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Extension Entomology

Month: September 2016

Kansas Greenhouse Growers Association 2016 Biological Control Workshop

–by Dr. Raymond Cloyd

 

Kansas Greenhouse Growers Association 2016 Biological Control Workshop

OCTOBER 18, 2016

POTTHORF HALL, MANHATTAN, KS

 

SCHEDULE

8:00 to 9:00 AM         Registration

9:00 to 10:00 AM       Fundamentals of biological control (Dr. Raymond Cloyd)

10:00 to 10:45 AM     How to succeed using biological control (Chris Fifo)

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10:45 to 11:30 PM      The challenges associated with rearing natural enemies (Brian Spencer)

11:30 to 12:15 PM      Panel Discussion: Why we use biological control (Tim Sullivan, Karen Pendleton, and Eric or Evan Nelson)

12:15 to 1:00 PM        Lunch

1:00 to 3:00 PM          Demonstrations and samples of beneficial insects, mites, and nematodes (Dr. Raymond Cloyd, Brian Spencer, and Chris Fifo)

3:00 to 3:30 PM          Conclusion and Evaluation

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Kansas Greenhouse Growers Association

 Biological Control Workshop

October 18, 2016

 

POTTORF Hall

1710 Avery Drive

Manhattan, KS 66503

CICO Park

 

REGISTRATION FORM

 

Name: ­________________________________________________________________________________

 

Business Affiliation: ______________________________________________________________________

 

Address: ­______________________________________________________________________________

 

City/Count/State/Zip: _____________________________________________________________________

 

Phone: ( _____ ) _______________ Fax: ( _____ ) _______________ E-Mail: _______________________

 

Additional Attendees (needed for name badges):

 

  1. ________________________________________ 2. ________________________________________

 

  1. ________________________________________ 4. ________________________________________

 

Total Number Attending: _____________

 

 

 

One Day Event:

 

Individual                                                                              ___________ @ $  50 = __________

Vendor                                                                                   ___________ @ $100 = __________

Student                                                                                  ___________ @ $  15 = __________

 

Please send a check made out to: “The Kansas Greenhouse Growers Association” OR pay with a check at the registration desk at the workshop.

 

 

Return to:            Dr. Raymond Cloyd

Department of Entomology

Kansas State University

123 Waters Hall

Manhattan, KS 66506-4004

Plant Bugs

–by Dr. Jeff Whitworth and Dr. Holly Schwarting

Plant bugs, i.e. tarnished and alfalfa plant bugs, are numerous in alfalfa fields and are causing concern.  However, they typically overwinter as adults in alfalfa without causing any damage and therefore should not be of concern.

tarnished-plant

alfalfa-plant-bug

 

Alfalfa Pest Update

–by Dr. Jeff Whitworth and Dr. Holly Schwarting

 

Potato leafhoppers are still numerous in most alfalfa fields around north central Kansas.  They are causing ‘hopper burn’ which can limit the plant’s ability to translocate nutrients to the roots prior to winter.

potato-leafhopper

hopper-burn

Swathing should help but if you have already cut your fields for the last time this year, monitoring should continue to ensure these little pests don’t cause too much plant stress, especially this time of year.  Hopefully, they will head south to overwinter soon!

 

Soybean Pest Update

–by Dr. Jeff Whitworth and Dr. Holly Schwarting

Many beans have passed the stage that is attractive for bean leaf beetle adult pod feeding.  However, later planted beans are still tender enough to attract these beetles and they are feeding on the pods.

blb-adult

blb-pod-damage

 

This can reduce yield quickly so monitoring needs to continue until the last pods have turned yellow.  Please refer to the 2016 Soybean Insect Management Guide available at: https://www.bookstore.ksre.ksu.edu/pubs/MF743.pdf for management recommendations.

Volunteer Wheat

–by Dr. Jeff Whitworth and Dr. Holly Schwarting

Frequent rain over the last few weeks has played havoc with volunteer wheat control.  Each rain seems to bring another flush of volunteer.

volunteer-wheat

 

This is an ideal situation for most wheat pests, i.e. Hessian flies, winter grain mites, wheat curl mite, and the wheat aphids (mainly greenbugs, bird cherry oat and English grain) as well as the pathogens they may vector.  Thus, please remember to destroy all volunteer at least 2 weeks prior to planting to help manage these pests.

Fungus Gnats in Sorghum

— by Dr. Jeff Whitworth and Dr. Holly Schwarting

We have had several calls this past week about large numbers small black flies/gnats on and around sorghum heads.  These are not a pest of sorghum but a type of fungus gnat and are probably attracted to the fecal material left behind from sorghum headworms.  In general, fungus gnats thrive in damp conditions and the larvae typically dwell in the soil where they feed on algae, fungi, and plant roots.

fungus-gnat

 

Soybean Pest Update

— by Dr. Jeff Whitworth and Dr. Holly Schwarting

Green Cloverworms in Soybeans

Remember a few weeks ago when there was considerable concern relative to all the green cloverworms causing irregular holes in leaves? Even skeletonizing some areas of some fields until treated with an insecticide and/or and entomopathogenic fungus started decimating the larval populations?   Well, the surviving larvae pupated and now are annoying little aerodynamically shaped dark brown moths flying around lights at night or trying to get in through doors and windows.

gcw-close

gcw-defol

gcw-fungus

gcw-adult

These moths will mate and then begin ovipositing in soybean and/or alfalfa fields.  Eggs hatch in approximately 10-14 days and the larvae will again start feeding on leaves of either crop.  By this time of year, the larval feeding is usually of little consequence relative to yield.  However, really late planted soybeans, and all alfalfa fields, should be closely monitored to ensure leaf feeding in either crop does not affect pod fill in soybeans or leaf area in alfalfa.

 

Soybean Podworms

These insect pests seem to be on about the same developmental schedule as green cloverworms.  So, late planted soybeans may be at risk for bean feeding within the pods.

cew-adult

cew-pod-damage

 

Adult bean leaf beetles, while probably not as numerous as in past years, may still be feeding on the pods themselves.  This can cause yield reductions.  For more information on bean leaf beetle biology and control, please visit: https://www.bookstore.ksre.ksu.edu/pubs/MF2824.pdf

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blb-feeding-pod

Woollybear Larvae

Another leaf feeder that can cause concern this time of year is woollybear caterpillars.  There are several different species but all are foliage feeders although they rarely cause any economic problems.

woollybear-white

woollybear-orange

 

Stink Bugs

Hopefully, most soybeans are past the stages that are succulent enough for stink bugs to be feeding on.  However, there are still some late planted beans setting pods with seeds that may be vulnerable to stink bug feeding.  So, until pods are turning yellow or brown, fields probably should continue to be monitored for soybean podworms, adult bean leaf beetles, and stink bugs.

green-stink-bug

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