Mycostop/K61 FAQ



Frequently Asked Questions 

Preguntas Frecuentes Sobre Mycostop/K61



Are Mycostop WP and LALSTOP K61 WP the same? What is the difference?

¿Mycostop WP y LALSTOP K61 WP son iguales? ¿Cuál es la diferencia?

They are the same product and formulation, both manufactured by Lallemand.  LALSTOP K61 is available in larger 100 & 1000 gram packets, Mycostop WP can be purchased in 2, 5 and 25 gram packets.

Son el mismo producto y formulación, ambos fabricados por Lallemand. LALSTOP K61 está disponible en paquetes más grandes de 100 y 1000 gramos, Mycostop WP se puede comprar en paquetes de 2, 5 y 25 gramos.


How do you mix Mycostop/K61 Wettable Powder (WP)? 

¿Cómo se mezcla Mycostop / K61 polvo húmedo (WP)?

Add the required amount of Mycostop/K61 WP into small a small volume of water (1 Quart or 1 Liter~) and agitate for 3-5 minutes. No clumps should be present when mixed.

Agregue la cantidad requerida de Mycostop/K61 WP en un pequeño volumen de agua (1 Litro~) y agitar durante 3-5minutos. No hay grupos deben estar presentes cuando se mezclan.


Can you mix Mycostop/K61 WP without using a scale?

Yes - 1/6 level teaspoon is approximately equal to 0.5 grams of Mycostop/K61 WP, which makes 5 gallons of ready-to-apply solution at full strength for soil drench use.


 Can you mix Mycostop/K61 WP and use the solution at a later time?

Once mixed the solution should be used within 4 hours.  The Streptomyces spores will start to germinate and need a root surface or rhizosphere to colonize as soon as possible for best results.

Do you have to use the entire packet at once? 

No, a single packet may be used for for several applications - the package can be stored in the refrigerator or freezer after opening.  For best results, fold the foil packet over itself at the top, then place packet in a ziploc bag.  This will ensure no light, heat, or moisture will be present to degrade proteins that compose Mycostop/K61.

Is Mycostop/K61 WP safe for my pets that may come in contact with it, specifically cats in my garden? 

Mycostop/K61 is 100% organic and natural. Animals have shown no interest in the powder.  It has an earthy odor.  Even if consumed by a cat or dog, no harm is expected based on extensive lab testing for EPA registration.

Is Mycostop/K61 WP OMRI Listed? 

Yes - Mycostop/K61 WP has been OMRI listed since 1988 (current certificates can be viewed on individual product pages)

Is Mycostop/K61 WP registered for use in California? 

Yes - Mycostop/LALSTOP K61 WP is currently registered for Ornamental Applications & Greenhouse Crops in California, CALPIP #64137-5-AA.

How often should I re-apply Mycostop/K61?

Every 3-4 weeks for most applications, more often if the plants continue to show signs of disease.  Reapplication intervals shorter than 14 days have proven ineffective in most cases.

 Is there a re-entry interval when applying Mycostop/K61?

No, Mycostop/K61 can be applied freely at any time with no concern for re-entry.

Do fertilizer applications affect Mycostop/K61? 

Organic or inorganic fertilizers with not harm Mycostop/K61 as applied to the plant.  Mycostop/K61 should not be added to concentrated inorganic fertilizer such as in a feed tank because of the high ppm salt concentration, which may have a detrimental effect on the Streptomyces spores. 

How much bleach or hydrogen peroxide will Mycostop/K61 tolerate in a hydroponic system?

Mycostop/K61 will be unaffected at rates lower than 25ppm, we recommend adding Mycostop to pure RO or low ppm feed water.