- 545 - 



YELLOW SUGARCANE APHID ( Sipha flava ) - ARKANSAS - Infestations observed for first 

 time this season in northwest area. Numbers low but aphids easier to find than in 

 past years, indicating gradual buildup. (Boyer) . 



TURF, PASTURES, RANGELAND 



A BILLBUG ( Sphenophorus phoeniciensis ) - CALIFORNIA - Adults 100 per square yard 

 of Bermuda grass turf in El Centre, Imperial County. (Cal. Coop. Rpt . ) . 



GRASSHOPPERS ( Melanoplus spp.) - MARYLAND - Nymphs ranged 3-15 per square yard of 

 grass and legume mixture planted along many State and Interstate highways in 

 Baltimore, Frederick, Washington, and Carroll Counties. May move into adjacent 

 croplands within next few weeks. (U. Md . , Ent . Dept . ) . ARKANSAS - Primarily M. 

 diff erentialis and M. femurrubrum continue troublesome in extreme northwest area. 

 About 1,500 acres treated in Washington County. (Boyer). 



A LEAFHOPPER ( Dikraneura carneola ) - OREGON - Severely damaged Alta fescue, 

 pubescent wheatgrass, and orchard grass on 350-acre range revegetation project 

 on Aldrich Mountain, Malheur National Forest. No controls undertaken this year. 

 Determined by P.W. Oman. (Orr) . 



FORAGE LEGUMES 



ALFALFA WEEVIL ( Hypera postica ) - MONTANA - Infestations on second-crop alfalfa 

 heaviest in many years in Blaine County. Damage in other areas reduced due to 

 parasites and predators. (Pratt, July 16). OREGON - Continuous egg hatch for 60 

 days until mid-July. Many early instars still present. Populations in infested 

 areas (apparently fewer than 1970) about 3 times larger than 1970 in parts of 

 Crook and Deschutes Counties. (Bunch). VIRGINIA - Adults 10 and larvae 5 per 100 

 sweeps in Augusta County field. (Hendrick, July 15). Larvae 25 per 100 sweeps in 

 2 fields in Rockbridge County. (Allen, July 21). VERMONT - Damage moderate to 

 heavy on scattered late-cut alfalfa. (Nielsen). 



BEET ARMYWORM ( Spodoptera exigua ) - ARIZONA - Larvae per 100 sweeps in Yuma 

 County ranged 40-80 at Dome^ 20-150 on Yuma Mesa; averaged 15 in Cochise County. 

 (Ariz. Coop. Sur . ) . 



ALFALFA CATERPILLAR ( Co lias eurytheme ) - ARIZONA - Adult flights heavy in Yuma 

 County; larvae per 100 sweeps ranged 10-30 on Yuma Mesa, 80-900 at Wellton and 

 Dome. (Ariz. Coop. Sur.). 



LYGUS BUGS (Lygus spp.) - MASSACHUSETTS - L. lineolaris (tarnished plant bug) 

 adults 63 per 100 sweeps of alfalfa in Hampshire County field. (Miller). NEVADA - 

 Mostly L. hesperus ranged 8-12 nymphs and 10-20 adults per sweep in alfalfa seed 

 fields at Dixie Valley, Pershing County. Current controls in area ineffective. 

 L. elisus and L. hesperus averaged 1 per sweep in seed alfalfa at Lovelock, 

 Pershing County; controls effective. (Stitt). 



PEA APHID ( Acyrthosiphon pis urn ) - NEVADA - Ranged 10-400 per sweep in Lovelock 

 alfalfa seed fields and 15-600 per sweep in Dixie Valley, Pershing County. 

 (Stitt). UTAH - Ranged 200-300 per 10 sweeps in Millard County alfalfa. (Roberts) 

 Moderate in Box Elder County fields (Lindsay); severe in much Sanpete County 

 alfalfa (Herring). COLORADO - Heavy on second cutting of alfalfa in Bracewell 

 area. Weld County. (Urano) . 



SWEETCLOVER APHID ( Therioaphis riehmi ) - IDAHO - Colonies found on white and 

 yellow sweetclover at Rathdrum, Kootenai County, and at Sandpoint, Bonner County. 

 These are new county records. (Portman) . 



GRASSHOPPERS - MICHIGAN - Generally more abundant in State than for years. 

 Infesting alfalfa as well as roadside weeds and old pastures. Cutting of alfalfa 

 and large populations will force them to move into other crops. Continuing dry 

 weather will intensify movement. (Connin, Ruppel) . MARYLAND - Melanoplus spp. 



