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Soybeans
Volume 62 Number 5 Date 05/25/2017 SOYBEAN APHID - Colonization of Wisconsin soybeans could begin by early June if milder weather predicted for next week spurs soybean emergence. During the last decade, the first recorded aphid observations have ranged from as early as May 24 in 2007 to as late as June 9 in 2009. In most years, aphids are detectable by the time soybeans reach the V1 stage. BEAN LEAF BEETLE - Adults overwintered from last season have been found in only three of 192 alfalfa fields sampled as of May 24. The beetles were collected from two fields in Grant County and one in Sauk County. The very low number of beetles noted this spring signals a low risk of early soybean defoliation in June. -- Krista Hamilton, DATCP Entomologist 
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