Browse on keywords: insect ID alfalfa weevil
Search results on 01/18/19
5048. Parks, T.H.. 1913. The alfalfa weevil.. U. of Idaho Extension Bull. #7.
The weevil was introduced into Utah from Europe; feeds principally on alfalfa and sweetclover; spreads by wind; damage done by larvae which eat first crop leaves; injure foliage from May to July; one generation per year; spring tooth harrow in early spring and after first cutting; then go over with a brush drag to crush the insects; 31 species of birds feed on the weevil, also ladybugs; cool spring inhibits damage.
7386. Wakeland, C.. 1921. Fighting alfalfa weevil.. U. of Idaho Extension Bulletin # 50.
Spray with calcium arsenate; "effective and safe"; bio-control agent imported in 1912 - ichneumon fly; it stings the larvae and deposits eggs; questionable level of control.
7395. Wakeland, C.. 1925. Seasonal variation as it affects the activity and control of the alfalfa weevil.. ID Agr. Expt. Sta. Bull #138.
Using calcium arsenate on alfalfa; monitoring effect on cows eating the hay.