Criterion 75 WSP contains 75% Imidacloprid, a systemic insecticide for controlling insect pests on sod, lawns, landscape areas and ornamental trees and shrubs. In addition to protecting the health of turf and landscape ornamentals from within the plant, Criterion 75 WSP provides fast knock-down, broad-spectrum control, and long lasting grub and insect control with preventative and curative properties. Criterion 75 contains imidacloprid for consistent performance and flexible application timing.
There are 4 x 1.6 oz water soluble packets in each envelope.
Criterion 75 water soluble packet (WSP) is a liquid insecticide concentrate which can be used at very low rates and applied as a foliar spray, soil broadcast spray, soil injection or soil drench to control grubs, weevils, and other soil and turf inhabiting pests. Soil applications are taken up by plant, ornamental, and tree roots into twigs, stems, and foliage. Criterion 75 WSP includes detailed instructions for application to turfgrass, ornamentals, trees, shrubs, flowers, groundcovers, and in and around commercial or residential buildings. Most applications of Criterion 75 Systemic Insecticide require the use of a one or two gallon pressurized sprayer. There are 4 x 1.6 oz water soluable packets in each envelope.
The coverage area of 1 envelope of Criterion 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 gallons of water
For Systemic applications of Trees: 1.6 oz. (1 packet) per 24 - 48 cumulative inches Trunk Diameter
For Systemic applications of Shrubs: 1.6 oz. (1 packet) per 24 - 48 cumulative feet Shrub Height
Product worked in EXACTLY the same manner as the higher priced Merit 75 WSP. Took care of my ficus shrubs, that were infested with white fly. Two weeks after application, I'm already seeing new growth. Will continue to treat every six-months as recommended.
Can Criterion 75 WSP be used to control hemlock woolly adelgid?
If so, how much of the product would I need to treat an 18" hemlock?
Yes, you can use Criterion to treat a hemlock for the woolly adelgid. You should follow the soil drench instructions on the product label. You should apply 1 pouch or 1.6 oz of criterion for every 24 to 48 inches of trunk diameter. You should apply the pouch in at least 10 gallons of water to apply the drench. It really does not matter how much water you use, it just matters how much product you are applying over the area. The more water you apply it with the deeper the ground will soak it up. Slightly less than 1 pouch should be used for an 18" wide hemlock.
What product and when should I apply it to curtail emerald ash borer?
I am trying to keep the green ash borer from destroying a couple of my trees, one is already a goner, the two others look ok right now, should I wait till next spring or give them a dose of something now? My ash trees are roughly 12' in diameter. Any advice is welcomed.
Criterion WSP is the most popular choice for emerald ash borers. You need 1.4 level teaspoons per inch of diameter. This is the highest rate and should be used for all boring insects. The amount of water that is used will vary depending on soil conditions and volumes that are easy for applicators to use. The minimum amount of water that should be used is 1 pint per inch of tree diameter but you may use 1 quart -1 gallon of water per inch as well. Denser soils such as clay do not accept water as readily, so the lower volume of water is suggested. Since sandy soils can accept more water, using the higher volume of water is preferred. Treatments should begin in May or June and should be done every year to protect trees from the EAB.
Which provides longer residual control? A soil drench or foliar application?
I have 300 linear ft of a 4ft tall podocarpus hedge infested with aphids. Which method will provide the longest residual effect and what would be the amount needed for this hedge?
A soil drench will provide a longer residual as it will soak into the plants inner system and last for typically an entire growing season up to 1 year. Foliar application can be somewhat systemic as well but would need to be reapplied after the weather wears away at it on the surface. Per the product label: For Aphid treatment on Shrubs: Soil Drench: Uniformly apply the dosage in no less than 10 gallons of water per 1000 sq/ft as a drench around the base of the shrub, directed to the root zone. Use 1.6oz (1 packet) Criterion 75 WSP per 24-48 ft of cumulative shrub height. There is not a way to mix up less than what the packet states at a time so unless you have a large tank (at least 100 gallons or so) you would be far better off using a liquid Imidacloprid product rather than the extremely hard to use Criterion.
We would recommend Adonis 2F instead for the soil treament. To Apply: Most people use a 5 gallon bucket or a large watering can to apply Adonis as a soil drench. You will need 0.1 to 0.2 fl. oz. (3 to 6 mL) of Adonis 2F per foot of shrub height or 0.1 to 0.2 fl oz per inch of trunk diameter for trees. The amount of water that is used will vary depending on soil conditions and volumes that are easy for applicators to use. The minimum amount of water that should be used is 1 pint per foot of shrub height (or inch of trunk diameter for trees) but you may use 1 quart -1 gallon of water per foot of height (or inch of trunk diameter for trees) as well. Denser soils such as clay do not accept water as readily, so the lower volume of water is suggested. Since sandy soils can accept more water, using the higher volume of water is preferred. After the soil drench has been applied you should water it in with at east 1/2 inch of water. Note: 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. Insecticides applied to the soil are taken up by the roots and translocated throughout the tree or shrub. Root/soil drenches offer the advantage of requiring no special equipment to apply (other than a bucket or watering can). However, surface layers of organic matter, such as mulch or leaf litter, can bind the insecticide and reduce uptake. Before applying drenches, it is important to remove or pull back any mulch or dead leaves so the insecticide solution is poured directly on the mineral soil. It is also important to keep the soil around the tree or shrub moist for the next 7-10 days after applications to encourage uptake.
Can I use Mallet 75 WSP for aphid control on trees near the street?
Can this product be used to make soil injections of the systemic insecticide to control tree aphids that secrete the sticky honey-dew substance? If so how do we apply to the tree? Is it safe for pets or kids roaming near a street tree? Do you recommend any alternative products? Thanks!
Mallet 75 WSP is no longer available as it has been discontinued by the manufacturer. We recommend Criterion 75 WSP which has the same active ingredient at the same concentration and pretty much the same label. You can apply Criterion as a soil drench to control aphids but it will take time to see the results as the tree has to trans-locate the product throughout the foliage which can take some time. Immediately before or just after the soil drench you can simply use a strong stream of water from a garden hose to dislodge the aphids from the tree. Using Criterion on this tree will be safe for the children and pets as long as they are out of the area while the soil drench is being applied.