Degree days for root, bulb and leafy vegetable pests – 7 June 2011

In all areas, accumulated degree days have indicated emergence of onion maggot adults and carrot rust fly adults, appearance of tarnished plant bug nymphs and ovipostion in carrot weevil. First generation cabbage maggot adults have been emerging in all areas except Wellington; however, expect to accumulate enough degree days over the next day or so in this area indicating emergence. In the Windsor area, accumulations are approaching 90% oviposition for carrot weevil. In all areas, overwintering eggs for aster leafhopper will be hatching and expect the beginning of emergence of local adults in the Windsor area over the next few days.

Here are the degree days accumulated from April 1st until June 7th, 2011.

* Data provided thanks to Muck Crops Research Station, Department of Plant Agriculture, University of Guelph

 Degree day information for pests