CROP WEATHER SITUATION
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 |
|
|
|
25.07.2024 |
27.4 |
21.9 |
91 |
73 |
3.3 |
8.46 |
3.9 |
Period: 1st to 15th July, 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 |
||||
July (1 - 15) 2024 |
29.17 |
21.62 |
89.73 |
68.73 |
4.79 |
6.38 |
35.00 |
(29.0) |
(20.6) |
(85.9) |
(65.7) |
(4.1) |
(6.5) |
(62.3) |
* Figures in the parentheses indicate the mean values during the corresponding period for the previous 5 years
Fortnight from 1st to 15th July, 2024
During the first fortnight of the month i.e., 1st to 15th July, 2024, the mean maximum temperature decreased by 0.86ºC and mean minimum temperature increased by 0.04ºC as compared to the previous fortnight. The mean maximum temperature decreased by 0.9ºC and mean minimum temperature remains unchanged as compared to the mean values of the corresponding period for the previous five years. The percent relative humidity in the morning and in the afternoon increased by 2.73% and 3.86% respectively as compared to the previous fortnight. There was 35.00 mm of rainfall reported during this fortnight.
Crop weather situation
Low rainfall, high temperature and high evaporation has been recorded in the last fortnight. Basal dose of FYM and fertilizer application may be taken up for kharif vegetable crops, wherever soil moisture is conducive. Foliar application of Arka Vegetable Special may be given for standing vegetable crops. Basin cleaning and fertilizer application may be carried out in perennial fruit crops.
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.
Mango stem borer:
This period coincides with the emergence of adult beetles of trunk borer, Batocera rufomaculata. Plug active holes (can be diagnosed with the presence of fresh chewed wood material and excreta) with cotton dipped in chloropyrifos 20EC @ 5ml/L and close with mud. In case of severe infestation IIHR developed Sealer cum Healer can be used.
Fruit fly on cucurbits:
For the management of fruit fly (Bactrocera cucurbitae) on cucurbits, following integrated approach may be followed. Installing 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.
Thrips, Scirtothrips dorsalis on chilli
- Grow border crop like maize 20-25 days before transplantation of main crop
- Install blue sticky traps @ 12-15/acre
- Need based spray of fipronil 5SC* @ 1.5 ml/l or spinetoram 11.7 SC@ 1ml/litre or spinosad 45 SC @ 0.5ml/litre alternating with imidacloprid 200 SL @ 0.5 ml/l at fortnightly interval if the crop is at early stage of infestation.
- Addition of 2 ml of neem oil or pongamia oil per every litre of insecticide spray solution enhances the efficacy of the chemicals against the pest
Cut worms
- Incidence of cutworms may be seen up to 15-20 days after transplantation of vegetable
crops - Young seedlings will be cut at ground level by cut worm larvae during night time
- Drench the soil around the root zone of the crop with Chlorpyrifos 20 EC @ 5ml/l for
killing larvae in the soil
Legumes pod borer
- Need based Spray spinosad 45 SC @ 0.5ml/litre or indoxacarb14.5 SC @
0.75ml/litre at 10 days interval from flowering stage
Root-knot nematode in tomato
- Raise healthy transplants on soil applied with FYM or vermicompost @5 tons/ha enriched with Trichoderma harzianum @ 2kg + Paecilomyces lilacinus @ 2kg + Pseudomonas fluorescens @2kg /ton of FYM.
- In standing crop, apply neem cake enriched with above biopesticides @ 50g/ m2. This can also be mixed with water and applied as soil drench @ 2l/m2. The same can be thoroughly filtered and sent along with drip or sprayed.
Root-knot nematode in Okra
- Seed treatment with Trichoderma harzianum or Pseudomonas fluorescens @ 15-20g/kg seed.
- Soil application of FYM or vermicompost @5 tons/ha enriched with Trichoderma harzianum @ 2kg + Paecilomyces lilacinus @ 2kg + Pseudomonas fluorescens @2kg /ton of FYM..
- In standing crop, apply neem cake enriched with above biopesticides @ 50g/ m2. This can also be mixed with water and applied as soil drench @ 2l/m2.. The same can be thoroughly filtered and sent along with drip or sprayed.
Whitefly on Gerbera (polyhouses)
- Install yellow sticky traps coated with adhesive or sticky glue at crop canopy level for monitoring adult whitefly population.
- Spray Neem soap @ 10g/liter followed pongamia soap @ 10 g / liter
- Need based spray diafenthiuran 50WP @ 1 g/l followed by dinetofuran 20SG @1g/litre
Rose Thrips,
- Grow border maize or sorghum to prevent pest migration
- Install blue sticky traps
- Spray imidacloprid 17.8 ml/l or dimethoate 30 EC @ 2ml/l with pongamia oil 0.5%.
- Apply Fipronil 5 SC @ 1.5 ml/l in case of severe infestations.
- Drench the soil with Chlorpyrifos 20 EC @ 5ml/l for killing pupae in the soil.
Midge on crossandra
- Incidence of midge is increasing on crossandra. For its management spray imidacloprid 17.8 SL@ 0.5 ml/l.
*CIBRC label claim available
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 July, 2024.
Fruit crops:
Papaya
- Foot rot caused by Pythium spp. and Phytophthora spp. occurs due to continuous rains. Avoid water logging by providing proper drainage to remove excess water. Application of farmyard manure or neem cake enriched with Trichoderma harzianum helps in preventive management. If disease is noticed in few plants, drench with copper oxychloride 50%WP (2.5g/l).
Vegetable crops:
Tomato
- Late blight starts appearing in lower most soil touching lines. Remove lower most old and diseased leaves and give foliar spray of curative foliar spray of famoxadone 16.6%+ cymoxanil 22.1% SC (1g/l) or metiram 55% + pyraclostrobin 5% WG (3g/l).
Onion
- Anthracnose and purple blotch are likely to aggravate under current weather situation. To protect crop from these diseases give foliar spray with Zineb 75% WP @ 2g/L, if already disease is noticed in severe form give foliar spray with Difenoconazole 25% EC (1ml/Litre)
Flower Crops:
Chrysanthemum
- Leaf and flower blight caused by Alternaria spp. gets aggravated due to prevailing rains. To manage this disease spray difenoconazole 25% EC (0.5ml/l) or tebuconazole 20 EC (25.9% W/W) (0.5ml/l) .