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FOREST AND SHADE TREES 



SPRUCE BUDWORM ( Choristoneura f umif erana ) - MINNESOTA - Moth emergence common in 

 Koochiching and northern St. Louis Counties. Pupae in Cook County. (Minn. Pest 

 Rpt.). WISCONSIN - Pupae dominant in Oneida County June 28. Defoliation light on 

 6,000 acres of mixed balsam fir and spruce. (Wis. Ins. Sur.). MICHIGAN - Adults 

 emerged everywhere in outbreak areas of Luce and Mackinac Counties. (Johnson). 



JACK PINE BUDWORM ( Choristoneura pinus ) MINNESOTA - Mostly pupae, some sixth 

 instars still in east-central area! TMinn. Pest Rpt.). WISCONSIN - Fourth to 

 sixth instars dominant in Vilas County June 27. Defoliation light on 3,000 acres 

 of jack pine. Parasitism by Apanteles heavy. Pupation 80 percent in Douglas and 

 Bayfield Counties July 7. Ranged 5-7 per 15-inch of twig. (Wis. Ins. Sur.). 

 MICHIGAN - Endemic populations only in Luce County. Pupation begun. (Johnson). 



JACK PINE SAW:^LY ( Neodiprion pratti banksianae ) MICHIGAN - Outbreak in north Luce 

 County on about 15,000 acres. Defoliation most severe in overmature stands and on 

 adjacent young trees. Late instars stripping many trees. (Johnson). 



YELLOWHEADED SPRUCE SAWFLY (Pikonema alaskensis ) MINNESOTA - Again widespread in 

 white spruce plantations. Middle instars in Carlton and Cook Counties, and later 

 instars in Itasca and Koochiching Counties. (Minn. Pest Rpt.). 



SARATOGA SPITTLEBUG ( Aphrophora sara togensis) WISCONSIN - About 75 percent in 

 third and fourth instars and Js percent in fifth instar June 28 in Vilas County. 

 Light to heavy on 6,000 acres of red pine plantations in Oneida and Vilas Counties 

 June 30. Fourth and fifth instars dominant at latter site. 



WEEVILS - MINNESOTA - Hylobius radicis (pine root collar weevil) beginning to 

 pupate in central Pine County. Heavy on Scotch pine in area. (Minn. Pest Rpt.). 

 MICHIGAN - Pissodes strobi (white pine weevil) larvae ate back through 1970's 

 growth on infested trees. Drooping leaders apparent throughout Upper Peninsula in 

 open jack pine plantations. (Johnson). DELAWARE - P. strobi damage at Hockessin, 

 Castle County. (Boys) . 



LARGE ASPEN TORTRIX ( Choristoneura conf lictana ) WISCONSIN - Defoliated 60 percent 

 of 2,500 acres of quaking aspen in Menominee County by June 14. Pupae dominant at 

 that time. (Wis. Ins. Sur.). MINNESOTA - Egg masses very common in St. Louis, 

 Lake, Cook, and Carlton Counties. Outlook for serious aspen defoliation in 1972. 

 (Minn. Pest Rpt.) . 



A NOTODONTID MOTH ( Symmerista canicosta ) MICHIGAN - Hatch should be complete soon. 

 (Wallner). Egg survival high, over 95 percent. Preliminary egg surveys indicate 

 more widespread defoliation than in 1970. Average of 19 egg masses per 1,000 

 leaves . (Fiber) . 



SADDLED PROMINENT ( Heterocampa guttivitta ) - WEST VIRGINIA - Damage light to 

 sugar maple saplings in Braxton County. Larvae collected at Sutton, by 

 R. D. Whipkey July 7, 1971. Confirmed by A.E. Cole. (W. Va . Ins. Sur.). NEW 

 HAMPSHIRE - Eggs and instars on maple. Larvae 5 per leaf on some trees, possible 

 heavy defoliation at Rumney, Grafton County. (Mason, Hutchins). 



FOREST TENT CATERPILLAR ( Malacosoma disstria ) - PENNSYLVANIA - Many adults emerged; 

 heavy in several hundred acres at Donegal and Cook township, Westmoreland County, 

 July 1. (Dinsmore) . 



SMALLER EUROPEAN ELM BARK BEETLE ( Scolytus mul tis tria tus ) - SOUTH CAROLINA - 

 Collected on 2 winged elms at Rock Hill, York County. One tree dead and other 

 showed symptoms of Dutch Elm disease. Second case of Dutch Elm disease in State. 

 (Witcher , Fox) . 



