Advanced Micro Polymers Inc.

Natural Polymers to help preserve our environment
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Liquid Mulch Test Results

Weed Suppresion Compared to Cedar Bark Chips in Landscaping
Results Reported on Monday August 9th, 2010

A direct comparison of the amount of AMP153 (Landscape grade) Liquid Mulch, Red Colour to the amount of cedar bark mulch in order to obtain similar weed suppression was made. In both cases, no textile barrier was used.

The Liquid Mulch was prepared by diluting it with water in a ratio of 1 part (by volume) Liquid Mulch and 1.5 parts (by volume) tap water. This was done by adding 25 Liters of tap water to the tank of the demo application unit (Please contact us to obtain details about the application unit). The pump was turned on and the water was recirculated. While the water was recirculating, 17 Liters of Liquid Mulch was added to the tank.

Both the cedar bark mulch and the Liquid Mulch were applied unto a weed free garden bed composed of a mixture of 1/3 top soil, 1/3 peat moss and 1/3 compost. The primary plants in the beds were hostas and each bed was about 2 square meters (22 square feet). All beds were side by side with equal weed pressure.

To the first test plot, cedar bark mulch was added until it was 5 cm deep. To the second plot, immediatly adjacent to the first, 4.5 Liters of diluted Liquid Mulch (or 3 Liters of concentrated Liquid Mulch) was evenly applied.
To the third test plot, cedar bark mulch was added until it was 10 cm deep. To the fourth plot, immediatly adjacent to the third, 6 Liters of diluted Liquid Mulch (or 4 Liters of concentrated Liquid Mulch) was evenly applied.
To the fifth test plot, cedar bark mulch was added until it was 15 cm deep. To the sixth plot, immediatly adjacent to the fifth, 7.5 Liters of diluted Liquid Mulch (or 5 Liters of concnetrated Liquid Mulch) was evenly applied.

The cedar bark and the Liquid Mulch were applied on May 17th, 2010. The plots were watered and fertilized as required but no weeding was done. All six plots were treated the same. At the end of July a survey was made of the condition of the Liquid Mulch and of the number of weeds in each plot.

The effectiveness of Liquid Mulch was as follows:

Red Cedar Mulch Bed Depth
Liquid Mulch AMP153 Addition Rate
# of Weeds in Test Plot
5 cm (2 inches)
1.5 Kg per square meter (0.3 lbs per square foot)
8 to 12 
10 cm (4 inches)
2 Kg per square meter (0.4 lbs per square foot)
4 to 7
15 cm (6 inches)
2.5 Kg per square meter (0.5 lbs per square foot)
0 to 3 

Therefore, a cedar mulch bed depth of 15 cm (6 inches) is approximately equivalent to a Liquid Mulch application rate of 2.5 Kg per square meter.

Visit our Liquid Mulch Application section for more application information or contact us.

 
Weed Suppresion Compared to Geo Textile & Coco Disks in 3 Gallon Pots
Results Reported on Wednesday August 19th, 2009

A direct comparison of the amount of weed suppression obtained by using AMP753 (Nursery grade) Liquid Mulch, Natural Colour; dry wood chips; geo-textile fabric (precut for the pots) and coco disks was made. Walnut saplings were pre-planted in the pots.

The Liquid Mulch was prepared by diluting it with water in a ratio of 1 part (by volume) Liquid Mulch and 2 parts (by volume) tap water. This was done by adding 4 Liters of tap water to a pail (Please contact us to obtain more information about diluting Liquid Mulch) and then adding 2 Liters of Liquid Mulch. The product was thoroughly mixed using a stick.

The pots were weeded by hand. All pots were side by side with equal weed pressure.

The first ten pot were left untreated. This was the control.
Liquid Mulch was applied to the next ten pots by using a watering can (without spout). The Liquid Mulch was poured into the pot until the liquid was about 1 cm deep. This equalled an application rate of about 1.5 Kg per sq. m.
Geo-textile disks were placed onto another ten pots and new coco disks were placed onto the final ten pots.

The pots were prepared in the beginning of June. The pots were watered and fertilized as required but no weeding was done. All the pots were treated the same and were kept outside at the tree nursery. At the end of August a survey was made of the condition of the Liquid Mulch and of the number of weeds in each pot.

The effectiveness of Liquid Mulch was as follows:

Weed Control Method
Average # of Weeds per Pot
Control - No weed control
7
Liquid Mulch - AMP753 @ 1.5 Kg/m2
0.5
Coco Disks
1.5
 Geo-Textile Disks
2
Dry Wood Chip Mulch
3.5

Weeds grew mainly between the disks and the sides of the pots. Since the Liquid Mulch flowed and there was no gap between the mulch and pot, fewer weeds grew.

Visit our Liquid Mulch Application section for more application information or contact us.


Insect Mortality By Amount of Liquid Mulch Applied
Results Reported in September, 2012

A direct comparison of the number of Thrips insects that died because their life cycle was interrupted by Liquid Mulch. The number of Thrips that died was compared to the thickness of the Liquid Mulch film in the pot.

The Liquid Mulch was prepared by diluting it with water in a ratio of 1 part (by volume) Liquid Mulch and 2 parts (by volume) tap water. The food stock for the Thrips insects was crysanthemum leaves.

Please Contact Us for more detail on the test protocol.
 
The effectiveness of Liquid Mulch was as follows:

Liquid Mulch Application Rate (Kg/m2)
% Thrips Mortality Rate
0 - No Liquid Mulch was applied - Control
10
1
15
1.5
40
 2
50

The most effective application rate to block Thrips insects from completing their life cycle in the soil is about 2 Kg/m2

Visit our Liquid Mulch Application section for more application information or contact us.