- Oct 15, 2017
- Reaction score
- mid-Michigan, USoA
No, metallic green. They are an invasive species, and have been gradually spreading westward from the Atlantic coast, only appearing here about 5 years ago. According to the distribution maps, they are present in Ontario. The grubs feed in sod, and the adults attack many plants - especially beans, soybeans, mallows (including okra), grape vines, roses, raspberries, and even some of my trees. They attack in large numbers, often congregating in one place to strip leaves to the veins. I use commercial baited traps to reduce their numbers, and am currently catching over 100 beetles per day in each trap. I also allow Malva sylvestris "Zebrina" to grow on the garden borders, it is very attractive to the beetles & acts as a trap crop (where I can spray easily them through the fence).
metallic brownish coppery color. the best time to pick them off plants is in the early morning when they are cooler and aren't flying as easily. once they warm up they'll fly away more.
they sure do like beans and grape vines. both of those are good trap crops. and certain beans are more attractive than others Purple Dove is usually one that takes a beating and the soybeans this year are also getting some action. not surprising because the fields all around us are all soybeans and the beetles are on them too but i think they like coming here because i don't spray anything. i'd hate to think what traps would get here. i know i have picked hundreds a day off the wild grape vines for months at a time with no real affect in population or the feeding on bean plants. i don't want to treat because i don't want to affect the butterfly population. i think this is the first year in a while that i've seen monarchs around.