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Extended spring weather brings armyworms aplenty to indiana by ferujkll sdff
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Extended spring weather brings armyworms aplenty to indiana |
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Business,Business News,Business Opportunities
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Courtesy of Purdue University Extension Mild March temperatures extended the spring season and brought armyworm moths to Indiana in populations not so abundant since 2001—a yearentomologists dubbed "The Year of the Armyworm." Purdue Extension's black light trapping network has been findingsubstantial populations of the insect, especially in thenortheastern part of the state. While this isn't necessarily adisastrous scenario, Purdue Extension entomologist John Obermeyersaid corn growers need to be out scouting their at-risk fields. "Though most of the armyworm moths are blown here from thesouthwestern states, a percentage will overwinter in the Midwest ifwinters are mild," he said. "We know that moths have beenactive before our April 17 start date of the black lighttraps." Obermeyer said it's impossible at this point to know how manyarmyworm moths are present or how active they have been in Indiana.But based on when moths were first seen flying in the state, hesaid it's likely that moths not only are actively mating and layingeggs, but there probably are larvae up to three-quarters inchesfeeding on Indiana corn, wheat, grass hay and grass cover crops.
"Corn that has been no-tilled into a grass cover crop,especially annual rye, should be inspected immediately for armywormfeeding," Obermeyer said. "We've been made aware of somewheat fields being converted to corn because of freeze damage, andthese, too, should be considered high-risk. "Hatched larvae will move from the dying grasses to emergingor emerged corn." Armyworm feeding will give corn a "ragged" appearance,and the damage will extend from the leaf margin toward the midrib.There are no other insects this time of year that will display thesame feeding damage that armyworm will, Obermeyer said. "Depending on the population, most of the plant can beconsumed," he said.
Because armyworm feed only at night, Obermeyer said finding theinsect during scouting can be a challenge. In wheat, growers shouldconcentrate on areas of dense growth. They also should inspect fornotching on the leaves once flag leaves have unfurled. Growers alsocan carefully uncover crop residues or soil clods to look forcurled-up larvae. With abundant moths and eggs and larvae already in fields,Obermeyer said farmers need to be diligent about monitoring theirfields multiple times.
While some Bt hybrids might resist armyworm,the insect still can cause significant damage before plant proteinscan reduce feeding. He also noted that seed-applied insecticides will not controlarmyworm, regardless of application rate. I am an expert from Electrical Ceramics, usually analyzes all kind of industries situation, such as buy beach chair , room folding screen.
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