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IIHR weather report

Period: 1st to 15th June, 2017

Latitude: 13071 N                   Longitude: 770 291E              Altitude: 890 M

CROP WEATHER SITUATION

METEOROLOGICAL DATA OF

ICAR-INDIAN INSTITUTE OF HORTICULTURAL RESEARCH

 HESSARAGHATTA, BANGALORE – 560 089

 

Fortnight

Temperature (0C)

Relative Humidity (%)

 

Evaporation

(mm)

 

Wind speed

(km/h)

 

Total Rainfall

(mm)

Average

Max.

Average

Min.

Average

At 7.30AM

Average at 1.30 PM

June

1st to 15th,

2017

29.3

21.2

78.5

63.0

3.74

3.86

9.35

(30.9)

 

(19.8)

     (75.8)

    (48.0)

    (5.1)

 (5.7)

 

(51.8)

*

Figures in the parentheses indicate the average values during the corresponding period for the previous 5 years

Fortnight from 1st to 15th June, 2017

During the first fortnight of the month i.e., from June 1st to 15th, 2017, the average maximum and minimum temperatures were lower by 2.30C and 0.30C respectively, as compared to the previous fortnight. The average maximum and minimum temperatures were lower by 0.60C and 0.30C respectively, as compared to the average values of the corresponding period for the previous five years. The percent relative humidity during morning was lower by 7.8% whereas during evening was higher by 11% respectively, as compared to the previous fortnight. There was 9.35mm rainfall during the fortnight.

Crop weather situation

The fortnight received very low rain compared to expected average rain during this time of the year. If the moisture available in the soil is sufficient for inter-culture it is time to take up inter-culture operations in standing crops.  Farmers may undertake measures to conserve soil moisture through use of mulches and other methods.  Wherever possible green manure crops may be grown and incorporated into the soil after sufficient growth.  Farmers are also advised to use organic manures to the possible extent to enhance water storage and nutrient availability. The weather data of the fortnight was suitable for the cultivation of Oyster Mushroom (Pleurotus spp.), Paddy straw mushroom (Volvariella spp) and Milky mushroom (Calocybe indica).

Incidence of pests and diseases

Under the prevailing weather situation, following pests are expected under Bangalore conditions on various horticultural crops. Various management options for their management are mentioned below.

Mango stem borer

  • This period coincides with the emergence of adult beetles of trunk borer, Batocera rufomaculata. Plug active holes (can be diagnosed with the presence of fresh hewed wood material and excreta) with cotton dipped in dichlorovos @ 5ml/L and close with mud. Affected tree trunks can be wrapped with nylon mesh to trap the emerging beetles.

Fruit fly on cucurbits

  • For the management of fruit fly (Bactrocera cucurbitae) on cucurbits, following integrated approach may be followed. Installing cue lure traps @ 10 traps/acre + Sanitation (complete destruction of infested fruits at each harvest) + Bait spray (Deltamethrin 0.1 % + jaggery @ 10g/L) at 10 days interval from the date of flowering.

Chilli Thrips

  • Spray fipronil 5SC(1.5 ml/l) or imidacloprid 200 SL (0.3 ml/l) alternately at fortnightly interval.

Root-knot nematode in tomato

  • Raise healthy transplants on soil applied with FYM or vermicompost @5 tons/ha enriched with Trichoderma harzianum @ 2kg + Paecilomyces lilacinus @ 2kg + Pseudomonas fluorescens @2kg /ton of FYM.
  • In standing crop, apply neem cake enriched with above biopesticides @ 50g/ m2. This can also be mixed with water and applied as soil drench @ 2l/m2. The same can be thoroughly filtered and sent along with drip or sprayed.

Whitefly on Gerbera (polyhouses)

  • Spray diafenthiuran @ 1 g/l followed by dinetofuran 1g/litre
  • Install yellow sticky traps coated with adhesive or sticky glue at crop canopy level for monitoring adult whitefly population.

Rose Thrips

  • Spray imidacloprid 17.8 ml/l or dimethoate 30 EC @ 2ml/l with pongamia oil 0.5%.
  • Apply Fipronil 5 SC @ 1.5 ml/l in case of severe infestations.
  • Drench the soil with Chlorpyrifos 20 EC @ 5ml/l for killing pupae in the soil.

Midge on crossandra

  • Incidence of midge is increasing on crossandra. For its management spray imidacloprid @ 0.5 ml/l.

Disease Scenario

Disease forecast based on weather parameters during the first fortnight of June, 2017.

Fruit crops

Mango

  • Anthracnose (C. gloeosporioides) and stem end rot (L. theobromae and P. mangiferae) are common in mango fruits during ripening. Pre-harvest sprays with Carbendazim (0.1%) or Thiophanate methyl (0.1%) followed by post-harvest treatments with Hot water (52oC) for ten minutes is recommended.

Grape

  • Grapevines should be continued to be protected against the infection of (i) downy mildew: by the application of 0.4g Dimethomorph  + 2.00 g Mancozeb /l or Metalyxl + Mancozeb (0.2%)/ Al Fosetyl (0.2%) along with sticker @ 0.5 ml/ l. Lower surface of the leaves on the vines to be sprayed properly (ii) anthracnose: spraying with Propineb (0.2%)/ Chlorothalonil (0.2%)/Carbendazim (0.1%)/ Thiophanate methyl (0.1%) are effective along with sticker @ 0.5 ml/ l.

Papaya

  • Infection of Anthracnose (C. gloeosporioides), Black spot (Asperisporium caricae) may further increase. Application of Chlorothalonil (0.2%), Carbendazim (0.1%)/ Thiophanate methyl (0.1%)/ Hexaconazole (0.1%) along with the sticker @ 0.5ml/l with good coverage of the lower surface of the foliage is recommended.

Pomegranate

  • Intensity of leaf and fruit spot disease caused by Pseudocercospora punicae and anthracnose of fruit and leaf (C. gloeosporioides) may increase further. Application of Chlorothalonil (0.2%) /Antracol (0.2%)/ Carbendazim (0.1%)/ Thiophanate methyl (0.1%)/ Hexaconazole (0.1%) along with the sticker @ 0.5ml/l is effective for the disease control.
  • Nodal Blight needs further attention. Application of COC (0.2%) + Streptocycline (300 ppm) /l along with the sticker @ 0.5ml/l should be applied at the interval of 15 – 20 days.

 

Guava

  • Canker (Pestalotiopsis psidi) in greenish immature guava fruits and styler end rot (Phomopsis psdi) and anthracnose (C. gloeosporioides) should be taken acre. For the disease management application of Zineb (0.3%) or Ziride (0.4%) followed with Carbendazim (0.1%)/ Thiophanate methyl (0.1%)/ along with sticker (0.5 ml /l) should be followed.

Vegetables

  • In cucurbits it is time to monitor the downy mildews.  Continuous rain and warm weather favour the disease.  Spray of metalaxyl at 0.2% will reduce the spread.  In tomato with the onset of monsoon the spread of buck eye spot damage on fruits may occur. This can be prevented by spray of copper oxy chloride at 3g/l and in severe cases spray with fenamidon + mancozeb at 0.2% will reduce the disease incidence. In chillies the leaf curl will spread further.  Suitable insecticides to be applied to control the insect vectors.

Ornamentals

  • The black spot of rose can be managed by spray with trifloxystrobin + tebuconazole at 0.1% at 15 days interval. For the downy mildews spray with metalaxyl + mancozeb at 0.2% will help.

Updated on 27.06.2017

 

 

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