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Vegetables
Volume 63 Number 1 Date 05/03/2018 COMMON ASPARAGUS BEETLE - The phenology model for this pest forecasts the first appearance of adults and the start of egg deposition on asparagus spears from 150-240 degree days (simple base 50°F). The lower range of this threshold will be surpassed next week in several southern and western Wisconsin locations. FLEA BEETLE - Measures to prevent flea beetle invasion of spring vegetable crops such as spinach and leafy greens are advised at this time. Overwintered adults are emerging from diapause and can be expected to invade seed beds that are not protected with floating row covers. Seedling and transplants are most vulnerable to flea beetle damage in the first two weeks after emergence and should be inspected every other day during this period of heightened susceptibility. IMPORTED CABBAGEWORM - Adults have been active since late April. The early spring appearance of these yellowish-white butterflies around field plantings and home gardens indicates eggs are being laid on early-planted or transplanted broccoli, cabbage, kale and other cole crops. Two basic measures to reduce early ICW damage are to ensure transplants are free of larval contamination and to install floating row covers or another physical barrier to prevent oviposition on plants. Btk products for ICW control must be applied while larvae are small. -- Krista Hamilton, DATCP Entomologist 
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