Annual report of the Maine Agricultural Experiment Station . Fjg. 67. Nymphs of the Woolly Aphid, Schisoncura lanigera on watershoot of mountain ash, Pyrus americana,—the immediate progeny ofmigrants from elm leaf rosette. Photographed at Orono, June 28, Fig. 68. Nos. 79-85. Antennae of Woolly Aphid. No. 79—Stemmother from rosette June 5, 1913 (33-13) ; No. 80—Second genera-tion from rosette June 12, 1913; No. 81—Spring migrant from rosetteand progenitor of summer generations on Pyrus (57-13) ; No. 82—Apterous viviparous form on apple bark (98-08) ; No. 83—Fallmigrant from appl
Annual report of the Maine Agricultural Experiment Station . Fjg. 67. Nymphs of the Woolly Aphid, Schisoncura lanigera on watershoot of mountain ash, Pyrus americana,—the immediate progeny ofmigrants from elm leaf rosette. Photographed at Orono, June 28, Fig. 68. Nos. 79-85. Antennae of Woolly Aphid. No. 79—Stemmother from rosette June 5, 1913 (33-13) ; No. 80—Second genera-tion from rosette June 12, 1913; No. 81—Spring migrant from rosetteand progenitor of summer generations on Pyrus (57-13) ; No. 82—Apterous viviparous form on apple bark (98-08) ; No. 83—Fallmigrant from apple (115-06 ; No. 84—Fall migrant from bred colonyon apple; No. 85—Fall migrant from Crataegus. BULLETIN 257. ABSTRACTS OF PAPERS PUBLISHED BY THESTATION IN 1916 BUT NOT INCLUDED IN THEBULLETINS. A complete list of all the publications issued by and from theStation in 1916 is given on pages xii to xiv of the introductionto this Report. The following pages contain abstracts of thepapers issued during the year that are not included in the Bul-letins or Official Inspections for the year. A METHOD OF CORRECTING FOR SOIL HETERO-GENEITY IN VARIETY TESTS.* The correct interpretation of field trials, such as varietytests, fertilizer experiments, etc., is oft
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