(Megan Kennelly, KSU Plant Pathology)
Dr. Raymond Cloyd talks about bagworm biology and management in the post below:
(If you can’t click within that field to read more, click HERE)
(by Jared Hoyle, KSU Turfgrass Research and Extension)
Just yesterday I was out on an extension visit and came across more fall armyworm (FAW) damage. Pulled the turf back and found some small FAW. To get more information on what FAW look like, check out one of the latest blog posts about identification, cultural control, and a little bit about chemical controls for home owners.
With the amounts of sightings increasing I thought I would throw a list of chemical controls for turfgrass professionals for FAW.
FAW and all caterpillar pests are best controlled with insecticides when they are still small. When the caterpillars grow you will have to use a higher rate to achieve control.
|Active Ingredient||Trade Name||Additional Information|
|acephate||Orthene TTO 75WP, Orthene TTO 97 (golf course and sod farm only)|
|bifenthrin||Talstar GC Flowable||Restricted Use Pesticide (RUP)|
|carbaryl||Sevin 80 WSP, Sevin SL|
|cyfluthrin||Tempo SC Ultra (landscape turf only) – RUP, Tempo 20 WP (Golf course only)|
|deltamethrin||DeltaGuard GC 5SC||RUP|
|halofenozide||Mach 2 2SC|
|lambda-cyhalothrin||Scimitar CS (landscape turf only||RUP|
|trichlorfon||Dylox 80 T&O|
Always remember to READ THE LABEL for the correct rate, turfgrass tolerance, and specific instructions before application!!!
***Mention of trade names or commercial products in this article is solely for identification purposes and does not imply recommendation or endorsement, nor is criticism implied of similar products not mentioned by Kansas State University.***
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(by Jared Hoyle, KSU Turfgrass Research and Extension)
Yesterday I received an email from a friend in Kansas City reporting that there have been multiple sightings of Fall Armyworm in Kansas City; Raytown, MO; Tulsa, OK; Wichita, KS; and DeSoto, KS.
Fall Armyworms (FAW) are a tropical insect that migrate from the south. Once they have migrated they can have multiple generations a year. Here in Kansas we can typically have 2-4 generations but it all depends on when the FAW get here. Young FAW are 0.5″ to 0.75″ long and the mature FAW can get up to 1.5″ long. An inverted “Y” on the top of the dark colored head is the best way to identify this pest.
FAW feed on grasses and will eat turfgrass leaf blades down to the crown. Once they finish that leaf they move on to the next. When there are heavy infestations large areas of green turfgrass will look brown in a matter of 24-hrs or less. When this occurs it can give a lawn or turfgrass area the appearance that the turfgrass is moving.
So are we all “shaking in our boots” now? Well don’t worry the FAW seldom kills the grass. It just kind of scalps it down so a flush new growth will restore the appearance of the turfgrass. With some water it will speed up the process.
Information in this blog post is from http://www.hfrr.ksu.edu/doc1628.ashx . Chemical recommendations for FAW control and can also be found at that publication (Shown in pictures below).
So don’t be too worried, but just be aware that they are in the area.
Hope everyone has a great Labor Day weekend!
(By Jared Hoyle, KSU Turfgrass Research and Extension)
What a beautiful day we had this year for the 2014 KSU Turfgrass Field Day. Thank you to all the attendees, vendors, sponsors, faculty, staff, students and anyone else that was out at the field day!
If you weren’t able to make it, I decided to post some pictures and links to research reports so you can get more information about each stop that we had this year.
Also, I will include the QR codes. These codes can be scanned by your phone and will take you directly to the information! Check it out!
This year my stop at field day was “Kansas Turfgrass Weed Control Update”. Here is discussed one of the most problematic weeds in cool-season turfgrass, bermudagrass. I talked about both selective and non-selective methods. For more information about bermudagrass removal check it out here. http://blogs.k-state.edu/turf/non-selective-bermudagrass-removal/
KSU Turfgrass Research Technician and Graduate Student, Jake Reeves, presented information on the best management practices for buffalograss establishment. Jake has been conducting some great research that will really help us out when we want to convert cool-season turfgrass to buffalograss. For more information check out his latest blog post. http://blogs.k-state.edu/turf/establishing-buffalograss-in-golf-course-roughs/
Zane Raudenbush, KSU Turfgrass Graduate Student, and Dr. Keeley has been conducting research on the cultural management of moss infestations on bentgrass putting greens. Zane got to display some great looking research on one of the putting greens out at the Rocky Ford Turfgrass Research center looking at cultural practices in conjunction with chemical applications of carfentrazone. For more information check out his latest research report. http://www.ksre.ksu.edu/bookstore/pubs/SRP1107D-MOSS-FERTILITY.pdf
Ever wondered what was the best preforming kentucky bluegrass cultivar? Well, Evan Alderman, KSU Turfgrass Graduate Student, discussed the best preforming Kentucky bluegrass cultivars in Manhattan, KS. This study is part of the Nation Turfgrass Evaluation Program (NTEP). Check out the NTEP website for the most current bluegrass cultivar information. http://www.ntep.org/data/kb11/kb11_14-2/kb11_14-2.pdf And some more information on prolonged drought and recovery characteristics of Kentucky bluegrass cultivars http://www.ksre.ksu.edu/bookstore/Item.aspx?catId=545&pubId=17861
Although this summer has seen to be pretty mild when it comes to diseases in turfgrass, Dr. Kennelly discussed both turf and landscape disease updates. Don’t forget to periodically check the blog as Dr. Kennelly updates the blog with what is going on with diseases in Kansas. Here is some more information on all sorts of turf disease publications. http://www.plantpath.ksu.edu/p.aspx?tabid=551
Is the grass really greener on the other side? Ross Braun, KSU Turfgrass Graduate Student, presented on using paints and pigments for coloring turfgrass. Ross has conducted many trials looking at painting zoysiagrass and buffalograss. He has evaluated different paints and pigments as well as rates and spray volumes. Check out his latest research update on paints and pigments. http://www.ksre.ksu.edu/bookstore/Item.aspx?catId=545&pubId=17867
As it is hard to grow cool-season turf in Kansas it is also tough to grow warm-season turf. Dr. Fry presented about the best zoysiagrass and bermudagrass cultivars for Kansas. He discussed everything from color to pest tolerance. This included information about how the cultivars held up to last winter. For more information about the zoysiagrass and bermudagrass cultivars here is a great research report about winter survival on the 2013 NTEP zoysiagrass and bermudagrass in Kansas. http://www.ksre.ksu.edu/bookstore/pubs/SRP1107G-NTEP-ZOYSIA-AND-BERMUDA.pdf
Weeds, diseases, and INSECTS! We can’t leave the insects out of field day. This year Dr. Cloyd also gave a turf and ornamental insect control update. For more information about insect control in the lawn and landscape, check out Dr. Cloyd’s list of publications. http://entomology.k-state.edu/extension/insect-information/lawn-garden-pests/lawn-pests.html
Find all the KSU Turfgrass Research Reports online at http://www.ksre.ksu.edu/bookstore/Category.aspx?id=528&catId=545.
Thanks again to everyone that came out to this years KSU Turfgrass Field Day. It was a great success and hope to see you next year in Olathe. Also, don’t forget this December is the Kansas Turfgrass Conference in Topeka. It’s going to be great as well. Keep and eye out for more information on registration.
(By Dr. Ray Cloyd, Dept. of Entomology)
We have seen an “explosion” of the walnut caterpillar (Datana integerrima) in several portions of Kansas. Walnut caterpillar feeds on the leaves of walnut, pecan, hickory, and may also feed on birch, oak, and apple. The larvae tend to feed in groups/clusters consuming all leaves on a single branch before moving to another branch to devour leaves. Excessive defoliation may result in sunscald that could weaken trees and increase susceptibility to wood-boring insects. Walnut caterpillar overwinters as a pupa that is located beneath the soil surface under a host tree. Adults are robust moths that emerge from pupae in mid-to-late spring, depending on temperature and host plant growth. The brown forewings possess irregular dark cross lines. Females deposit eggs on leaf undersides with each female capable of laying >300 eggs in a mass. The first instar larvae or caterpillars skeletonize leaves, whereas the second instar larvae feed on the entire leaf with the exception of the mid-vein. The later instar (third and fourth) larvae, which are red in color, feed on the entire leaf including the petiole. Larvae feed for approximately one month before reaching maturity. Full-grown larvae are 2.0 inches in length, with yellow stripes on the side, and are gray-black and covered with long, gray to white hairs. When disturbed, larvae will arch their head and the end of the abdomen in order to ward off predators. When it is time to molt, they all gather together on a branch or trunk and molt simultaneously, leaving patches of fur-like hair. There may be one to two generations per year. The primary effective means of dealing with infestations of walnut caterpillars are to hand-pick caterpillars and place in a container of soapy water, use a forceful water spray to quickly dislodge caterpillars, or apply insecticides with one of the following active ingredients: acephate, spinosad, malathion, cyfluthrin, permethrin, or bifenthrin. Although the eggs and larvae of walnut caterpillars are susceptible to parasitoids, the female parasitoids may not attack enough eggs or larvae to substantially impact the population.
Raymond A. Cloyd
Professor and Extension Specialist in Horticultural Entomology/Integrated Pest
Department of Entomology
Kansas State University
123 Waters Hall
Manhattan, KS 66506-4004
Phone: (785) 532-4750