WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Monday, March 25, 2019


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Search results on 03/25/19

1069. Brindley, T.A. and W.E. Shull. 1940. Pea weevil controls.. U of Idaho Extension Bull. #132.
Pea weevil (Bruchus pisorum); dusting with rotenone (1%), apply 20 lb/ac of dust; carrier is talc or diatomaceous earth; much rotenone toxicity is lost in 24 hrs due to sunlight; rough threshold for control is 5 weevils in 25 sweeps; discusses dusting equipment; dusting cost about $1.88/ac.

2693. Homan, H. and L.E. O'Keefe. 1979. Pea weevil and its control.. ID Agr. Expt. Sta. CIS. #475.
Attack pea at flowering; often feed at field margins; do not move quickly, eggs laid in new pods; no damage on dried peas; plant weevil - free seed, sanitize field residue; 1 weevil in 100 sweeps at flowering is economic threshold for processing peas, 3 in 50 for dry peas; winter peas more succeptible than spring peas. T: Weevil infestations, insecticide treatments.

2702. Homan, H., L.E. O'Keefe, and R.L. Stoltz. 1984. Aphids on peas and lentils and their control.. ID Agr. Expt. Sta. CIS #748.
Describes life history of pea aphid and cowpea aphid; natural enemies; virus diseases they spread; early planting an advantage; check threshold levels; insecticide controls listed.

2766. Hulbert, H.W.. 1919. Field pea production in north Idaho.. ID Agr. Expt. Sta. Bull. #115.
1918-1924, 722 acres in peas; often replace summer fallow; peas improve soil condition; yields 10-18 bu/ac and 18-23 bu/ac; variety information, date of planting, planting rate, depth of seeding; harrow after emergence; inoculation response noted; used as a nurse crop for grasses and legumes; WW yields same after peas vs. SF; noted rotation effect; pea weevil - fumigate with carbon bisulphide for seed trt.; also heat seed to 125-140 degrees F; pea aphid a problem.

2955. Idaho Agr. Expt. Stat.. 1937. Annual Report. ID Agr. Expt. Sta. Bull. #221.
Reference to night plowing of border catch crop to control pea weevil (p.13); pea weevil insecticides - derris dust plus tobacco dust; cryolite, derris dust and diatomaceous earth; derris dust and sulfur.

4894. O'Keefe, L.E. and A.L. Antonelli. 1974. The pea leaf weevil. ID Agr. Expt. Sta. CIS #227.
Newly introduced pest; adults feed on foliage; feed on perennial legumes, winter and spring peas; eggs laid on soil, larvae feed on root nodules; single generation each year; seedlings most succesptible to damage, especially to terminal growing point; healthy plants can outgrow a moderate infestation; threshold for control at 1 weevil per plant; apply DDT or methoxychlor when 0.5 weevil per seedling is found. T: life cycle.

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.

6508. Smith, R.H.. 1918. A preliminary report on the clover aphis and methods for its control.. ID Agr. Expt. Sta. Bull. #112.
Very destructive in southern Idaho on red and alsike clover fields for seed; almost total loss; first problems in 1907; natural controls exist - weather, predators, grazing management; using "Black leaf 40" spray.

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