There has been some Fusarium stem rot but maintenance of aggressive growing conditions seems to have minimized occurrence of this disease. The major insect pest problems have been aphids and western flower thrips. Integrated control measures with reliance on biological controls have generally kept all pest populations in check. Western flower thrips populations have generally been well managed using biological controls. The Lygus bug has been observed in most operations but no major damage from this pest has yet been reported.
Cabbage loopers are present in most crops.
Damage from the European corn borer has been observed in one or two operations but it has not been severe. The crop benefited from the soil moisture and the canopies are growing very fast. In Alliston, Andovers are sizing up very quickly and harvest of Superiors should start by July 15. Good quality is expected. Colorado potato beetle populations have decreased after Admire applications.