IIHR WEATHER REPORT AND CROP ADVISORIES
METEOROLOGICAL DATA OF
ICAR-INDIAN INSTITUTE OF HORTICULTURAL RESEARCH
HESSARAGHATTA LAKE P.O., BANGALORE – 560 089
Latitude : 13o 7’ N Longitude: 77o29’ E Altitude: 890 M
|
Date |
Temperature |
Relative Humidity |
Evaporation |
Wind speed |
Rainfall |
||
|
- |
oC |
% |
mm |
km/h |
mm |
||
|
|
Mean Max. |
Mean Min. |
Mean At 8.30 am |
Mean At 1.30 pm |
|
|
|
|
12.01.2025 |
29.3 |
18.2 |
95 |
54 |
3.6 |
2.34 |
0.0 |
Period: 16th to 31st December, 2024
Latitude : 13071 N Longitude : 720291E Altitude : 890 M
|
Fortnight |
Temperature (0C) |
Relative Humidity (%) |
Evaporation (mm) |
Wind speed (km/h) |
Total Rainfall (mm) Mean Max. |
||
|
Mean Max. |
Mean Min. |
Mean At 7.30AM |
Mean at 1.30 PM |
||||
|
December (16-31) 2024 |
26.97 |
16.24 |
92.25 |
67.31 |
3.06 |
2.18 |
5.00 |
|
(26.4) |
(14.4) |
(84.4) |
(53.5) |
(3.4) |
(3.6) |
(0.00) |
|
* Figures in the parentheses indicate the mean values during the corresponding period for the previous 5 years
Fortnight from 16th to 31st December, 2024
During the second fortnight of the month i.e., 16th to 31st December, 2024, the mean maximum temperature increased by 0.68ºC and mean minimum temperature decreased by 3.09ºC as compared to the previous fortnight. The mean maximum and minimum temperature decreased by 0.4ºC and 2.7ºC respectively as compared to the mean values of the corresponding period for the previous five years. The percent relative humidity in the morning and afternoon decreased by 0.02% and 5.42% respectively as compared to the previous fortnight. There was 5.00 mm rainfall recorded during this fortnight.
Crop weather situation
Top dressing of fertilizers may be given to rabi vegetables. Foliar spray of Arka mango special for mango, Arka banana special for banana and Arka vegetable special for vegetables may be given to improve growth.
Incidence of insect pests
Under the prevailing weather situation, following pests are expected under Bengaluru conditions on different horticultural crops. Various management options for their management are mentioned below.
Hoppers on mango
- Incidence of hoppers is observed 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 17.8 SL @ 0.5 ml/l or *oxydemeton – methyl 25% EC @ 2 ml/l or *dimethoate 30% EC @ 2ml/litre at early panicle emergence.
Flower webbers/inflorescence caterpillars on mango
- Besides hoppers, inflorescence caterpillars which web the flowers and feed inside are potential pests on mango during January. Application of lambda cyhalothrin 5EC @ 0.5ml/L or cypermethrin 25 EC @1ml/L are useful to control the pest.
Banana skipper
- Skipper butterfly is becoming is serious pest on banana. Larva rolls the leaves and feed by remaining inside. Affected leaves to be mechanically removed and destroyed. In case of severe infestation, spraying of quinolphos 25EC @ 2ml/L or chlorpyrifos 20EC @ 2.5ml/L is advised
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 *flubendiamide 20 WG @0.2g/l, *indoxacarb14.5SC @ 0.5ml/l, if the incidence is very high. Proper waiting periods are to be followed before harvest of tomatoes
Tomato moth
- Install tuta pheromone traps for monitoring of the adults @ 4-6 traps/acre
- Spray indoxacarb 14.5SC @ 0.75 ml/litre or spinosad 45SC @ 0.3ml/l
Midge on chillies
- Severe incidence of midges is observed on chilli which causes maximum damage at flowering stage. Spray thiamethoxam25WG @ 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/l
Thrips parvispisnus on chilli
- Black thrips incidence is increasing on chilli and capsicum; it is advised to raise seedlings under nylon mesh thrips proof conditions, use thrips free seedlings
- Barrier crop: sow maize all along the border 30 days before chilli transplantation
- Root dipping of the seedlings in imidacloprid 17.8 SL solution @ 0.5 ml per litre of water for one hour during transplanting
- After planting: regular alternate weekly spraying of imidacloprid 17.8 SL 0.5ml/litre+ neem oil 2.5ml/litre, fipronil80WG@40g/acre, Fipronil 40%+ imidaclorpid40%@40g/acre, Cyantraniliprole10OD@240ml/acre, acetamiprid20SP@40g/acre, spirotetramat150 OD@160ml/acre, pongamia oil 2.5ml/litre
or
- Spray twice @ minimum 15 days interval in a crop cycle Isocycloseram 9.2% (w/w DC) + Isocycloseram10% (w/v DC) * @ 1.2ml/liter
- Every 15days interval (depending upon the outbreak) chlropyrifos 50EC (2.5ml/l) soil drenching is required to kill pupa that are in soil.
- Note: None of these chemicals are approved by CIBRC except isocyloseram
Aphids on cucurbits
- Aphid infestation may increase on different cucurbits. Spray imidacloprid 17.8SL@ 0.5 ml/l for their management
*CIBRC approved, others not in the CIBRC list are based on reports
Disclaimer: Wherever label claim not available, recommendations are made based on experimental results
Disease scenario
Disease scenario in relation to the weather data during second fortnight of December, 2024.
Vegetable crops:
Chilli
- Powdery mildew and anthracnose severity increases in chilli under prevailing conditions. Foliar application of difenoconazole 25% EC (0.5ml/l) or azoxystrobin 18.2% w/w + difenoconazole 11.4% w/w SC (1ml/l) or tebuconazole 50 + trifloxystrobin 25%WG @0.6g/L is required to manage this disease
Onion
- In onion purple blotch severity increases with prevailing dew condition. To manage this disease spray dithane M-45@ 2.5g/litre or tebuconazole 50+trifloxystrobin 25%WG @ 0.6g/L.
Fruit Crops
Mango
- First spray on to control powdery mildew with Hexaconazole 5% EC (1ml/l). Avoid sprays if flowering is more than 50%.
Flower and Medicinal Crops
Rose & Gerbera
- Powdery mildew severity increases. Spray azoxystrobin or propiconazole @ 0.5 ml/L.
