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IIHR weather report

CROP WEATHER SITUATION

METEOROLOGICAL DATA OF

ICAR-INDIAN INSTITUTE OF HORTICULTURAL RESEARCH

 HESSARAGHATTA, BANGALORE – 560 089

 
 

Period: 16th to 31st December, 2016

 

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

 

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

December

16th to 31st ,

2016

28.0

 

(27.7)

17.0

 

(16.5)

73.00

 

(76.7)

37.00

 

(50.6)

4.0

 

(4.2)

2.0

 

(4.1)

0.0

 

(0.6)

 

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

 

Fortnight from 16th to 31st December, 2016

 

During the second fortnight of the month i.e., from December 16th to 31st, 2016, the average maximum temperature was higher by 2.00C while average minimum temperature was lower by 1.00C, as compared to the previous fortnight. The average maximum temperature was higher by 0.90C and average minimum temperature was lower by 0.60C respectively, as compared to the average values of the corresponding period for the previous five years. The percent relative humidity during morning and evening were lower by 3.6% and 3.0% respectively, as compared to the previous fortnight. There was no rainfall during the fortnight.

 

Crop weather situation

 

This is the mango flowering period. The weather is dry farmers are advised to undertake foliar spray of mango special after completion of pollination and fruit set. Vegetable crops also to be sprayed with vegetable special. Wherever possible soil surface must be mulched to prevent evaporation of water.

 

Incidence of pests and diseases

 

Plant protection measures – prevailing weather conditions

 

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

 

Hoppers on mango:

 

  • Wherever flowering started, incidence of hoppers is expected to occur on mango. Spray Azadirachtin 3000 ppm @ 2 ml/l, if the hopper population is low to moderate. If the number exceeds 4 per panicle spray with imidacloprid 200 SL @ 0.25 ml/l. If blossom webber is noticed, spray  lambda cyhalothrin 5 EC @ 0.5 ml/l at early panicle emergence. Add stickers for enhancing the efficacy.

 


Tomato fruit borer:

 

  • With the prevailing weather, incidence of tomato fruit borer may increase on tomato.  For its management, spray HaNPV @ 250 LE/ha during evening hours or spray indoxacarb  @ 1ml/l, if the incidence is very high. Proper waiting periods are to be followed before harvest of tomatoes.

 

Midge on chillies:

 

  • Severe incidence of midges is observed on chilli which causes maximum damage at flowering stage.  Spray thiamethoxam @ 0.3 g/l for their management.

 

Thrips on capsicum and chilli:

 

  • Incidence of thrips is increasing on capsicum grown under shade net/polyhouses and chilli grown under open conditions. Spray imidacloprid 200 SL @ 0.5 mL/L or fipronil 5 SC @ 1.5 ml/litre.

 

Aphids on cucurbits:

 

  • Aphid infestation may increase on different cucurbits. Spray imidacloprid @ 0.5 ml/l for their management.

 

Disease Scenario

 

Disease forecast based on weather parameters during the second fortnight of November 2016.

 

Fruit crops

 

Grape

 

  • Anthracnose and Powdery mildew infection are supposed to increase may be noticed. For anthracnose application of Chlorothalonil (0.2%) or Bitertanol (0.2%) or Dinocap (0.3%) + Mancozeb (2%) or thiophanate methyl (0.1%) whereas for powdery mildew Application of Myclobutanil (0.1%) or Triadimefon (0.1%) along with sticker @ 0.5 ml/ l is recommended for the management of disease.
  • Rust might continue to be noticed in grape vine orchards (var Bangalore Blue) and could be managed by the treatment with Chlorothalonil (0.2%) or Bitertanol (0.2%) or Dinocap (0.3%) + Mancozeb (2%) along with sticker @ 0.5 ml/ l.

 

Banana

 

  • Sigatoka leaf spot (Mycospheralla sp.), crown rot (Fusarium moniliforme & Botryodiplodia theobromae) and anthracnose (Colletotrichum musae) Macrophoma fruit spot disease needs proper attention. Sigatoka could be managed by spraying Carbendazim (0.1%) or Thiophanate methyl (0.1%) or Tridemorph (0.1%)/ whereas crown rot, anthracnose and Macrophoma fruit spot disease (Specially on var. Grand Naine) could be controlled by the pre-harvest sprays involving Carbendazim (0.1%) or Thiophanate methyl (0.1%), besides post harvest dip in Chlorine water (300 ppm) for 10 minutes.

 

Mango

 

  • Powdery mildew requires attention. At this point of time application of wettable suphur (0.2%) along with sticker @ 0.5 ml/L is recommended. Anthracnose spots might further increase on foliage. Application of Chlorothalonil (0.2%) or Thiophanate methyl (0.2%) or Carbendazim (0.1%) along with sticker (@ 0.5 ml / L) is recommended for the disease management.
  • Sooty mould should be still taken care. Application of Copper oxychloride (0.3%) along with sticker (@ 0.5 ml / L) is recommended. Further hopper and other insect management is important with suitable insecticides (Imidacloprid @ 0.5%).

 

Pomegranate

 

  • Intensity of leaf and fruit spot disease and anthracnose of fruit and leaf 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. 

 

Papaya

 

  • Infection of Black spot (Asperisporium caricae) may further increase. Whereas powdery mildew (Oidium caricae) infection may also be noticed 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. 

 

Vegetable crops

 

Crucifers

 

Powdery mildew

 

  • Spray wettable sulphur or tebuconazole at 0.2% at the beginning of the infection with sticker at 0.5ml per l of spray liquid with good coverage of the lower surface o the leaves.

 

Tomato

 

Powdery mildew

 

  • Spray hexaconazole or tebuconazole 0.2% at the begging of the infection with sticker as mentioned earlier

 

Medicinal Crops

 

Betel vine

 

Powdery mildew

 

  • Spray wettable sulphur at 0.2%. spray of systemic fungicides not recommended.  Maintenance of good aeration and proper drainage are important.

 

Ornamental Crops

 

Rose

 

Powdery mildew

 

  • Spray with azoxystrobin at 0.05% with sticker as mentioned above.

 

Black spot

 

  • Spray mancozeb 0.2% at the initial stages and trifloxystrobin or propiconazole (0.1%) if infection is severe at later stages.

 

 

 


Updated on 07.01.2017

 

 

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