Chemical Class and SDHI Mode of Action
Penflufen belongs to the pyrazole-4-carboxamide chemical class and functions as a Succinate Dehydrogenase Inhibitor (SDHI - FRAC Group 7). It targets mitochondrial Complex II, binding to the quinone reduction site within the fungal respiratory chain.
By shutting down cellular respiration in fungal mitochondria, Penflufen arrests mycelial growth and stops sclerotial germination before Rhizoctonia solani hyphae can invade emerging sprout eyes or rootlets.
- Targeted Complex II Inhibition: Completely inhibits succinate dehydrogenase, stopping fungal cellular ATP synthesis.
- Flowable Concentrate for Seed Treatment (FS): Specially formulated to adhere tightly to potato tuber cuticles without flaking off.
- Low Dose Efficacy: Delivers prolonged protection at micro-doses compared to legacy carbamate or contact seed dressings.
Target Disease: Black Scurf in Potatoes
Black scurf and stem canker caused by Rhizoctonia solani is one of the most economically damaging diseases affecting potato seed producers and commercial growers. Seed-borne black sclerotia look like soil specks that fail to wash off, causing sunken eyes, stolon girdling, and misshapen tubers.
Treating seed tubers with Emesto Prime creates a protective chemical shield around the tuber skin, ensuring uniform sprout emergence, vigorous stolon development, and smooth, clean skin finish at harvest.
- Sclerotial Eradication: Suppresses seed-borne sclerotial germination on the tuber surface.
- Stem Canker Prevention: Prevents fungal lesions from girdling tender subterranean sprouts and stolons.
- Tuber Finish Improvement: Produces uniform, blemish-free tubers commanding higher prices in table and chip processing markets.
Application Guidelines and Seed Treatment Protocol
Apply Emesto Prime to seed potato tubers before cold storage or at planting time using specialized automated seed dressing rollers or clean knapsack sprayers fitted with fine flat fan nozzles over moving tuber grading tables.
Ensure tubers are uniformly dried in shade after treatment before bagging or planting. Do not expose freshly treated seed potatoes to direct harsh sunlight or sub-zero freezing temperatures.
- Uniform Coverage: Even coating over tuber eyes without oversaturating or soaking seed cuticles.
- Planting Timing: Allow tubers to dry completely before mechanical planter loading.
- Safety Protocols: Wear protective chemical-resistant gloves, aprons, and masks during seed dressing operations.
Official source
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Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What is the active technical ingredient in Emesto Prime?
Emesto Prime contains Penflufen 240 FS (Flowable Concentrate for Seed Treatment), an SDHI-class systemic fungicide.
Which major disease does Emesto Prime control in potatoes?
It specifically manages black scurf and stem canker caused by Rhizoctonia solani in potato crops.
When should potato seed tubers be treated with Emesto Prime?
Seed tubers can be treated either before loading into cold storage or prior to planting in the field after sprout emergence has begun.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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