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Download insect pests of forages - Georgia Forages
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2015 Forage Conference @ GCA Convention Insect Management Update INSECT MANAGEMENT IN PASTURES AND FORAGES Armyworms DR. WILL HUDSON University of Georgia FALL ARMYWORMS Fall Armyworm ! ADULTS - MOTH ! EGGS LAID IN MASS ! GENERATION - 28 DAYS ! OVERWINTERS IN FL. ! DRY SUMMERS OFTEN WORSE CHINCH BUG ARMYWORMS ! SUCK PLANT ! SYMPTOMS: GRASS BLADES EATEN ! THRESHOLD: 2-5 LARVAE PER SQ. FT. ! TREATMENT: LANNATE, PYRETHROIDS, SEVIN, OR DIMILIN ! PREVATHON IS GOLD STANDARD ($$$) Dr. Will Hudson Extension Entomologist UGA Extension JUICES ! CAUSE PLANTS TO BE STUNTED ! CAUSE YELLOWING AND DEATH ! DIFFICULT TO CONTROL 1 2015 Forage Conference @ GCA Convention Insect Management Update CHINCHBUG WHITE GRUBS ! ADULTS ARE BEETLES ! SEED TREATMENT The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again. MAY PREVENT BUILD-UP ! MORE PROBLEMS IN NO-TILL ! LORSBAN WHERE LABELLED, MUSTANG MAX, BAYTHROID WHITE GRUB CONTROL ! IDENTIFY SPECIES ! SEVIN OR PYRETHROIDS FOR GREEN JUNE BEETLE ! OTHERSCOMPLETE RENOVATION AND REPLANTING Sugarcane Beetle ! Adults do the damage, from late April through June or later. ! Grubs feed on organic matter, like GJB ! Target adults with Sevin, pyrethroids Dr. Will Hudson Extension Entomologist UGA Extension 2 ! ONE GENERATION PER YEAR (MOST) ! MORE SEVERE WHEN USING CHICKEN LITTER ! PREFER NONENDOPHYTE FESCUES, ANY WARM-SEASON GRASS 2015 Forage Conference @ GCA Convention Insect Management Update Bermudagrass stem maggot ! Bermudagrass stem maggot Atherigona reversura ! First found in 2010 ! Georgia is first place in western hemisphere to have BSM ! Maggot chews stem at the first node, killing the last 2 leaves Photo by S. Carlson Photo by L. Wiggins ! BSM Damage ! BSM Damage Photo by S. Carlson FIRE ANTS Fire ant mound ! NUISANCE PEST ! TREATMENTS MAY INCREASE POPULATION ! TOTAL MOUND TIME ABOUT 6 MONTHS Dr. Will Hudson Extension Entomologist UGA Extension 3 2015 Forage Conference @ GCA Convention Insect Management Update Fire ants swarming FIRE ANTS CONTROL OPTIONS A ! BAITS – AMDRO - AT 1.0 TO 1.5 LBS/AC – LOGIC - AT 1.0 TO 1.5 LBS./AC ! Not for pastures where food animals graze – EXTINGUISH AT 1.0 - 1.5 LBS./AC B ! MOUND TREATMENTS – ORTHENE – PYRETHROIDS Dr. Will Hudson Extension Entomologist UGA Extension 4 Dung Beetles Dung beetles, which are in the Scarabaeidae and Geotrupidae insect families, play an important role in pastures. They consume large amounts of animal manure (dung) and use the dung as habitat. Consequently, they help to incorporate animal manure into the soil, increasing the soil organic matter content and improving the fertility, water holding capacity, and physical characteristics of the soil. Their actions have also been credited for reducing pasture fouling (areas that aren’t grazed by the animals because of the presence of manure) and taking away nesting habitat and food resources for flies (particularly the horn fly, Haematobia irritans, and the face fly, Musca autumnalis). These and other beneficial insects can be killed by insecticides applied to control pests. The best way to preserve the ecosystem services from dung beetles and others is to use insecticides sparingly.
