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Third and fourth instars of N. excitans noted infesting 200 acres of 8-year-old 

 loblolly pine plantation (P. taeda ) in Taylor County June 30. (Wilkinson). 



A NOTODONTID MOTH ( Symmerista canicosta ) - MICHIGAN - Most eggs still unhatched, 

 but young larvae feeding gregariously on upper and lower leaf surfaces of white 

 and red oaks. Eggs average 1.9 masses per leaf; highest counts 7.5 masses per 

 leaf in Hardy Dam area of Newaygo County. All surveys indicate very heavy 

 population this year; infestation may spread. Currently limited south of line 

 from Manistee to Brethren, across Red Bridge to U.S. Highway 37 to Bristol to 

 U.S. Highway 131 south. (Eiber, Wallner). 



ASPEN BLOTCHMINER ( Li thocolletis tremuloidiella ) - MICHIGAN - Very heavy again 

 this year on aspen in western half of Upper Penninsula; ranged 7-24 mines per 

 leaf . (Sauer) . 



LINDEN LOOPER ( Erannis tiliaria ) - NORTH DAKOTA - This pest and cankerworms 

 completely defoliated Siberian elm shelterbelts in Walhalla area of Pembina 

 County. Larvae completed feeding; most have pupated. (Brandvik et. al.). 



A TORTRICID MOTH ( Archips semiferanus) - PENNSYLVANIA - Larvae, 500 per 30-inch 

 branch sample, infested one million acres in north-central counties; defoliation 

 severe. Complete stripping of foliage observed in southern Elk, northern Clear- 

 field (Quehanna area), Clinton, northern Cameron, southern Potter, western 

 Lycoming, and western Centre Counties. Extensive tree mortality reported fall 

 1970 on 162,000 acres; continued over winter. Many red oaks on several thousand 

 acres in southern Potter County, as well as white and chestnut oaks, have now 

 been defoliated twice and tree mortality will be evident in late summer. On Pine 

 Creek Plateau in western Lycoming and eastern Clinton Counties, where outbreak 

 originated in 1967, natural controls finally becoming effective (after most of 

 forest destroyed); larvae diseased and Coccinella novemnotata (a lady beetle) 

 very abundant and feeding on larvae. Control program completed on 2,200 acres 

 a-t Black Moshannon State Park June 1-3; insect mortality generally 99 percent; 

 also equally effective on Croesia semipurpurana (oak leaf tier) and A. 

 argyrospilus (fruittree leaf rollerT"! (Nichols) . 



OAK LEAFTIER ( Croesia albicomana ) - PENNSYLVANIA - Defoliation heavy on pin oak 

 in French Creek State Park, Berks County, and on red, scarlet, and black oaks in 

 Pine Grove Furnace State Park, Cumberland County, where infestation extended 

 northward to Mt. Holly Springs; several other counties also affected. (Nichols, 

 June 24) . 



FOREST TENT CATERPILLAR ( Malacosoma disstria ) - PENNSYLVANIA - Defoliation 

 moderate to heavy on sugar maple, red oak group, black cherry, aspen, and other 

 species in parts of Somerset, Bedford, Westmoreland, Blair, Cambria, Indiana, 

 and Clearfield Counties. Outbreak largely subsided in southern Somerset and 

 Bedford Counties where originated in 1968; decline due largely to polyhedral 

 virus; parasitic sarcophagid flies building up in several other areas. New areas 

 north of Somerset County becoming infested with M. disstria ; spraying program 

 on 1,700 acres in Prince Gallitzin State Park, Cambria County, prevented heavy 

 defoliation, but control spotty. Larval and foliage development much delayed this 

 year by cold weather. (Nichols). Larvae pupating June 23 in Somerset County. 

 (Cameron). NORTH DAKOTA - Larvae about full grown with some pupation in infested 

 area near Fort Totten, Benson County. Defoliation light but more widespread than 

 last year; 1971 is fourth year of defoliation. Parasites and diseases reduced 

 populations this season. (Brandvik). 



OAK LEAF SKELETONIZER ( Bucculatrix ainsliella) - RHODE ISLAND - Second and third 

 instars heavy throughout State. Second generation may be very heavy. (Relli, 

 Field) . 



