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Fruits
Volume 57 Number 20 Date 08/30/2012 SPOTTED WING DROSOPHILA - Larvae are infesting blackberries and raspberries in southwestern and west-central Wisconsin, and potentially many other areas of the state. Berry growers are advised to randomly sample late-ripening varieties and plantings and contact DATCP at 1-866-440-7523 if white maggots are found. Canes with infested fruits should be removed with the fruit attached to prevent spotted wing drosophila from multiplying on the unharvested berries. Overripe and fallen fruits are highly attractive to the adult flies and also should be discarded. APPLE MAGGOT - Fly activity has decreased in most areas but enough adults are still present to cause problems in late varieties. Counts varied from 1-9 per trap for the period of August 23-29, with the weekly high count registered in Bayfield County. JAPANESE BEETLE - Reports of continued feeding in raspberry plantings were received in the past week. The cooperator near Chippewa Falls noted that beetle numbers are not alarming, but several of his customers have commented on their presence. Levels in orchards currently vary by region of the state and the effectiveness of the control measures applied earlier this month. CODLING MOTH - Counts have declined to the lowest levels of the season at most sites. The weekly average based on reports from 22 orchards was less than four moths per trap, although an exceptional count of 25 moths was recorded at Mineral Point in Iowa County. The Iowa County moths may be representatives of a third flight. Growing degree day accumulations are adequate for a third flight and partial third generation of larvae this year. Larvae from late-season flights usually do not complete development before winter conditions arrive or the fruit is harvested. OBLIQUEBANDED LEAFROLLER - Orchardists are reminded to monitor pheromone traps for this insect and the Oriental fruit moth regularly throughout September, long after spraying is discontinued. Second generation larvae occasionally cause significant fruit damage late in the growing season. --Krista Hamilton, DATCP Entomologist 
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