Merit 75 WSP will treat grubs and other turf pests that moles may occasionally eat, however, we would not recommend insect control as the primary means of treating for moles. Moles' primary food source is earthworms, which are going to be impossible (and unecessary) to eliminate. Our most popular treatment product for moles is Talpirid Mole Bait. Please see our Mole Treatment Guide for more details and tips.
The amount of water used with Merit 75 WSP is up to you. The manufacturer recommends that you use an amount of water that is easy for you to handle and calculate. Water simply acts as a carrier and it is important that even distribution of the product is achieved. Thus, more water may be used if the applicator feels runoff will not occur and proper penetration of the root zone is achieved. It is recommended that you use at least 5-10 gallons of water per 1,000 sq ft. After the application is complete you can then go back and irrigate the area to help the product penetrate the root systems. Please see the Label for complete application instructions. Keep in mind that each water-soluble packet of Merit 75 WSP treats 12-24 cumulative inches of trunk diameter when treating for trees, and each packet is usually diluted in at least 25 gallons of water, so this may not be the right formulation for you if you are only treating a small area. You may consider Dominion 2L for smaller applications.
The coverage area of 1 envelope of Merit 75 WSP will depend entirely on the type of pest you are treating and the area that is being treated. Here are some general guidelines:
There are 4 x 1.6 oz water soluble packets in each envelope.
For Turf grass-: 1.6 oz (1 packet) per 8,250 sq ft to 11,000 sq ft.
For Foliar applications of trees, shrubs: 1.6 oz (1 packet) per 300 gal water
For Systemic applications of trees: 1.6 (1 packet) per 24-48 cumulative inches trunk diameter
For Systemic applications of shrubs: 1.6 (1 packet) per 24-48 cumulative feet shrub height
Merit WSP label:
Easy to understand mixing instructions at bottom of page:
Since Merit 75 WP does not list bamboo specifically on the label, we cannot give an exact rate for this plant, unfortunately. Our best recommendation would be using the ornamental plants rate, which is 1 x 1.6 oz packet per 300 gallons of water applied as a foliar spray. Since this is a systemic product, it is typically only used once or twice a year.
With Merit, it is most effective when applied prior to, or just after, egg lay. In most cases, adult emergence occurs in early summer, often after significant rainfall or irrigation, followed by mating and egg laying. This usually continues for four to six weeks. Under normal circumstances, Merit will provide residual white grub control for four months or longer in turf.
Dylox 6.2 Granules is only active and kills for 48 hours. Dylox should be watered in for at least 1 to 1.5 hours for best results to ensure the product makes it through the thatch layer to where the grubs are feeding. Mature grubs usually require at least 2 applications, 3 to 4 days apart.