General Information


Contact your Extension Pomologist, Farm Advisor, Horticultural Specialist or Micro Flo Company Representative for local recommendations on product spray volume, spray equipment and rates of application for varying weather conditions.


For optimum product efficacy, thorough spray coverage is necessary. This can be influenced by type of spray equipment, spray boom setup, nozzle selection, plant size, canopy density and spray pressure. Depending on these choices, the necessary spray volume will vary. For applications by air in California and Arizona, more than 5 gallons per acre must be used.


THE MIXTURE OF THIS PRODUCT WITH AMMONIUM THIOSULFATE IS PROHIBITED AS IT MAY CREATE TOXIC FUMES. Other than recommended on the label, this product must not be used with additives. Upon mixture, this product must be applied as soon as possible; in no case should the spray solution be stored overnight.

Detrimental changes to plant growth, reduced yields, and plant injury may result from spray drift of this product to nearby crops and thus must be avoided. Do not plant another crop within 30 days after treatment.

This product is corrosive. Therefore, spills of concentrated product on the aircraft or other spray equipment must be avoided. Should such contact be made, immediately rinse with water.

Limitations, Restrictions, and Exceptions


A foliar spray of Flash will accelerate opening of mature unopened cotton bolls and enhance defoliation which can result in earlier harvest with an increased recoverable yield. Flash treatment allows increased efficiency from a once-over harvest.


Add 1/2 to 3/4 of the required amount of water to the spray tank. Start agitation. Add the required amount of Flash, and the remaining amount of water. Prepare only as much spray solution as can be used on the day of mixing. Do not allow spray solution to stand overnight. Do not spill the concentrated product on spray equipment, or any airplane parts.


Use of a nurse tank is highly recommended for avoiding possible spills of concentrated formulation on spray equipment or any airplane parts.


Thorough and uniform coverage of cotton leaves and bolls is required for optimum regrowth inhibition and boll opening. Apply as a dilute spray in 10 to 25 gallons of water per acre by ground or 3 to 5 gallons of water per acre by air.

Good agitation in the spray tank is essential and a tank-mixture should not be allowed to stand without agitation for more than 5 to 10 minutes. Read and observe all appropriate label use directions and precautions for the defoliants and insecticides used.

One gallon Flash treats 1.0-1.66 acres or 1.20-1.25 lbs a.i. per acre.

See test of boll maturity. Treatment uniformly opens bolls 7 to 14 days earlier.

Pretreatment With Defoliants Prior to Flash Treatment

If the cotton is overly rank or laying down in the middles and good spray coverage of the bolls with Flash is difficult, a pretreatment with defoliants will be useful to improve boll coverage with Flash. Use dosage rates of Flash recommended for boll opening. Read and observe all appropriate label use directions and precautions for the defoliant used.

NOTE: For California and Arizona use a volume of no less than 5 gallons per acre for aerial applications.

Boll Maturity

A boll is mature when it is too hard to be dented when squeezed between thumb and fingers, too hard to be sliced with a sharp knife, and when the seed coat becomes light brown in color.

Use Limitations

- Boll Opening: Do not tank-mix Flash with a desiccant if the cotton is to be spindle harvested.

- Pre-Condition for Defoliation: Do not tank-mix Flash with desiccants unless plant desiccation is required. Do not use a defoliant before there are sufficient mature unopened bolls to produce the desired yield (see General Information section on how to test for boll maturity).

When to Harvest

Do not harvest cotton sooner than 7 days after a treatment with Flash. Observe the treated crop and harvest when optimum boll opening has been reached. Too early harvest might reduce the full advantage of the treatment and too late a harvest may result in reduced quality and loss of lint, which will drop from the plant.

Restricted Entry Interval

48 hours

Exception: The REI is 72 hours in areas where average rainfall is less than 25 inches per year.