The mixing ratio is 0.1 to 0.4 fl. oz. of Mallet 2F T&O Insecticide per inch of trunk diameter. For the 40" diameter tree, you will use 4-16 fl. oz. per 10-15 gallons of water.
Prevention is the key in ensuring your trees will not succumb to the emerald ash borer. Please contact your local extension office to check if you are in the risk zone for this pest. Depending on what region you're in will determine the best time of year to treat for Emerald Ash Borer. Adult EAB feed on ash foliage throughout their life span and females must feed on leaves for at least 14 days before they begin laying eggs. This provides a window of opportunity to control the adults before any new eggs or larvae are produced. The onset of adult beetle emergence begins from early May (southern Ohio) to early June (central Michigan) and peaks two to three weeks later. Beetle emergence may begin sooner at locales farther south or later in more northern areas.
Soil drench treatments and soil injections around the base of the tree is the preferred method of treatment. Spraying the truck itself will not reach the insects underneath the bark. Using Merit 2F as a soil drench by mixing 0.1 to 0.2fl oz (3 to 6ml) per inch of trunk diameter.
Soil Drench: Uniformally apply the dosage in no less than 10 gallons of water per 1000 square feet as a drench around the base of the tree, directed to the root zone. Remove plastic or any other barrier that will prevent the solution from reaching the root zone. Please refer to page 6 of the Merit 2F label for specific instructions.
Two years of treatment in a row will need to be applied before this treatment can take its full effect. Soil injections and trunk injections are also viable options, but trunk injections risk damage to the tree if not done properly. Products containing bifenthrin, permethrin, or imidacloprid are good options and are found in many available insecticides.
Please take a look at our Emerald Ash Borer Treatment Page for product recommendations and treatment procedures.
According to the manufacturer, the amount of water is dependent upon the type of equipment being used for soil injection, how much psi is being used to inject the mixed solution, and how saturated or unsaturated the soil is. If the soil is dry, it is recommended to wet the area to be treated prior to application to prevent clumping. As a guide, using the soil drench application instructions per the product label is a good start: Using a minimum of 10 gallons of water to apply Mallet 2F T&O Insecticide to the root zone and keep moist for 7 days following application. Please contact Nufarm directly for more specific application instructions at 800-345-3330.
Mallet 2F T&O Insecticide is an insectide that can be applied via foliar application, soil injection or soil drench methods. The active ingredient Imidacloprid is a common and succcessful insectide when used to treat from the root up in bushes, trees, shrubs and ornamentals.
The "T & O" in Mallet 2F T&O Insecticide stands for Turf & Ornamantal.
Areas that have been treated with Mallet 2F T&O Insecticide are safe for pets/chickens as long as you keep them out of the area you plan to treat while spraying and until all surfaces have dried completely.
There should not be any issues mixing an insecticide like Mallet 2F with a fungicide such as Daconil as long as you are using the correct rates for each product and following the more restrictive label when mixing products. We recommend doing a small jar test for compatability before mixing a large tank.
Mallet 2F T&O Insecticide is nor labeled for pine beetles. If you wish to spray the trunks of trees for pine beetles we would suggest a product like Permethrin SFR. According to the Permethrin SFR product label, you should 32 oz per 100 gallons of water and if you break that down to the smaller amount you need you will use 1.6 fl oz per 5 gallons of water for pine beetle control. The tree should be sprayed from the ground to 15 ft up the trunk to prevent future infestations.
Unfortunately, there is no easy solution when it comes to pine beetles. Infected trees should be cut down (before the newly hatched beetles fly out of the trees in the spring/summer) and the wood burned or chipped, while other still healthy trees should be sprayed annually to protect them. Because of the natural boring behavior of the beetle, they are protected from topically applied insecticides and systemic insecticides (those injected into the tree or applied as a root drench) have proven ineffective for pine beetle infestations.