कॉर्न पेस्ट मैनेजमेंट: सही दवा और मात्रा के साथ सही समय पर स्प्रे शेड्यूल
शेयर करना
Maize yields are most affected when spraying is done late or the same chemical is used repeatedly. Fall armyworm and stem borers cause the most damage during the whorl stage (20-35 days), while aphids attack during tasseling. The schedule below indicates which chemical, in what quantity, and on which day it should be applied.
Real problem for farmers: Why does damage occur even after spraying?
Most maize damage is not due to not spraying, but due to incorrect spraying:
- Late spraying: By the time the caterpillar has entered the whorl or stem, the chemical is ineffective.
- Repeated use of the same chemical: This reduces the effectiveness of the chemical on fall armyworm.
- Spraying without inspecting the field: Money is spent on chemicals that were not needed.
The correct method is to spray after observing the plant, not by a fixed date.
Identify by symptoms in the field
| What you see in the field | Potential pest | Stage |
|---|---|---|
| Central leaf dries up and pulls out easily (Dead Heart) | Shoot fly / Early stem borer | 0-15 days |
| Pinholes on unfurled leaves | Stem borer | 15-35 days |
| Wet sawdust-like frass inside the whorl, ragged leaves | Fall armyworm | 15-35 days |
| Sticky layer on leaves and cob, black mold | Aphid | 50-70 days |
| Caterpillar boring inside stem or cob | Pink borer / Cob borer | After 50 days |
25-30 day spray schedule: Including quantity (Whorl stage: Fall armyworm and Stem borer)
This is the most crucial spray of the season. At 25-30 days, maize is in the whorl stage. This is the time when caterpillars are active in the whorl but have not yet deeply penetrated the stem.
| Product | Active ingredient | Quantity per acre | Why use it | Product Page |
|---|---|---|---|---|
| Emaan 5 | Emamectin Benzoate 5% SG | 100 gm/acre | Effective against caterpillars hidden inside the whorl | Buy Emaan 5 |
| Krishikranti Lambda Knight | Lambda Cyhalothrin 5% EC | 250 ml/acre | Immediately kills caterpillars and moths | Buy Lambda Knight |
| Kala Amrit | Humic Acid (Premium) | 500 gm/acre | Strengthens roots, helps plant recover quickly after damage | Buy Kala Amrit |
How to spray:
- Mix in 150-200 liters of water per acre and spray directly into the whorl, not just on top.
- Spray in the morning or evening, do not spray in strong sunlight.
- Before mixing Emaan 5 and Lambda Knight, read both labels and perform a jar test in a small quantity.
- Kala Amrit can be applied with the spray or separately to the soil/leaves.
Full season spray schedule
| Crop stage | Days after sowing | Pest | What to do |
|---|---|---|---|
| Germination – Seedling stage | 0-15 days | Shoot fly, Termites | Thiamethoxam-based seed treatment at sowing |
| Whorl stage | 25-30 days | Fall armyworm, Stem borer | Emaan 5 (100 gm) + Lambda Knight (250 ml) + Kala Amrit (500 gm) See table above |
| Knee-high stage | 35-50 days | If symptoms appear, repeat stem borer/armyworm control | Change chemical, do not apply Lambda Knight twice consecutively |
| Flowering – Cob emergence | 50-70 days | Aphids, Pink borer | Thiamethoxam/Imidacloprid-based product for aphids; continue Emamectin Benzoate if pink borer is active |
See full range: Insecticides for Maize | Maize – All Products
Do's and Don'ts
Do's:
- Inspect the field before each spray. Spray based on what you see, not by date.
- For fall armyworm and stem borer, spray directly into the whorl.
- Help the plant recover with Kala Amrit or any other humic acid product.
- Change the chemical group with each spray.
Don'ts:
- Do not apply Lambda Cyhalothrin or any single chemical twice consecutively.
- Do not spray at noon during flowering, as this harms bees.
- Do not mix two chemicals without checking their labels.
- Do not wait for complete damage to appear; 25-30 days is the optimal time.
- Collection: Insecticides for Maize
- Collection: Maize – All Products
- Product: Emaan 5 Emamectin Benzoate 5% SG
- Product: Lambda Knight Lambda Cyhalothrin 5% EC
- Product: Kala Amrit Premium Humic Acid
- Blog: Fall Armyworm in Maize: Identification, Symptoms, Damage, and Control
- Blog: Caterpillar Control in Maize Crop During Early Monsoon
- Blog (Hindi): Armyworm in Maize: Symptoms and Treatment
Frequently Asked Questions (FAQ)
What is the best medicine for Fall Armyworm in maize at 25-30 days?
A mixture of Emamectin Benzoate 5% SG (100 gm/acre) and Lambda Cyhalothrin 5% EC (250 ml/acre) sprayed into the whorl provides control for both fall armyworm and stem borers.
What is the quantity of Emaan 5 to be applied per acre in maize?
Emaan 5 (Emamectin Benzoate 5% SG) should be applied at 100 gm per acre, dissolved in 150-200 liters of water, and sprayed into the whorl.
What is Kala Amrit used for?
Kala Amrit is a premium humic acid product applied at 500 gm per acre, which strengthens roots and helps the plant recover quickly from pest damage.
Can Lambda Knight and Emaan 5 be mixed and sprayed together?
Yes, they can be mixed, but read both labels and perform a jar test in a small quantity before adding to the full tank.
