Growth Products, Ltd: Horticulture

Sponsoring Multiple Studies for
Disease and Insect Control

Growth Products research is taking a unique approach using biorationals to help growers win their battle against fungal, bacterial diseases and insect infestation while preventing resistance problems. The four research trials focused on improving strawberry crops yield, fighting diseases such as Botrytis, Phytophthora and Anthracnose and warding off insect attachment by physically changing the plants physiology; protecting it from insect feeding.

The following studies evaluated the performance of Companion Biological Fungicide, TKO Phosphite 0-29-26 to control disease and increase yield and SiTKO 0-7-17 a propriety formula containing phosphite and potassium silica for warding off spider mites.

Companion Biological Fungicide contains the unique strain of Bacillus subtilis (GB03) that works in three different ways to fight disease-causing pathogens. It disrupts the pathogen cell membrane by the release of an antibiotic, Iturin. It forms a protective zone around the roots and elicits Induced Systemic Resistance (ISR) boosting the plants immune system to fight disease, restricting the development of diseases. These mutiple modes of action reduce the potential to develop pathogen resistance. In all studies crop yield was increased.

Trials with Companion, alternating with chemical pesticides, realized improved efficacy of the pesticide while reducing the pesticide applications by 50%. Additionally, there is a zero-day pre-harvest interval to control late season diseases. Companion is compatible and can be tank-mixed for one-time application with registered pesticides.


Twospotted Spider Mites

“The application of silicates are known to change the plant’s morphology” *

SiTKO 0-7-17 contains both 100% solublepotassium silicate and phosphite. Twospotted Spider Mites are the most common pest of strawberries, effecting the overall health of developing strawberry plants, reducing marketable yield. Under FQPA more chemicals are being removed for use on food crops. SiTKO provides an alternative biorational approach for the control of Twospotted Spider Mite Control.

Silicate-based products are known to protect and improve the plant’s tolerance to insect feeding. A spring 2016 trial shows impressive Twospotted Spider Mite control by SiTKO 0-7-17. When compared to the Untreated check, applications of SiTKO, showed marked suppression number of spiders mite on the plants (Chart 1) by 65.9% over the control and 20.5% better than the insecticidal soap.

*UDSA National Organic Program ORGANIC PROGRAM, Technical Evaluation Report, “Aqueous Potassium Silicate - Crops”, Jan. 6, 2014
**A Guide for Biological Control of Twospotted Spider Mites In Strawberry Production, Clemson Cooperative Ext, Roger Frances)
“Uncontrolled outbreaks of twospotted spider mites can reduce strawberry yield by more than 50%” **

Control of Twospotted Spider Mites on Strawberry
strawberry study
Chart 1
Twospotted Spider Mite Strawberry Trial, 2016
Application March - May, 7 sprays per product, Delivery 50 gal per acre.
Biological Applied Research, Elm City, NC


Phytophthora Crown Rot

Phytophthora cactorum

Significant Increase in Yield from TKO

A Trial was conducted from October 2015 to February 2016 on Fragaria x ananassa ‘Florida 127’ to evaluate the efficacy of various products on yield and disease control. The replicas were inoculated with Phytophthora cactorum and treated to control disease progression. The results were outstanding for both yield and disease control with applications of TKO Phosphite 0-29-26 realizing an increase in yield of 97.6% over conventional Ranman and 10% increase in yield over Ridomil.

TKO Phosphite topped the charts, outperforming all other products in the trial with 6,248 lbs per acre (Chart 2) of marketable fruit! Five applications were done at 2 qt. per acre every 2 weeks at a rate of 100 gal. per acre from Oct to Dec..

Strengthen Resistance & Disease Reduction

The trial focused on the control of phytophthora disease. Disease control was maintained with the application of TKO Phosphite throughout the trial and was statistically the same as the application of Ridomil Gold SL. (Chart 3).

One-Two “Punch” with TKO

Highly soluble P & K provides disease control and improved yield all-in-one, that’s the Power of TKO Phosphite 0-29-26!

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Marketable Fruit Yield
Pounds per Acre Harvested
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Chart 2
Phytophthora Strawberry Trial, 2015-2016
Rate 2 quarts per acre every 2 weeks.
University of Florida, Gulf Coast Research and Education Center, Wimauma, FL


Phytophthora Incidence on Strawberry
% of diseased plants
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Chart 3
Phytophthora Strawberry Trial 2015-2016
Rate 2 quarts per acre every 2 weeks.
University of Florida, Gulf Coast Research and Education Center, Wimauma, FL



Anthracnose Fruit Rot

Phytophthora cactorum

Control of Anthracnose Fruit Rot
Average Fruit Weight in Grams
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Chart 4
Anthracnose Strawberry Trial, 2014-2015
4 treatments weekly.
Biological Applied Research, Inc. Raleigh, NC


Control of Anthracnose Fruit Rot
Total Marketable Fruit Count
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Chart 5
Anthracnose Strawberry Trial, 2014-2015
4 treatments weekly.
Biological Applied Research, Inc. Raleigh, NC

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Optimize Crop Output

Biological or naturally derived materials used in agronomic applications saves money and reduces chemical fungicide dependence. A concentrated study on the efficacy of Companion in comparison to combination fungicide applications, against strawberry plants inoculated with Anthracnose Fruit Rot, completed in 2015 on randomized completed block of Fragaria x ananassa cultivar ‘Chandler’ demonstrates the efficacy of biologicals for disease control and yield protection. Four fungicide / biological fungicide treatments were made weekly from 12-May to 2-June with weekly harvests.

Protect your Plants, Help your Harvest

Companion Biological Fungicide came out on top with 9.5% more average yield than a combination application of four fungicides (Captan 50 WP, Topsin-M70W, Pristine 38 WG and Switch 62.5 WG) and 93.8% more yield than the untreated check (Chart 4).

By the Numbers

Again Companion Biological Fungicide leads with total fruit count. Applications of Companion, yielded the highest Fruit Counts in the trial, with 13.3% - 24.6% more fruit than Untreated Check and 8.9% - 19.9% when compared to the combination application of fungicides (Chart 5).



Botrytis Fruit Rot

Botrytis cinerea

Botrytis Fruit Rot
% of Yield
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Chart 6
Botrytis Strawberry Trial 2016 -
7 sprays at a spray rate of 50 gal per acre.
Biological Applied Research, Inc. Raleigh, NC


Botrytis Fruit Rot at Harvest
% by Weight
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Chart 7
Botrytis Strawberry Trial 2016
March - May, 7 sprays at a spray rate of 50 gal per acre
Biological Applied Research, Inc. Raleigh, NC

Shield your Yield from Botrytis Fruit Rot (BFR)

Botrytis is a widespread disease in strawberries. It can infect the plants both during the growing season and in dormancy, often appearing as soon as conditions are favorable. It can have a heavy impact on yield. Preemptive treatment is important and throughout the growing season.

SiTKO 0-7-17 Saves you Dollars and Makes “Sense”!

SiTKO, a proprietary product containing potassium silicate and potassium phosphite, materials considered to be biocompatible chemical compounds, enhance plant disease resistance through Induced Systemic Resistance (ISR). They are also termed “plant inductors” and are effective against many kinds of biotic and abiotic stress; an innovative strategy to improve the yield and quality of crops. SiTKO 0-7-17 performed very well in protecting yield from Botrytis in a 2016 study. Even at lower rates, SiTKO decreased the percentage of disease (Chart 6) and the percentage of diseased harvest weight fruit (Chart 7) as compared to M-Pede. Greater efficacy and the ability to use less product will not only be good for your bottom line, but also the environment.


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Companion Biological Fungicide, SiTKO 0-7-17, & TKO Phosphite 0-29-26 are registered trademarks of Growth Products, Ltd. Serenade is a registered trademark of Bayer CropScience. MilStop is a registered trademark of BioWorks Inc. Switch 62.5 WG, Ridomil Gold SL, and Revus are registered trademarks of Syngenta. Captan 80 WG is a registered trademark of Drexel Chemical Company. M-Pede is a registered trademark of Gowan Company LLC. K-Phite is a registered trademark of Plant Food Systems, Inc. Taegro 13 WP is a registered trademark of Novozymes. Ranman is a registered trademark of Ishihara Sangyo Kaisha, Ltd. Pristine 38 WG is a registered trademark of BASF SE