35 | Ausa, Latur -Thu, Fri, Sun, Mon - Drizzling Rain. Barshi- Thu, Fri, Sun, Mon, Wed - Drizzling Rain. Pandharpur, Solapur Vairag, Tuljapur, Nannaj - Thu-Wed - Drizzling to light Rain. | Clear to cloudy | 16-27 | 36-53 | 65-76 |
| Sangli | 22-23 | 26-30 | Sangli, Kagvad, Arag- Fri, Sat, Sun, Wed- Drizzling Rain Shirguppi, Palsi – Thu, Fri, Sat, Sun, Wed- Drizzling Rain Khanapur Vita- Thu, Sat, Mon- Drizzling to light Rain. Kawthe- Thu, Fri, Sat, Mon- Drizzling to light Rain. Walva, Shetfal, Miraj - Thu-Mon-Drizzling Rain. Tasgaon – Thu,Fri, Sat, Sun, Wed- Drizzling Rain Palus- Thu-Mon- Drizzling to light Rain. | Clear to cloudy | 17-31 | 50-67 | 78-85 |
| Vijayapura | 22-23 | 30-33 | Vijayapura- Thu, Fri, Mon- Drizzling Rain. Chadchan, Tikota & Telsang – Fri, Sat, Sun, Wed- Drizzling Rain. | Clear to cloudy | 23-37 | 46-58 | 73-78 |
| Hyderabad | 22-24 | 29-33 | Hyderabad, Medchal- Thu, Sat, Sun, Mon- Drizzling to light Rain. Zahirabad – Thu to Wed- Drizzling to light Rain. | Clear to cloudy | 14-25 | 43-60 | 63-74 |
| Satara | 21-22 | 24-29 | Satara, Phaltan– Thu-Wed- Drizzling to Light Rain, Khatav-Thu, Fri, Sat- Drizzling to Light Rain, | Clear to cloudy | 10-22 | 47-73 | 82-88 |
| Ahmednagar | 22-24 | 31-34 | Ahmednagar, Rahata, Shrigonda, Akole, Kopargaon, Sangamner, Karjat Jamkhed- Thu-Wed- Drizzling to Light Rain. | Clear to cloudy | 09-23 | 42-57 | 74-81 |
| Jalna | 22-24 | 32-35 | Jafrabad, Mantha,Gansawangi – Thu- Wed– Drizzling rain, Jalna, – Thu, Fri, Mon- Drizzling Rain. Ambad- Thu, Fri, Sat, Sun- Drizzling to Light Rain. | Clear to cloudy | 11-18 | 34-43 | 64-77 |
| Buldhana | 24-26 | 35-37 | Buldana, Chikhli, Sindkhedraja, D.raja– Thu, Fi, Sat, Mon– Drizzling rain. | Clear to cloudy | 07-17 | 39-43 | 69-73 |
| Kolhapur | 23-24 | 25-30 | Gagan-bavada, Kagal- Karveer- Thu- Mon– Drizzling to Light Rain. | Clear to cloudy | 10-17 | 60-87 | 91-96 |
| Bengaluru Rural | 19-20 | 26-30 | Bengaluru-east, Bengaluru-north, Bengaluru-south, Anekal, Doddaballapur - Thu- Mon – Drizzling Rain. | Clear to cloudy | 17-28 | 50-59 | 81-85 |
| Belagavi | 21-22 | 22-25 | Belagavi, Khanapur, Gokak - Thu- Wed– Drizzling to Light Rain. Chikodi, Athni - Thu, Fri, Sat, Sun, Wed- Drizzling to Light Rain. | Clear to cloudy | 17-25 | 79-89 | 90-94 |
| Bidar | 20-22 | 30-35 | Bidar, Basavakalyan, Humnabad – Thu- Wed- Drizzling to Light Rain. | Clear to cloudy | 13-25 | 43-61 | 73-81 |
| Bagalkot | 20-22 | 26-31 | Bagalkot, Mudhol - Thu, Sat, Sun, Mon – Drizzling Rain. Jamkhandi, Hungund - Thu- Mon– Drizzling rain. | Clear to cloudy | 25-35 | 47-66 | 70-78 |
Note: Above weather information is summary of weather forecasting given in following websites
https://www.wunderground.com/?cm_ven=cgi
https://imdagrimet.gov.in/weatherdata/BlockWindow.php
https://www.timeanddate.com/weather/india
ICAR-National Research Centre for Grapes does not claim accuracy of it.
II. Water management (Dr. A.K. Upadhyay & Yukti Verma)
A) Days after pruning : 69 days
B) Pan evaporation : 1 to 4mm
Amount of irrigation advised:
1. All the grape growing regions are forecasted to receive from drizzling to light 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. Fruit Bud Differentiation stage:
a. Apply irrigation through surface drip @ 1500 L/acre per day.
b. For fruit bud differentiation stage, stress needs to be given. In clayey soil as the water holding capacity is higher, please note that stress needs to be imposed early else fruitfulness will be affected.
3. Cane maturity stage:Apply irrigation through surface drip @ 1500 L/acre per day.
4. Flooding the vineyard is not advised as it leads to wastage of water. Concentrate irrigation water application in the root zone only.
5. In case of monsoon rains, 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.
Nutrient management
1. After current rains, give foliar spray of SOP @ 3-5 g/L depending upon canopy size.
2. 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.
3. 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.
4. 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.
Fruit bud differentiation stage
1. At 45 DAP, perform petiole test to know the nutrient content of the vines. The petioles should be collected from 5th leaf from the base of the shoot even counting the leaves that have been removed.
2. Apply Magnesium sulphate @ 15kg/ acre in atleast 2 splits from 45 to 55 DAP.
Cane maturity stage
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 soils, provide foliar application of Magnesium sulphate (@3g/L) in this growth stage.
III. Requirement of growth regulators (Dr. S.D. Ramteke)
- NIL
IV. Canopy Management (Dr. R.G.Somkuwar)
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.
IV. Disease management (Dr. Sujoy Saha)
| Days after fruit pruning | Risk of diseases | |||
| Downy mildew | Powdery mildew | Anthracnose | Others (specify) | |
| 69 | Low | Low | Low to moderate | Bacterial spot-low to moderate |
As cloudy conditions will prevail in most of the areas along with light drizzles, 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. Trichoderma application through drip should be continued. If in early sprouting stage one spray of copper oxychloride or copper hydroxide may be given @1.5-2g/l. 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. In areas where there is a slight drizzle, foliar application of Trichoderma formulations @ 3-4gm/ml per litre may be given. However, a gap of at least 48 hours may be kept between the application of bio control agents and chemicals. An application of Kasugamycin+Copper oxychloride may be given @ 0.75g/l for the management of both bacterial spot and anthracnose.
 |  |  |
| ‘Y’ junction symptoms of Anthracnose | Anthracnose | Bacterial spot |
V. Insect and Mite management. (Dr. D.S. Yadav)
1. Chafer beetles start emerging during the last week of May to first fortnight of June after first good rainfall and continue to feed on leaves at night for about a month. Installation of light traps outside the vineyard will be helpful in monitoring the initiation of emergence of the beetles and also to manage them. Run the light traps for 3 hours daily, during night between 7.00 pm – 10.00 pm and destroy the collected beetles in water mixed with insecticide. If chafer beetles are noticed, application of fipronil 80 WG @ 0.06 g/litre or lambda cyhalothrin 5 CS @ 0.5 ml/litre water may be given after 7:30 pm in night.
2. Due to reduction in temperature and cloudy conditions, mealybug infestation may be noticed. Use of broad spectrum insecticides should be avoided for mealybug control. Plant wash, on stem and cordons, of biocontrol agents such as Verticillium, Metarhizium, Beauveria may be given.
3. 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.
4. 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.