Garden Insect Killer. The next opportunity to spray for them is in late May through early July using a biological control called Bacillus thuringiensis (Bt). Once the eggs hatch in early June, large bagworm populations can completely defoliate and kill evergreens during summer. The bagworm is a caterpillar that builds a bag out of plant material. Bagworm infestation on a pine tree. Damage. Kill mosquitoes, aphids, whiteflies, mealybugs, red spider mites and scales with Ortho® MAX® Malathion Insect Spray Concentrate. The Bagworm moth is in the family Lepidoptera, genus Psychidae, and is named for the case that the caterpillar (larval) stage hide in. They destroy the foliage, which is particularly harmful to evergreens since this often results in branch death. Shrubs and trees that become heavily infested, particularly conifers, may be killed. Bagworm damage. The common bagworm, Thyridopteryx ephemeraeformis (Haworth), is an interesting caterpillar. This species has one generation per year. 1/4 - 1/2 Tsp. Bagworms are Caterpillars, the larvae of the Bagworm Moth. Make sure it has a pointy end to puncture the bagworm bags and it is long enough to reach them. In fact, it is too late to spray for bagworms this season. Therefore, if you can spray early, you can use Btk and do a pretty good job of killing a lot of them. A heavy infestation of bagworms can defoliate a shrub and seriously damage a tree. Light infestations slow the growth of evergreens and lower their windbreak value and aesthetic appearance. Bagworm Moth Thyridopteryx ephemeraeformis (Haworth) Printable PDF Click on images to see larger view. 4 Tbsp. Table 1 Some insecticides labeled for bagworm. Chemical control becomes less effective as the season progresses because of the increased size of the larva and its bag. So, you need to spray both the upper and lower surfaces of the leaves of your affected plants for better results. These caterpillars are known for the cone-shaped bag they create around themselves, hence their name. Bagworms are slow spreading because the female doesn’t fly around. The tiny caterpillars are hard to see and their 1 1/2- to 2-inch bags are camouflaged because they are made from parts of the plant. Controls armyworm, bagworm, beetle, caterpillar, Emerald Ash Borer, thrip and other listed pests For residential use on fruits, nuts, citrus and ornamentals One pint treats over 2,500 sq. Sevin ® Insect Killer Ready to Spray attaches to a common garden hose and does the mixing and measuring as you work, providing thorough coverage for evergreens or ornamentals. Biorational: C: READ AND FOLLOW ALL LABEL INSTRUCTIONS. In the fall, the insects use their silk and pieces of the tree to create a camouflaged, cocoon-looking bag, which they fill with up to 1,000 eggs! How to Get Rid of … When t he caterpillars are no longer feeding, the tree will not experience additional damage beyond what has already occurred, and most importantly, spraying after that point is a complete and counterproductive waste of time and money. When populations are high, bagworms are serious defoliators of plants. Bagworm larvae injure plants when they feed on needles and leaves. Below is the life cycle of the bagworm so you can understand why now is the time to spray for control. Bagworms, found throughout the Eastern United States, are a major pest for evergreens. Trees such as sycamore, willow, and other deciduous trees, usually refoliate after an episode of heavy defoliation. Get free shipping on qualified Bagworms Pest Control or Buy Online Pick Up in Store today in the Outdoors Department. The female lives her entire life in the bag, producing up to 1,000 eggs and dying. Bagworm Damage and Control What do bagworms look like? WASHINGTON – Evergreens throughout the region are being confronted with a new kind of enemy: the bagworm. Courtesy of Cathy Thomas, PDA. Bagworms fill your tree with hard, brown bags that hang down like Christmas ornaments. The ultimate goal for a bagworm spray program is to eliminate larvae, or, at least to reduce their populations to non-damaging levels. How To: Get Rid of Bagworms If you don't keep a weather eye out for these voracious little critters, you may wind up with brown, damaged, or even dead trees or shrubs. Older larvae strip evergreens of their needles and devour whole leaves of susceptible deciduous species leaving only the larger veins. Destruction begins as the larvae leave the bag, construct their own bags and begin feeding on the arborvitae's foliage. Young caterpillars feed on the upper epidermis of host plants, sometimes leaving small holes in the foliage. A two-spray schedule is recommended in situations where the previous season’s bagworm activities caused serious damage. Bagworm Damage. The bacterium, Bacillus thuringiensis subsp. Always destroy the bags. Product Type. By: Jackie Carroll 21 September, 2017. Lifecycle. The evergreen bagworm's case grows to a length of over 6 cm, tapered and open on both ends. The young larvae feed on the upper epidermis leaving small brown spots on the leaves. In late summer and early fall, the Bagworms build small bags of twigs, leaves and silk to hold their eggs over the winter. Older larvae strip evergreens of their needles and consume whole leaves of susceptible deciduous species, leaving only the larger veins. Bagworm larval bag attached with silk to eastern white pine. Biorational: C H H: Tebufenozide (Confirm) 25% EC: 4 - 8 oz. The most commonly observed form of this pest is the spindle-shaped silk bag camouflaged with bits of foliage, bark, and other debris. Step 4 Puncture the side of the bagworm bag with the pointy end of the stick. The larva uses its silk to hang from trees and can be transported by the wind to other plants. Older larvae strip evergreens of their needles and devour whole leaves of susceptible deciduous species leaving only the larger veins. They are not feeding at this time and are in the process or getting ready to reproduce. When it comes to pine trees, their sacks are mistaken for actual small pine cones. Bagworm caterpillars feed for about six weeks, enlarging the bag as they grow and withdrawing into it when disturbed. Easily apply this concentrate using an Ortho® Dial N Spray® applicator. Damage Caterpillars will hatch and emerge from the bags in spring and begin to feed on tree leaves. Damage by mature larvae is especially destructive to evergreen plants. Yearly, there is a 4-5 week period during which larvae emerge from eggs. How to Kill Bagworms on Evergreens. The bagworm (T. ephemeraeformis) found on most evergreens lives in east-central Texas, from the Oklahoma state line to the Gulf Coast. Eggs are laid in the fall and hatch in the spring. This formula can be used on ornamentals, roses, flowers, shrubs, trees, fruits, citrus and vegetables. Bagworm eggs begin to hatch at the end of May or beginning of June. Even if caterpillars are still visible, spraying this late in the season may not be effective. They may look like pine cones or other plant structures. For outdoor home use only; Specifications .