National Seed News
POSTEMERGENCE CRABGRASS CONTROL WITH QUINCLORAC
Quinclorac has shown to be a good-excellent post crabgrass herbicide. Quinclorac also exhibits some broadleaf activity, especially on legumes like black medic and clover. Drive activity is very rapid, with crabgrass kill occurring within 1-2 weeks after herbicide application. Young (non-tillered) crabgrass may brown & die in less than one week.
The Good Guys
Every once in a while it pays to stop and think for a minute. It is human nature to see an insect and want to get rid of it. We should rethink that. There are a lot of insects that are harmless. More importantly there are some that help us. Our scouts have been bringing in good guys regularly, including ladybug larvae (fig. 1), a pupating ladybug (fig. 2), and an assassin bug nymph. These insects feed on other insects. Sometimes they do wander into our homes and become a nuisance, but when they are outside, they are beneficial to the gardener. The bottom line is to take a minute to think before you squash or spray an insect. Sometimes they are the good guys.
Source: Morton Arboretum
Viburnum Leaf Beetle
Viburnum leaf beetle has been known in some eastern states since the early 1990’s. It is a relatively new pest to the Chicago region. A few possible sightings of this pest were reported in 2013 and 2014. In 2015, the beetle was reported across the Chicago region with some regularity. This insect feeds as both larvae and adults and can do extensive damage. If left unchecked it can lead to the death of the shrub.
Adult beetles are fairly nondescript and are easily overlooked. They are brown and about ¼ inch in length, with the females being slightly larger than the males. Close inspection reveals that the insect is covered with fine golden hairs.
The young (larvae) are tiny upon hatching and will only reach about 1/3 of an inch in length at maturity. Feeding damage may be noted before the actual insect is seen. The larvae vary in color from pale green to pale yellow. The body is marked with black dots along the sides and a row of black dashes along the back. As the larvae grow, they will molt and shed their skin, so cast off skins may be noted on the leaves of the host plant.
Egg-laying sites may be seen on twigs from fall until spring. The actual eggs are not visible. The eggs are laid in small holes on the twigs and then the holes are capped with a mixture or chewed wood and excrement. The caps are dark and stand out against the bark of the twig, making them easy to see. They are often in rows.
Meso 4SC Select™
Selective and Residual Control of Weeds in Turfgrasses
Meso 4SC Select™ generic tenacity is a herbicide that can be used for both pre and post-emergence control of more than 45 broadleaf weeds and grasses in turfgrass. Classified as a group 27 herbicide, Meso 4SC Select inhibits photosynthesis in susceptible plants and is absorbed systemically through leaves, roots and shoots. Meso 4SC Select can be effectively used for weed control prior to and when seeding of specific types of turfgrasses.
- Provides post-emergent control of tough-to-control weeds
- Weeds controlled include crabgrass (pre and post-emergent), ground ivy, yellow foxtail, yellow nutsedge and dandelion
- Can be applied anytime you are seeding including overseeding of established turfgrass, bare ground seeding or during renovation
What is Maple Tar Spot Disease?
Maple tar spot is a very visible problem for maple trees. It starts with small yellow spots on growing leaves, and by late summer these yellow spots expand into large black blotches that look just like tar has been dropped on the leaves. This is because a fungal pathogen in the genus Rhytisma has taken hold.
When the fungus initially infects a leaf, it causes a small 1/8-inch wide yellow spot. As the season progresses, that spot spreads, eventually growing up to 3/4 inches wide. The spreading yellow spot also changes colors as it grows, slowly turning from a yellow-green to a deep, tarry black.
The tar spots don’t emerge right away, but are typically obvious by mid to late summer. By the end of September, those black spots are at full size and may even appear to be rippled or deeply grooved like fingerprints. Don’t worry, though, the fungus only attacks the leaves, leaving the rest of your maple tree alone.
The black spots are fairly unsightly, but they don’t do any harm to your trees and will be shed when the leaves fall. Unfortunately, maple tree tar spot is spread on the wind, which means that your tree can get reinfected next year if spores happen to hitch a ride on the right breeze.
Maple Tar Spot Treatment
Because of the way maple tar spot disease is transmitted, complete control of maple tar spot is virtually impossible on mature trees. Prevention is the key with this disease, but if nearby trees are infected, you can’t reasonably expect to totally destroy this fungus without community support.
Start by raking all your maple’s fallen leaves and burning, bagging or composting them to eliminate the closest source of tar spot spores. If you leave the fallen leaves on the ground until spring, the spores on them will likely reinfect the new foliage and start the cycle again. Trees that have trouble with tar spots year after year may also be struggling with excessive moisture. You’ll do them a great favor if you increase the grade around them to eliminate standing water and prevent moisture build-up.
Trees may require treatment, especially if other trees have had a lot of their leaf surfaces covered by tar spots in the recent past. If you’re planting a younger maple in an area prone to maple tar spot, treat tar spot by applying a fungicide, like bayleton and mancozeb, at bud break and twice again in 7- to 14-day intervals is recommended.
New Seed Mixture
National Seed is excited to announce our new Coat of Armor Mixture, a premium quality partially coated grass seed mixture. Our unique coating delivers key nutrients vital to early plant growth right on the seed. These nutrients, combined with a patented moisture retention coating, provide results not found in any other treatment or coatings. Our Coat of Armor Mixture is for high quality, full sun areas and is perfect for athletic fields and high-end residential areas where appearance and wear tolerance are paramount.
Boxwood blight confirmed in Illinois
PUBLISHED JANUARY 23, 2017
URBANA, Ill. - Boxwood blight, a serious fungal disease, has been confirmed in Illinois. According to a University Diagnostic Outreach Extension Specialist, two boxwood samples were submitted to the University of Illinois Plant Clinic in late 2016. The samples came from Lake and Cook Counties in northeastern Illinois. Both were from recent landscape additions.
“Although the characteristic leaf spots were not apparent on the samples, defoliation and stem cankers were noted,” says Diane Plewa.
The samples were quarantined and, after sufficient incubation, fungal spores consistent with the Calonectria spp. fungi were recovered. The Illinois Department of Agriculture was notified, and samples were sent to the United States Department of Agriculture Animal Plant Health Inspection Service Laboratory in Maryland, where the genus identification was confirmed. Species identification is ongoing.
“To our knowledge, the infected plants where not from Illinois production facilities,” Plewa adds.
Symptoms of boxwood blight include leaf spots, stem cankers, and defoliation. Leaf spots usually appear as light or dark brown circular lesions, often surrounded by a large yellow halo. If the infection occurs near the margin of the leaf, the lesion may be semi-circular or V-shaped. Stem cankers are easiest to see on new, green stem tissue. The cankers are dark brown or black, and are often linear or diamond-shaped.
“Defoliation occurs as the final symptom,” says Suzanne Bissonnette, director of the U of I Plant Clinic.
“Because these symptoms can be similar to other, common fungal and environmental problems on boxwood, we strongly suggest submitting samples to the U of I Plant Clinic for confirmation. We recommend scouting boxwood and pachysandra plants, especially those that were installed in the last few years or plants that are near host plants that were planted recently.”
Boxwood blight is a potentially devastating disease affecting members of the Buxaceae family. The disease has been found on boxwood, pachysandra, and sarcococca. The disease is caused by the fungiCalonectria pseudonaviculata (syn. Cylindrocladium pseudonaviculatumand C. buxicola) and Calonectria henricotiae. To date, C. henricotiae has not been found in the United States.
Bissonnette adds that boxwood blight was formerly federally regulated, but is now regulated at the state level. “Although it can cause widespread death of hosts in the environment, the spores of the pathogen do not appear to travel extensively, reducing its overall impact. However, in production facilities where equipment can be contaminated and expose hundreds or thousands of plants, the pathogen is a much larger concern.”
The pathogen was identified for the first time in the United States in 2011, and has since been found in 18 states. Most are located in the eastern part of the country, though confirmations have been made in Missouri and Ohio.
National Seed's Commercial Strength Iceelt
Blue crystals help provide efficient appication and even ice melting. Melts ice and snow to -15 degrees. Safe for use on treated wood and concrete.
- Designed for Illinois' Harshest Winter Conditions
- Contains RUSH Speed Enhancing Additive
- Dyed Blue For Ease of Application
PROTECT YOUR CUSTOMERS' EVERGREENS THIS WINTER
Anti-desiccant spray applied in the fall coats the foliage of your plants with this layer of organic "sealant" to help the plants resist the drying power of winter winds and conserve the moisture vital to their good health. Properly applied, a winter protection spray will safeguard your valuable plants through the cold months and gradually break down as warm weather approaches and your trees and shrubs begin spring growth.
Fall Tree Fertilizer
NU-ARBOR is a technologically advanced fertilizer recommended for general maintenance applications. NU-ARBOR fertilizers contain superior forms of N-P-K and essential enzymes for root enhancement. Contains food grade urea food grade ortho phosphoric acid food grade potassium hydroxide seaweed extract and sugar. 2-1/2 gal jugs.
For more information contact your sales rep.
Seasonal Needle Dropping
Coming soon to an evergreen near you: seasonal needle drop (also known as normal needle drop).
In autumn, man evergreens will drop older needles. This is a normal process. Needles on an evergreen live for a limited number of years. At the end of their lives, these needles will turn brown and eventually fall off. On some evergreens, such as white pine or arborvitae, this process can be very dramatic, making the evergreen look like it is dying.
To determine if your tree has a disease or is going through normal needle drop, check the location of the browning. Trees going through normal needle drop will have a fairly uniform brown appearance in the interior of the tree since this is where the oldest needles are located. After a few weeks the brown needles will fall off leaving the tree looking normal and healthy. Trees with a disease may have brown needles in various areas of the tree, depending on the disease, but the appearance will not be as uniform as that of needle drop. Diseased needles may eventually fall off, but the tree won’t look healthy.
For more insight on seasonal needle dropping visit The Morton Arboretum website.
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