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IIHR weather report

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CROP WEATHER SITUATION

METEOROLOGICAL DATA OF

ICAR-INDIAN INSTITUTE OF HORTICULTURAL RESEARCH

HESSARAGHATTA LAKE P.O., BANGALORE – 560 089

 

 

Period: 16th to 28th February, 2019

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 1.30PM

February

16th to 28th,

2019

33.5

13.9

66.8

28.4

6.57

4.49

0.0

(30.4)

 

(15.8)

(61.8)

(33.3)

(5.5)

(3.6)

(0.0)

 

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

 

Fortnight from 16th to 28th February, 2019

During the second fortnight of the month i.e., from January 16th to 28th, 2019, the average maximum temperature was higher by 3.60C and the minimum temperature was lower by 1.80C respectively, as compared to the previous fortnight. The average maximum and minimum temperatures were higher by 1.60C and 0.70C, respectively, as compared to the average values of the corresponding period for the previous five years. The percent relative humidity during morning and afternoon were lower by 9.9% and 14.7% respectively, as compared to the previous fortnight. There was no rainfall during the fortnight.

Crop weather situation

The average maximum temperature during this period was higher than the average for the last five years. The evaporation was higher with no rainfall during the above period. Because of high evaporation rate and low rainfall supplemental irrigation may be given.

 

Incidence of pests and diseases

Under the prevailing weather conditions, the following pests are expected in Bangalore on various horticultural crops.  Their management options are mentioned below.

Fruit Crops

Mango

Incidence of fruit flies is expected in early varieties. Setting up of methyl eugenol traps @ 15/ha is recommended.

Incidence of leaf hoppers is noticed in mango inflorescence. Spraying of imidachloprid 0.5 ml/l or fipronil 1 ml/l is recommended.

Guava

Incidence of tea mosquito bug is noticed spraying of lambda cyhalothrin @ 0.6 ml/l is recommended.

Custard Apple

In new flushes from pruned trees incidence of tea mosquito bug is noticed. Spraying of imidachloprid 0.5 ml/l or lambda cyhalothrin (0.003%)/ is recommended.

 

Vegetable Crops

Bhendi/Okra

Incidence of aphids and leaf hoppers is noticed, spraying with the thiochloprid @ 0.4 ml/l is recommended.

Drum Stick

Incidence of leaf eating caterpillar is noticed and spraying with the spinosad @ 0.4 ml/l is recommended.

Brinjal

The incidence of brinjal shoot and fruit borer can be expected. Spraying of [email protected] ml/l or [email protected] ml/l is recommended.

Cabbage

Incidence of diamond back moth is noticed. Spraying with the diafenthiuran 0.5gm/l) is recommended.

Tomato

Incidence of Tuta absoluta is noticed under polyhouse conditions.  Spray spinosad 45 SC @ 0.25 ml/l

Bitter gourd

Incidence of aphies is noticed and spraying of thiamethoxam 0.3gm/l is recommended.

Cucumber

Incidence of aphids and leaf hoppers is noticed, spraying with the thiochloprid @ 0.4 ml/l is recommended.

Floriculture

Gerbera

Under polyhouse conditions thrips incidence is more. Spray [email protected]/l.

Rose

Thrips incidence is noticed on rose under polyhouse condition.  Spray Fipronil 5 SC @ 1.5 ml/l. If the problem persists after one week also, sprays pinosad 45 SC @ 0.25 ml/l.

*Safe waiting periods are to be followed as per the label claims

Disease Scenario

Disease forecast based on weather parameters during the second fortnight of February, 2019.

Fruit Crops

Mango

Powdery mildew requires attention. At this point of time application of wettable suphur is not advisable because of high temperature. Anthracnose spots might further increase on foliage. Application of Mancozeb + Dinocap (Dikar) (0.3%) or Tridemorph (0.1%) or Hexaconazole (0.1%)  is recommended for the disease management. Severity of Anthracnose spots might increase. Application of Difenoconazole (0.05%) or Thiophanate methyl (0.1%) is recommended along with sticker @ 0.5 ml/ l.

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%).

Grape

Anthracnose may be noticed. For anthracnose application of Difenoconazole (0.05%)/ Thiophanate methyl (0.1%),/ Carbendzim + Mancozeb (0.2%) /Bitertanol (0.2%)  whereas for powdery mildew Application of Azoxytrobin (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.

Vegetables

Anthacnose in vegetables will increase especially in chillies.  For anthracnose application of Difenoconazole (0.05%)/ Thiophanate methyl (0.1%),/ Carbendzim + Mancozeb (0.2%) /Bitertanol (0.2%) along with sticker 0.5ml/l will be effective.

Virus diseases

Change in weather especially low humidity with increase in temperature favours sucking pests which are vectors of many virus diseases.  Seed treatment with imidacloprid or spray of acephate (0.2%) will be effective in controlling vector population.