Sample Heading

Sample Heading

IIHR weather report

Primary tabs

 

CROP WEATHER SITUATION

METEOROLOGICAL DATA OF

ICAR-INDIAN INSTITUTE OF HORTICULTURAL RESEARCH

HESSARAGHATTA LAKE P.O., BANGALORE – 560 089

CROP WEATHER SITUATION

METEOROLOGICAL DATA OF

ICAR-INDIAN INSTITUTE OF HORTICULTURAL RESEARCH

HESSARAGHATTA LAKE P.O., BANGALORE – 560 089

 

Period: 16th to 30th September, 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

September

16th to 30th, 2019

29.0

20.4

90.6

70.4

3.36

3.38

12.94

(28.4)

(20.5)

(80.9)

(56.9)

(3.1)

(3.7)

(96.1)

 

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

 

Fortnight from 16th to 30th September, 2019

During the Second fortnight of the month i.e., from September 16th to 30th, 2019, the average maximum temperature was higher by 0.8°C and minimum temperature was lower by 0.4°C, respectively, as compared to the previous fortnight. The average maximum temperature was lower by 0.10C whereas the minimum temperature remains the same, respectively, as compared to the average values of the corresponding period for the previous five years. The percent relative humidity during morning was higher by 2.8% and during afternoon it was lower by 0.7% respectively, as compared to the previous fortnight. There was 12.94 mm rainfall during the fortnight.

Crop weather situation

In the second fortnight of September there was only marginal difference in mean temperature with that of average for the last five years. The relative humidity both during morning hours and in the evening was relatively higher. The total precipitation receive was far less compared to the same period as average for the last five years. Need based application of micronutrient for crops like banana through foliar application is desirable. Liberal application of FYM is recommended. The weather during the fortnight was excellent for growing oyster mushroom. Shiitake mushroom could be grown with additional cooling.

 

Incidence of pests and diseases

Under the prevailing weather conditions, the following pests were observed in Bangalore on various horticultural crops during Second fortnight of September, 2019. Pest management options are mentioned below.

Fruit Crops:

Mango shoot borer

Clip and destroy affected shoots.

Spray acephate 50 [email protected] 1.5 g/l or Quinalphos 25 EC @ 2ml/l at the time of emergence of new flush. This will also take care of leaf eating weevil, Rhynchaenus mangiferae.

Webber and ash weevil on Mango

Incidence of webber and ash weevil become serious on new leaves.  Remove webbed leaves wherever possible and burn them. Spray quinalphos @ 2 ml/l or lamda cyhalothrin @ 1ml /l for their management.

Pomegranate

Fruit sucking moth

Wherever matured fruits are there fruit sucking moth damage is expected. Netting the orchards is recommended

Grapes

Thrips, Scirtothrips dorsalis is expected to occur on leaves of newly pruned Bangalore Blue. Spray fipronil 5 SC @ 1.5ml/L

Vegetable Crops

Fruit fly on cucurbits

For the management of fruit fly on cucurbits, following integrated approach may be followed. Deployment of 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

Tomato moth

Install tuta pheromone traps for monitoring of the adults @ 4-6 traps/acre

Spray indoxacarb @ 0.75 ml/litre or spinosad45 SC @ 0.3ml/L

Tobacco caterpillar on Tomato

For the management of this pest, spray indoxacarb @ 0.75 ml/L or thiodicarb @ 1 g/L

Leaf hopper on okra/Bhendi

Incidence of jassids is observed on okra.  Spray imidacloprid @ 0.3 ml/l, if the crop is at pre-flowering stage. Otherwise, spray neem or pongamia soaps @ 1 %, thoroughly covering lower surface of leaves

Floriculture

Thrips on rose

Incidence of rose thrips was observed more under polyhouse conditions. Spray acepthate @ 1 g/l or imidacloprid @ 0.5 ml/l for its management

Whitefly on Gerbera

For the management of whitefly on gerbera spray dinetofuran20SG @ 1 g/l or [email protected] 1ml/litre followed by spirotetramat 240 SC @ 1ml/litre. Install yellow sticky traps coated with adhesive or sticky glue at crop canopy level for monitoring adult whitefly population

 

Disease Scenario

Disease forecast based on the weather data for second fortnight of September, 2019

Fruit crops

Grape   

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

Mango

Sooty mould should be 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%)

Anthracnose spots may 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

Banana

Intensity of Sigatoka leaf spot (Mycospheralla  sp.), crown rot (  Fusarium moniliforme & Botryodiplodia  theobromae) and anthracnose (Colletotrichum musae ) of fruits may be increased compared to last fortnight. Sigatoka could be managed by spraying Carbendazim (0.1%) or Thiophanate methyl (0.1%) or Tridemorph (0.1%)/ whereas crown rot and anthracnose 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

Macrophoma spots may appear on the fruits of Robusta varieties of banana. Application of Carbendazim (0.1%) or Thiophanate methyl (0.1%) is recommended for managing the same

Pomegranate

Intensity of leaf and fruit spot disease caused by Pseudocercospora punicae and anthracnose of fruit and leaf (C. gloeosporioides) may remain moderate. 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. This will avoid spread of scab disease also.  Regular spray of copper oxychloride (0.2%) or Bordeaux mixture (1%) along with streptocycline 0.5g/l is to be continued to avoid spread of nodal blight

 

Vegetable Crops

Leaf blight of tomato and potato by Phytophthora infestans

Since the rainfall was heavy in the last fortnight, there is higher spread of late blight. If blight has not started, preventive spray of chlorothalonil or copper oxy chloride at 0.2% is recommended.  In case of severe infection, spray of fenamidone + dithane M 45 (Sectin) at 0.1% is recommended

Powdery mildew in solanaceous vegetable crops

Spray of wettable sulphur or dithane M 45 after the appearance of the powdery mildew symptoms. In case of severe infection hexaconazole at 0.1% is recommended

 

Ornamental crops

Incidence of rose powdery mildew is expected to increase.  In case of severe infection hexaconazole 0.1% or azoxystrobin 0.1% will reduce the disease spread