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Looking Ahead
Volume 59 Number 7 Date 06/12/2014 TRUE ARMYWORM - Minor feeding damage to corn has been noted in Crawford, Juneau, Richland and Sauk counties. Small grains, corn and other susceptible crops are under a low to moderate threat of larval infestation this month and should be monitored for developing problems. CODLING MOTH - A substantial flight is under way in most apple orchards. Moths have become very abundant in the past two weeks and a definite potential exists for damaging populations if treatments are not applied on time. Counts for the period of June 5-11 ranged from 0-27 moths per trap, with high counts registered in Dane and Pierce counties. ALFALFA WEEVIL - Larval counts are generally less than one per sweep and leaf feeding damage is still below the 40% economic threshold in most remaining first crop alfalfa fields, but this may change in the week ahead now that the weevil larvae are larger and capable of consuming more foliage. Continued scouting is recommended through first harvest and early second-crop regrowth. EUROPEAN CORN BORER - The spring flight continued for the second consecutive week and is expected to peak by June 15 in the south-central and southwestern counties, June 21 in the southeastern and central areas, and July 1 in the north. Moths are appearing in very low numbers in black light traps and egg deposition is occurring in locations where 450 degree days (modified base 50°F) have accumulated. SOYBEAN APHID - Colonization of VE-V1 soybeans was documented for the first time this season on June 10 in Sauk County. Surveys found aphids in two fields, one near Ironton and the other near Reedsburg. Densities were extremely low at 2-6 aphids per infested plant on only 1-2% of the plants examined. This observation confirms that dispersal to soybean plants has started in southern Wisconsin. -- Krista Hamilton, DATCP Entomologist 
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