![]() Wingless males are produced in the fall and mate with wingless females, each of which lay a single overwintering egg. In summertime, females give birth to live young (parthenogenesis). There, they feed on wounds on trunks and branches and move to the root zone. Wingless nymphs feed on new growth and twigs for two generations (May and June), producing winged forms that fly to other host plants (apple, hawthorn and mountain ash). Eggs are laid in bark cracks on elm in the fall and hatch in early spring. Winter is spent in the egg or young nymphal stages underground in root galls, and as adult egg-laying females on the branches and trunks of host plants. Life Cycle: Simple metamorphosis parthenogenic. Masses of woolly aphids infest the undersides of leaves on terminal growth, causing leaves to turn pale green and curl. ![]() At certain times during the summer, infestations can become noticeable on host plants such as Arizona ash in central Texas. Several other aphid species ( Paraprociphilus spp., Eriosoma spp., Stegophylla spp.) produce large quantities of woolly wax filaments and infest leaves of alders, elms and oaks. Scientific Name: Eriosoma lanigerum (Hausmann)ĭescription: Aphids are reddish-purplish, wingless or winged and covered with woolly, bluish-white wax masses. When there is a need for pesticides, organic or synthetic, be sure to read, understand, and follow the directions on the label.Wooly apple aphid, Eriosoma lanigerum (Hausmann) (Homoptera: Aphididae), damage to apple roots. Whenever possible, use of low impact pest control methods helps to preserve the predators and reduce the need for constant intervention on your part. This "resurgence of pests" occurs much more rapidly than the resurgence of the predators, so it becomes necessary for you to continue to intervene with streams of pesticides or water to keep the aphids under control. Pesticides that kill the lady bugs result in the later return of aphids without opposition from the predators. If you use insecticides, you can kill the aphids, but you will also kill the lady bugs, lace wings, syrphid flies, and other aphid predators. This will reduce the need for you to be out washing the aphids off. In time they will appear and eat the aphids, keeping the aphid population low enough to limit their damage. There are several "good" bugs that eat aphids. When you don't use insecticides, you maintain an environment that allows beneficial insects to increase. They will try to climb back onto the plants, but you can keep washing them off. You will not get all of them in that manner, but you should reduce the number of aphids to a level that causes little damage. However, I agree with your use of strong streams of water to just wash the aphids off the stems. I am surprised that a spray labeled for control of aphids did not work well because aphids are not especially hard to kill. At least the bushes are flowering although not as abundantly as last year. This seemed to help although it did not completely solve the problem. I ended up just hosing down the aphids when I water my lawn. I bought a spray recommended by a nursery, but this did not work. I noticed aphids early this spring attacking my Spanish brooms. The greater the depth of roots in the soil, the more efficiently you may irrigate and the less subject the root system is to drying and temperature damage. Grass roots can reach greater depths in properly prepared soil (by rototilling deeply). If you have an automatic irrigation system that runs regularly and keeps the soil moist, it would be wise to skip one or two irrigations.įrom this, don't think that four inches is the ideal depth of irrigation. If the soil is moist to a depth of at least four inches, you can dispense with irrigation for that day. If the soil is moist six or more inches deep, the probe will penetrate the soil easily to the depth of the moist soil. Use a long screw driver, shovel, or other metal probe to test soil for soil moisture. You should check the depth of moist soil to determine if you need to irrigate. This will be worse if the ground is not level and the water easily runs off. ![]() If the rain falls rapidly and run-off occurs, then there was little water absorbed into the soil. Whether or not you need to continue to irrigate your lawn depends on how much water the soil in your lawn has absorbed. Can I stop watering my lawn at least for a week or so? Answer: Issue: JRain and lawn watering in New Mexico Question: ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |