CROP WEATHER SITUATION
METEOROLOGICAL DATA OF
ICAR-INDIAN INSTITUTE OF HORTICULTURAL RESEARCH
HESSARAGHATTA LAKE P.O., BANGALORE – 560 089
Period: 16th to 31stJanuary, 2023
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 |
||||
|
January (16 - 31) 2023 |
28.3 |
11.2 |
76.6 |
36.1 |
4.36 |
3.03 |
0.00 |
|
(28.8) |
(12.9) |
(84.0) |
(44.5) |
(4.1) |
(3.3) |
(0.2) |
|
* Figures in the parentheses indicate the mean values during the corresponding period for the previous 5 years
Fortnight from 16th to 31stJanuary, 2023
During the Second fortnight of the month i.e., 16th to 31st January, 2023, the mean maximum and mean minimum temperature increased by 0.6 ºC and 1.25 ºC respectively as compared to previous fortnight. The mean maximum temperatures increased by 0.6 ºC and mean minimum temperature decreased by 0.9 ºC as compared to the mean values of the corresponding period for the previous five years. The percent relative humidity in the morning decreased by 4.5 % and in the afternoon increased by 0.6 % as compared to the previous fortnight. There is no rainfall reported during this fortnight.
Crop weather situation
In the fields with vegetables, in addition to frequent irrigation mulching may be provided to conserve moisture and to ensure prolonged availability of irrigated water to the plants. Spraying vegetable special may be followed for better yield & quality of vegetable crops. Spraying with Mango special in mango orchards can be taken up along with adequate irrigation.
Incidence of insect pests
Under the prevailing weather situation, following pests are expected under Bangalore conditions on various horticultural crops. Various management options for their management are mentioned below.
Hoppers on mango:
- Incidence of hoppers is expected on mango. Spray Azadirachtin 10000 ppm @ 3 ml/L, if the hopper population is low to moderate. If the number exceeds 4 per panicle spray with imidacloprid 200 SL @ 0.3 ml/l or lambda cyhalothrin 5 EC @ 0.5 ml/l at early panicle emergence. This will also take care of thrips. Addition of sticker is essential. Avoid spraying on full bloom to protect pollinators.
- For organic orchards, application of the entomopathogen Metarhizium anisopliae formulation @ 5ml/L is recommended.
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. The larvae roll 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 indoxacarb 14.5 SC @ 0.75ml/l or spinosad 45 SC @ 0.3ml/l, if the incidence is very high. Proper waiting periods are to be followed before harvest of tomatoes.
Black thrips on chilli (tentative management only)
- Black thrips incidence is increasing on chilli and capsicum; it is advised to farmers 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 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+, neemoil 2.5ml/litre, fipronil 80WG@40g/acre, Fipronil40%+ imidaclorpid40%@40g/acre, Cyantraniliprole 10%@240ml/acre, acetamiprid20SP@40g/acre, spirotetramat150 OD@160ml/acre, pongamia oil 2.5ml/litre
- Every 15days interval chlorpyrifos soil drenching is required to kill pupa that are in soil (only under outbreak conditions).
Note: None of the above-mentioned chemicals are approved by CIBRC, it’s only an adhoc recommendation
Aphids on cucurbits
- Aphid infestation may increase on different cucurbits. Spray imidacloprid 200 SL @ 0.5 ml/l or thiamethoxam 25 WG @ 0.3 g/l for their management.
Aphids on Beans and rose
- Aphids incidence is observed on beans and rose. Thoroughly spray neem soap or Pongamia soap (1 %) or pulverised neem seed powder extract (NSPE) 4 % for their management.
Thrips on rose
- For the management of thrips on rose, spray fipronil 5 SC @ 1.5 ml/litre or imidacloprid 200 SL @ 0.5 ml/l.
Mites on tomato
- Incidence of mites is observed and may increase on tomato.For their management spray spiromesfin 22.9 SC @ 1 ml/l or fenazaquin 10 EC@ 3 g/L.
Mites on Rose
- During the period, incidence of mites is observed heavily on roses grown under polyhouse conditions. Spray spiromesfin 22.9 SC @ 1 ml/l for their management.
Disease scenario
Disease management advisories based on the weather data of second fortnight of January 2023
Fruit crops:
Grapes
- Rust might continue to be noticed in grape vine orchards (var Bangalore Blue) and could be managed by the treatment with Chlorothalonil 75%WP 2g /L/ Mancozeb 75% WP (2 g/L ) along with sticker @ 0.5 ml/ l.
Vegetable crops:
Chilli
- Powdery mildew incidence will be high in chilli. To manage this disease foliar spray of Tebuconazole 25% WG (1.5g/L) or Azoxystrobin 18.2% w/w + difenoconazole 11.4% w/w SC @1ml/L or Tebuconazole 50% + Trifloxystrobin 25% WG (0.5g/l) at 10 -12 day intervals (2-3 sprays) is required.
Ornamentals:
Rose
Cool and dry weather conditions favour powdery mildews development in rose. The disease can be effectively managed by spraying Azoxystrobin 23% SC @1ml/L or Tebuconazole +Trifloxystrobin @ 1ml/L 2 times at 1
