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Reason® is a broad-spectrum foliar fungicide that provides effective control of a variety of plant diseases with limited plant-back restrictions for greater in-field flexibility. As a locally systemic foliar fungicide, Reason stops disease development at many stages in the disease life cycle. The active ingredient provides a fast-acting, consistently high level of control. This activity, combined with a strong spore-killing effect, provides complete disease protection for use in bulb vegetables, carrots, cucurbits, fruiting vegetables, grapes, leafy and brassica vegetables, and potatoes.

Functions: Fungicide

Fungicide Target Species: Alternaria, Cercospora, Peronospora, Phytophthora, Pythium

FRAC Code: 11

Application Technique: Chemigation, Sprayers

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Knowde Enhanced TDS

Identification & Functionality

Chemical Family
FRAC Code
Agrochemical Functions
Technologies
Composition
  • ACTIVE INGREDIENT
  1. Fenamidone: (5S)-3,5-dihydro-5-methyl-2-(methylthio)-5-phenyl- 3-(phenylamino)-4H-imidazol-4-one: - 44.40%
  • OTHER INGREDIENTS - 55.60%
  • Total (Contains 4 .13 pounds active ingredient per U .S . gallon)- 100.00%

Features & Benefits

Agrochemicals Features
Product Highlights
  • Fast-acting – Reason® exhibits excellent activity on key stages within the pathogen life cycle sites of action. Acts rapidly against both the direct and indirect germination cycles of the disease, resulting in consistent and effective disease prevention.
  • Translaminar Movement – Penetrates and moves through the leaf tissue to protect the untreated side of the leaf. This movement prevents the progression of diseases, as well as pathogen sporulation on both sides of the leaf.
  • Strong Anti-sporulation Activity – Prevents sporulation, effectively stopping pathogens before they can spread to healthy leaf tissue and other plants within the field.
  • Curative and Protective Performance - Reason exhibits curative properties under certain conditions, which can be a relief during a tough season. Though Reason exhibits curative properties, Gowan recommends early application for best results. Reason is especially active on oomycete diseases. Studies have shown that once applied to leaf buds, it stays within the plant and protects the new and expanding leaves.
Key Diseases Controlled
  • Alternaria leaf spot
  • Black dot (suppression)
  • Downy mildew
  • Early blight
  • Late blight
  • Purple blotch
  • White rust

Applications & Uses

Application Technique
Directions For Use
  • It is a violation of Federal law to use this product in a manner inconsistent with its labeling. Read the entire label before using this product
  • Do not apply this product in a way that will contact workers or other persons, either directly or through drift. Only protected handlers may be in the area during application. For any requirements specific to your State or Tribe, consult the agency responsible for pesticide regulation .
  • In the State of New York only; not for sale, distribution or use in Nassau or Suffolk County

Properties

Physical Form

Safety & Health

Hazards To Humans And Domestic Animals
  • Causes moderate eye irritation.
  • Avoid contact with skin, eyes or clothing.
  • Wash thoroughly with soap and water after handling and before eating, drinking, chewing gum, or using tobacco .
  • Harmful if inhaled. Avoid breathing spray mist.
User Safety Requirements

When handlers use closed systems, enclosed cabs, or aircraft in a manner that meets the requirements listed in the Worker Protection Standard (WPS) for agricultural pesticides [40 CFR 170.240 (d) (4-6)], the handler PPE requirements may be reduced or modified as specified in the WPS.

Applicators and other handlers must wear:

  • Long-sleeved shirt and long pants
  • Shoes plus socks
  • Chemical resistant gloves made of any waterproof material, such as Nitrile, Butyl, Neoprene, and/or Barrier Laminate .

Follow manufacturer’s instructions for cleaning/maintaining PPE. If no such instructions for washables exist, use detergent and hot water. Keep and wash PPE separately from other laundry.

 

User Safety Recommendations
  • Users should wash hands before eating, drinking, chewing gum, using tobacco or using the toilet.
  • Users should remove clothing/PPE immediately if pesticide gets inside. Then wash thoroughly and put on clean clothing .
  • Users should remove PPE immediately after handling this product. Wash the outside of gloves before removing. As soon as possible, wash thoroughly and change into clean clothing
Environmental Hazards
  • This pesticide is toxic to fish, aquatic invertebrates, shrimp, and oysters. Do not apply directly to water, or to areas where surface water is present or to intertidal areas below the mean high water mark. Drift and runoff may be hazardous to aquatic organisms in water adjacent to treated areas. Do not contaminate water when disposing of equipment washwater or rinsate.
  • Surface Water Advisory: This product may contaminate water through drift of spray in wind. This product has a high potential for runoff for several months or more after application. Poorly draining soils and soils with shallow water tables are more prone to produce runoff that contains this product. A level, well maintained vegetative buffer strip between areas to which this product is applied and surface water features such as ponds, streams, and springs will reduce the potential for contamination of water from rainfall-runoff. Runoff of this product will be reduced by avoiding applications when rainfall is forecasted to occur within 48 hours.
  • Endangered Species Advisory/Protection Requirements:  If endangered aquatic invertebrate species occur in the proximity of the application site, the following mitigation measures are required to avoid adverse effects: Apply when the wind direction is away from permanent water bodies (lakes, ponds, rivers, streams, springs) that are adjacent to the treatment area. To determine whether your county has an endangered aquatic invertebrate species, consult http://www.epa.gov/espp/bulletins.htm. Endangered Species Bulletins may also be obtained from extension offices or state pesticide agencies . If the bulletin is not available from your specific area, check with the appropriate local state agency to determine if known populations of endangered aquatic invertebrates occur in the area to be treated.

Storage & Handling

Storage and Disposal
  • Pesticide storage: Do not contaminate water, food, or feed by storage or disposal
  • Pesticide disposal: Wastes resulting from the use of this product may be disposed of on site or at an approved waste disposal facility .
  • Container handling Dilutable Seed Treatment Products in Non-Refillable Containers Nonrefillable container. Do not reuse or refill this container. After emptying product from container, either return container to Bayer CropScience per instructions from Bayer CropScience Customer Service Center (1-800-527-4781), or rinse and either recycle or dispose of the container as follows:
  • Liquid dilutables in containers small enough to shake (5 gallons or less)Triple Rinse as follows: Empty the remaining contents into application equipment or a mix tank and drain for 10 seconds after the flow begins to drip. Fill the container 1/4 full with water and recap. Shake for 10 seconds. Pour rinsate into application equipment or a mix tank or store rinsate for later use or disposal. Drain for 10 seconds after the flow begins to drip. Repeat this procedure two more times.Once container is rinsed, offer for recycling if available or puncture and dispose of in a sanitary landfill, or by incineration.
  • Dilutable Seed Treatment Products in Non-Refillable Plastic Containers Rigid Non-refillable containers that are too large to shake (i.e., with capacities greater than 5 gallons or 50 lbs)Non-refillable container. Do not reuse or refill this container. After emptying product from container, either return container to Bayer CropScience per instructions from Bayer CropScience Customer Service Center (1-800-527-4781), or rinse and either recycle or dispose of the container as follows:
  • Bottom Discharge IBC (e.g. – Schuetz Caged IBC or Snyder Square Stackable) Pressure rinsing the container before final disposal is the responsibility of the person disposing of the container. To pressure rinse the container before final disposal, empty the remaining contents from the IBC into application equipment or mix tank. Raise the bottom of the IBC by 1.5 inches on the side which is opposite of the bottom discharge valve to promote more complete product removal. Completely remove the top lid of the IBC. Use water pressurized to at least 40 PSI to rinse all interior portions. Continuously pump or drain rinsate into application equipment or rinsate collection system while pressure rinsing. Continue pressure rinsing for 2 minutes or until rinsate becomes clear. Replace the lid and close bottom valve .Once container is rinsed, offer for recycling if available or puncture and dispose of in a sanitary landfill, or by incineration.