Parameter

Nasik area

Sangli

Solapur area

Pune  area

Bijapur

Rangareddy

(Hyderabad)

Cloud cover

Clear or partly cloudy

Partly

Cloudy to overcast

Partly

Cloudy to occasionally overcast

Partly

Cloudy

Thurs- Fri overcast  

Partly

Cloudy to overcast

Cloudy to overcast

Rainfall

No rains 

Rain on Wed, Fri -Sat

No rains

No Rains. But may Fri light rain possible

No Rains, Sunday Thunderstorm

No Rains, Sun – Mon chances of Thunderstorm.

Temp ^oC

Min.

Max.

23-27

37-42

24-25

37-42

28-31

39-44

23-25

34-41

26-30

35-42

29-31

41-45

RH (%) Max.

Min.

73-86

37-39

74-81

31-50

57-67

24-36

82-86

39-41

59-72

26-48

37-65

18-44

Wind

10-25

km/hr

10-30

km / hr 

10-30

km/ hr.

10-25

 km/ hr

10-35

km / hr.

 10-35

km / hr.

Growth Stage (Days after pruning)

Likely disease risk

Downy mildew

Powdery mildew

Bacterial leaf spot

Rust

20-30 days after Foundation pruning

  Nil

Low

Nil

Nil

All grapes areas partially cloudy conditions will be present, while in Sangli Solapur area ocasionally overcast conditions will be seen. Last few days there was decrease in maximum temperature, which will remain same for two more days and then will cross above 40oC after Friday and may again increase up to 42 oC in Sangli area and up to 44oC in Solapur area. Increase in Temperature will also coincide with increase in RH. Maximum RH in all areas will increase up to 85 %.

Increase in RH, and cloudy conditions are likely to be favorable for the infection of powdery mildew. Prevalence of high temperatures reduce the auxin levels due to which there will be suppression of apical dominance. It will give bushy appearance to new shoots which are growing after sub-cane. Such bushy growth will create favorable microclimate for powdery mildew.

For the control of powdery mildew spray of Sulphur 80WG, 1.5 to 2.0 g / L is suggested. In case of high vigor of shoots spray of triazole fungicides, such as hexaconazole 5EC, 1.0 ml / L or flusilazole 40EC, 25 ml / 200 l water will be useful, as in addition to control of powdery mildew, such sprays will reduce vigor. Addition of 2 to 3 g of mono potassium phosphate or SOP per lit. in these fungicide sprays will help in increasing K levels and vines will be more resistant to powdery mildew infections.

वृद्धि अवस्था (फॉरवर्ड प्रूनिंग के पश्चयात)

संभावित पीडक जन्तु जोखिम

थ्रिप्स

माइट्स

केट्र्पीलर्स

मिलीबग्स

जेसीड्स

20-30

अधिक

नहीं

मध्यम

मध्यम से अधिक

नहीं

मिलिबग के नियंत्रण के लिए मिथोमिल 40 एस पी @ 1.0 ग्राम प्रति लिटर या बुप्रोफेज़िन 25 एससी @ 1.25 मिलि प्रति लिटर पानी का प्रयोग किया जा सकता है। थ्रिप्स एवं केट्र्पीलर्स दोनों को नियंत्रित करने के लिए इमामेक्टिन बेन्ज़ोयट 5 एसजी @ 0.22 ग्राम/लीटर की दर से छिड़काव किया जा सकता है।

Growth Stage (Days after foundation pruning)

Likely Pest Risk

Thrips

Mites

Caterpillars

Mealybugs

Jassids

0-7

High

Nil

Moderate

Moderate to High

Nil

For the management of mealybugs, spot application of Methomyl 40 SP @ 1.0 g/L or Buprofezin 25 SC @ 1.25 ml/L water can be given. To control both thrips and caterpillars, application of emamectin benzoate 5 SG @ 0.22 g/L water is helpful.

Disclaimer: The bio-efficacy of insecticides mentioned above is based on the experiments conducted by NRCG. Their use by the farmers is restricted to their CIBRC label claim for various crops.