KEMSTAR by SUMITOMO (Penoxsulam 21.7% SC)
Herbicide · Detailed usage and dosage information for different crops
KEMSTAR dosage by crop
Pre-harvest interval (PHI): 60 days depending on crop. Do not harvest before the waiting period is complete.
| Crop | Pest / disease | Method | a.i. per ha | Formulation per ha | Water (L/ha) | Waiting period (days) |
|---|---|---|---|---|---|---|
| Paddy | Ammania Baccifera · Weeds | Spray | 22.5 to 25 (pre-emergence 0-5 DAT) | 93.7 to 104.2 | - | 60 |
| Paddy | Cyperus Compestris Difformis · Weeds | Spray | 22.5 to 25 (pre-emergence 0-5 DAT) | 93.7 to 104.2 | - | 60 |
| Paddy | Cyperus Compestris Iria · Weeds | Spray | 22.5 to 25 (pre-emergence 0-5 DAT) | 93.7 to 104.2 | - | 60 |
| Paddy | Echinochloa Colonum · Weeds | Spray | 22.5 to 25 (pre-emergence 0-5 DAT) | 93.7 to 104.2 | - | 60 |
| Paddy | Echinochloa Colonum · Weeds | Spray | 22.5 to 25 (pre-emergence 0-5 DAT) | 93.7 to 104.2 | - | 60 |
| Paddy | Fimbristylis Spp · Weeds | Spray | 20 to 22.5 (post-emergence 10-12 DAT) | 83.3 to 93.7 | - | - |
| Paddy | Ludwigia Spp · Weeds | Spray | 20 to 22.5 (post-emergence 10-12 DAT) | 83.3 to 93.7 | - | - |
| Paddy | Monochoria Spp · Weeds | Spray | 20 to 22.5 (post-emergence 10-12 DAT) | 83.3 to 93.7 | - | - |
| Paddy | Sphenoclea Zeylanica · Weeds | Spray | 20 to 22.5 (post-emergence 10-12 DAT) | 83.3 to 93.7 | - | - |
Read the label. Doses above are the registered label claims (Central Insecticides Board & Registration Committee) for information only. Always follow the product label and your local agriculture officer's advice, wear protective equipment, and observe the waiting period before harvest. Found an error? Report it. See our terms of use.
Product Label & Registration
KEMSTAR by SUMITOMO is registered under India's Insecticides Act 1968. The product label specifies the exact active ingredient concentration (Penoxsulam 21.7% SC), approved crops, application method, safety precautions, and the pre-harvest waiting period.
Always purchase from a licensed dealer and verify the registration on the official CIB&RC database before use.
Other Penoxsulam 21.7% SC brand products in India
All products below contain Penoxsulam 21.7% SC as the active ingredient and carry CIB&RC registered label claims.
- ★ This product
KEMSTARSUMITOMO 
DutonRALLIS
PenoxaCRYSTAL
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Source: Central Insecticides Board & Registration Committee (CIB&RC), India - official registered label data · View source →. Updated: updated annually or when label claims change · Report an error
Frequently Asked Questions
What crops is KEMSTAR registered for?
KEMSTAR (Penoxsulam 21.7% SC) is registered for use in Paddy as per CIB&RC label claims.
What is the dosage of KEMSTAR?
Dosage of KEMSTAR varies by crop and pest. Always follow the CIB&RC registered label dose for each crop.
Is KEMSTAR safe to use near water bodies?
Always follow the KEMSTAR label instructions regarding buffer zones near water bodies, drainage channels, or ponds. Do not spray during windy conditions or when rain is forecast within 4 hours. Dispose of empty containers as directed on the label — never near water sources.
Where can I buy KEMSTAR by SUMITOMO in India?
KEMSTAR is available from licensed pesticide dealers across India. Use the NaPanta app to find verified dealers near you who stock SUMITOMO products. Always purchase pesticides from licensed dealers and insist on a bill to ensure authenticity.
What precautions should I take when using KEMSTAR?
Wear personal protective equipment (PPE) — gloves, mask, eye protection, and full-sleeved clothing — when mixing and applying KEMSTAR. Do not eat, drink, or smoke during application. Wash thoroughly after use. Keep children and animals away from the treated area until the spray dries. Observe the pre-harvest waiting period listed on the label.