Weather Based Crop Advisory

IIHR WEATHER REPORT AND CROP ADVISORIES

METEOROLOGICAL DATA OF    

ICAR-INDIAN INSTITUTE OF HORTICULTURAL RESEARCH

HESSARAGHATTA LAKE P.O., BANGALORE – 560 089

Latitude : 13^o 7’ N                              Longitude: 77^o29’ 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
20.01.2025	28.0	10.3	95	50	5.4	1.91	0.0

 

Period: 1^st to 15^th January 2025

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 Min.	Mean At 7.30AM	Mean at 1.30 PM
January (1-15) 2025	27.4	13.8	93.67	55.67	4.17	2.65	0.00
	(27.84)	(14.98)	(83.21)	(50.93)	(3.54)	(3.85)	(0.27)

 

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

 

Fortnight from 1^st to 15^th January, 2025

During the First fortnight of the month i.e., 1^st to 15^th January 2025, the mean maximum temperature increased by 0.43ºC and mean minimum temperature decreased by 2.44ºC as compared to the previous fortnight. The mean maximum and minimum temperature increased by 1.44^ºC and 0.58ºC respectively as compared to the mean values of the corresponding period for the previous five years. The percent relative humidity in the morning increased by 1.42% and in the afternoon decreased by 11.64% as compared to the previous fortnight. There was no rainfall recorded during this fortnight.

 Crop weather situation

For banana ZnSO₄ @ 0.5%, FeSO₄ @ 0.2 %, CuSO₄ @ 0.2 % and H₃BO₃ @ 0.1 % may be applied. For transplanted rabi vegetables, Arka vegetable special may be applied through foliar spray. If deficiency symptoms of micronutrients appear, corrective foliar application with the deficient micronutrient can be taken up.   

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 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 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 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 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 first fortnight of January, 2025.

Vegetable crops:

Chilli: 

• Powdery mildew severity increases in chilli.  Spray Tebuconazole 50% + Trifloxystrobin 25% WG @0.5g/l at 10 -12 day intervals.

Tomato:         

• Change in weather especially low humidity with increase in temperature favours sucking pests which are vectors of many virus diseases.  Spray neem oil (2ml/L) to manage sucking pests and give separate spray of sea weed extract Sagarika (2ml/L) to enhance plant tolerance to virus  

Fruit Crops

Mango

• Powdery mildew severity increases on flower and foliage. Spray Hexaconazole5%Ec @1ml/L   is recommended for the disease management. Avoid spraying at peak flowering stage.

Flower and Medicinal Crops

Rose & Gerbera

• Powdery mildew severity increases in rose. To manage this disease spray azoxystrobin 23% SC @ 0.5 ml/ L along with adjuvant@ 0.5ml.