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Pests and diseases can remove all beautiful, healthy qualities from your plant material within a short period of time. Some pests and diseases are known to completely destroy plant material. Know the facts and know what to look for to save your plant material!
Daylily Leaf Streak
Leaf streak is a common disease among daylilies that doesn’t always cause complete damage to the plant but it can cause substantial leaf loss. In some rare cases this disease can cause defoliation of daylilies. This disease is most common in warm, wet weather.
Leaf streak is caused by a fungus known as Aureobasidium microstictum. Spores that are on the infected leaves will start the disease process each spring. When this disease occurs, there is a chance that the infected leaves can lead to additional infections on healthy leaves.
The yellowing appears at the leaf tips and spreads along and outward from the midveins of the leaves. Red-brown flecks are sometimes also seen along with this disease and they appear as a red-brown spot with yellow halos around them. Sprinklers can cause leaf streak to spread and the wet leaves can lead to additional infections!
If you currently see this disease present on your daylilies, be sure to remove the infected leaves right away, and if additional infected leaves become present remove them as they appear. Fertilization of plant material is very important and crucial to plant longevity and health. Be sure to water directly into the soil using a soaker or a drip hose. Remember to plant your daylilies in small clumps to improve the air circulation.
Emerald Ash Borer
Emerald Ash Borer, also known as Agrilus Planipennis, is an enemy for Ash trees that relocated in the United States from Asia. This pest was confirmed in Toledo, Ohio in 2003 and has spread throughout Cleveland, Cincinnati, Columbus and Dayton throughout the years. The above picture is an adult Emerald Ash Borer and they are known to be 1/2 inch long and 1/8 inch wide
Once your Ash tree has been infested with this pest, it will die within three to five years. These adult pests are only known to fly around from mid-May to September. As an adult, the Emerald Ash Borer will nibble on the ash foliage but cause little damage. The larvae will spend their time developing beneath the bark of your tree. While the larvae are developing, they feed on the inner bark of the Ash trees, which will disrupt the tree’s ability to transport water and nutrients.
These pests have cost property owners, nurseries, cities and municipalities to spend millions of dollars to remove and replace their Ash trees. The USDA has had to enforce quarantines and fines to prevent the possibility of this pest being spread across county and state lines.
Asian Longhorned Beetle
The Asian Longhorned Beetle, also known as Anoplophora Glabripennis, is a very invasive, wood-boring beetle and has no known predators. The ALB is known for feeding on a wide variety of trees and it will kill the trees eventually. After three to four years of infestation, you will notice that the pests are in your trees. After ten to fifteen years, the tree will be dead depending upon health and site conditions and no longer able to be recovered or regenrated.
As an adult, you are able to see the beetle due to it’s size of 1-1.5 inches, long antennae and their black and white colors. They start off as an egg, move to a larva, a pupa, then their adult stage. Report any signs of this pest to your local department of agriculture immediately. The adult females will chew holes in to the bark and leave their eggs under the bark, which allows the growing cycle of the larva to involve feeding off of the tree, tunneling through the tree and eliminating all nutrients and new growth areas for the tree.
Adult beetles are usually active during the summer and early fall, but have been spotted from April to December. The trees that are affected by the ALB most are as follows: Ash, Birch, Elm, Golden Raintree, London Planetree/Sycamore, Maple, Horsechestnut/Buckeye, Katsure, Mimose, Mountain Ash, Poplar and Willows.
This pest poses a severe threat to our hardwood forests and nurseries, which makes it illegal to remove firewood, stumps, branches and any other material that has fallen from all hardwood species. The Asian Longhorned Beetle was discovered in Tate Township and now has caused restricted areas across Clermont County. As of now, this pest has been discovered in New York, Illinois, New Jersey, Massachusetts and Ohio.
The Japanese Beetle, also known as Popillia Japonica, arrived in the United States from Japan. They affect states such as Michigan, Wisconsin, Illinois to Alabama. The most damaging populations are from Cleveland to Cincinnati in Ohio.
As an adult, the Japanese Beetle is an herbivore and has fed on over 400 species of broad-leaved plants. The adults mostly favor roses, flowering cherry trees and zinnias. Their larvae prefer to feed on plant roots, ornamental trees and shrubs, garden and truck crops and turfgrasses. If you hear the term “white grub” mentioned, that refers to the larvae of the Japanese Beetle.
Adults will eat the leaf tissue between the veins of the leaves, but leave the veins behind. If your leaves look like lace, that means this pest has killed that leaf off and will be heading for another. Flower buds and fruit are also companions to the adult Japanese Beetle! Grubs are known for damaging turf and small seeding plants, but they prefer turf over other plant material. If you turf seems to be off-color, as if it’s needing water, there is a chance that the white grubs have invaded your turf. Spongy turf along with discoloration should prompt you to pull back your turf, as if old carpet, and there will be the grubs.
Japanese Beetles have the same life stages as the Asian Longhorned Beetle: Eggs, larvae, pupae and adults. The adults are metallic green and 3/8 of an inch long. The wings are copper and their underside has white hair in rows. Males have a sharp tip on the foreleg tibia and the female has a long rounded tip.
During the last week of June going into July, the new adults will immediately make their way out of the turf to feed on small, low growing plant material. Once the new adult has damaged the leaves, the odors that are released will attract other adults in great quantity to come feed as well. After feeding the females will bury into the ground to lay eggs. Depending upon the weather, quality and condition of the turf, eggs can develop within a week or two.
The Japanese Beetle tends to feed on Japanese and Norway Maples, Birch, Pin Oak, Horse Chesnut, Rose of Sharon, Sycamore, Ornamental Apple, Plum, Cherry, Mountain Ash, Willows, Boxwood, Holly, etc. They are not picky when it comes to eating!
We can provide lawn and tree/shrub applications that protect against diseases and pests! Contact our experts today to ensure your landscape plants and turf are protected!