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FORAGE LEGUMES 



ALFALFA WEEVIL (Hypera postica ) - NEVADA - Larvae ranged up to 60 per sweep in 

 several alfalfa hay and seed fields in Lovelock area, Pershing County, controls 

 applied. Infestations spotted. (Stitt) , Adults and larvae averaged 2-3 per sweep 

 on 500 acres of seed alfalfa at Kings River Valley, Humboldt County. (Peters). 

 UTAH - Damage heavy to first crop alfalfa in Sanpete County. Much control applied. 

 (Judd) . Damage moderate in Duchesne County. (Hunsake) . NEW MEXICO - Adults 2-5 and 

 larvae 15-22 per 25 sweeps of alfalfa at Bloomfield, San Juan County. Damage 

 light and controls applied. (Heninger, Campbell) . WYOMING - Counts 3-20 per 10 

 sweeps in second cutting alfalfa in Laramie, Goshen»and Platte Counties. F>upation 

 50-90 percent. (Parshall) . SOUTH DAKOTA - Caused economic damage to 80 acres of 

 320-acre planting of alfalfa south of Draper in Jones County. Alfalfa cut 

 and stacked. Furthest east that heavy infestation known to occur in State. (Jones, 

 Edwards). WISCONSIN - Few second to fourth instars still in alfalfa; averaged 1 

 per sweep in some second-growth fields in Grand County. (Wis. Ins. Sur.). 

 MICHIGAN - Injury severe in volunteer alfalfa in Gladwin County. Most damage 

 avoided by cutting alfalfa at proper time. (Sauer) . VERMONT - Severe in many 

 areas, particularly on second cut alfalfa. Some areas averaged 25 per sweep. 

 (Nielsen, June 29) . 



LESSER CLOVER LEAF WEEVIL (Hypera nigrirostris ) - WISCONSIN - Adults emerging, 

 common in alfalfa and clover mixes in Taylor and Clark Counties. Counts ranged 

 up to 5 per 50 sweeps. (Wis. Ins. Sur.). 



ALFALFA CATERPILLAR (Colias eurytheme ) - ARIZONA - Larvae 30 per 100 sweeps of 

 alfalfa in Yuma County. (Ariz. Coop. Sur.) . NEW MEXICO - First instars 0-3 per 

 25 sweeps of alfalfa in southern Dona Ana County. (Riddle). 



BEET ARMYWORM (Spodoptera exigua) - ARIZONA - Larvae per 100 sweeps of alfalfa 

 in Yuma County: 10 on Yuma Mesa and 20 in Yuma Valley. (Ariz. Coop. Sur.). 

 TEXAS - Moderate to heavy on alfalfa in Martin County. (Neeb) . 



LYGUS BUGS (Lygus spp.) - ARIZONA - Count per 100 sweeps of alfalfa in Yuma 

 County: 350 in Gila Valley, 520 in Yuma Valley, 600 on Yuma Mesa. (Ariz. Coop. 

 Sur.). NEW MEXICO - Ranged 25-100 per 25 sweeps at Farmington, San Juan County, 

 and 0-3 per 25 sweeps in Salem, Dona Ana County. (Riddle, Heninger) . WYOMING - 

 Adults and nymphs ranged 3-11 per 10 sweeps in second- cutting alfalfa in 

 Laramie, Goshen, and Platte Counties. (Parshall). 



GRASSHOPPERS - OHIO - Melanoplus spp. increasing in southern alfalfa fields. 

 (Flessel) . KENTUCKY - Grasshopper nymphs and adults averaged 930 per 100 sweeps 

 of mixed clover and vetch and 180 in red clover in Warren County. (Barnett) . 

 WISCONSIN - M. sanguinipes adults detected along margins of alfalfa and corn 

 fields in Waushara and Clark Counties. M. bivittatus nymphs in last instar and 

 common in some alfalfa in north-central region. (Wis. Ins. Sur.). 



ALFALFA PLANT BUG (Adelphocoris lineolatus ) - WISCONSIN - Nymphs ranged 1-6 and 

 adults 0-2 per sweep in southwest. Adults predominate, averaged about 20 per 

 sweep in western Dane County, ranged 10-30 per sweep in Marathon, Lincoln, 

 Taylor, and Clark Counties. (Wis. Ins. Sur.). 



THREECORNERED ALFALFA HOPPER (Spissistilus festinus ) - ARIZONA -Counts per 100 

 sweeps of alfalfa in Yuma County: 50 in Yuma Valley, 60 on Yuma Mesa. (Ariz. 

 Coop. Sur.) . 



PEA APHID (Acyrthosiphon pisum ) - WYOMING - Ranged 10-75 per 10 sweeps in second 

 cutting alfalfa in Laramie, Goshen, and Platte Counties. (Parshall). 



