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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: 1st to 15th March, 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

March

1st to 15th,

2019

34.1

17.6

62.8

30.60

7.1

4.18

0

(31.8)

 

(19.6)

(68.8)

(41.9)

(6.0)

(3.8)

(14.3)

 

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

 

Fortnight from 1st to 15th March, 2019

During the first fortnight of the month i.e., from March 1st to 15th, 2019, the average maximum and minimum temperatures were higher by 0.60C and 3.70C respectively, as compared to the previous fortnight. The average maximum and minimum temperatures were higher by 1.40C and 3.80C, 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 4.0% and in the afternoon it was higher by 2.2% respectively, as compared to the previous fortnight. There was no rainfall during the fortnight.

Crop weather situation

The average maximum and minimum temperatures were higher during this period when compared to the average for the last five years. This showed increase in diurnal temperature. The evaporation was higher with no rainfall during the above period. Because of high evaporation rate and low rainfall supplemental irrigation may be given. The meteorological data of the last fortnight was suitable for the cultivation of calocybe indica, Macrocybe crassa and volvariella volvaceae. Cultivation of Pleurotus and Lentinula spp. required additional cooling.

 

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 noticed in early varieties. Setting up of para pheromone traps (methyl eugenol traps) @ 06/acre is recommended.

Incidence of leaf hoppers is noticed in mango inflorescence. Spraying of imidachloprid 17.8 [email protected] 0.5 ml/l or fipronil 1 ml/l is recommended.

Guava

Incidence of fruit fly is noticed. Setting up of para pheromone traps (methyl eugenol traps) @ 06/acre is recommended.

Custard Apple

Incidence of fruit fly is noticed. Setting up of para pheromone traps (methyl eugenol traps) @ 06/acre is recommended.

 

Vegetable Crops

Tomato

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

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 lambda cyhalothrin (0.003%)/ 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. Alternatively, neem seed pellets (4%) or neem seed extract (4%) is ecofriendly.

Bitter gourd

Incidence of aphids 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.

Capsicum

Under polyhouse conditions thrips incidence is more. Spraying of 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 first fortnight of March, 2019.

Fruit Crops

Mango

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 17.8 SC @ 0.05%).

       Grape

Anthracnose infection may be noticed. For anthracnose application of Difenoconazole (0.05%)/ Thiophanate methyl (0.1%)/ Carbendzim + Mancozeb (0.2%) /Bitertanol (0.2%) along with sticker @ 0.5 ml/ l is recommended for the management of disease.

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.