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acre adult Agricultural Experiment Station Agronomist Agronomy Farm anuary aphids application of lime-sulphur Asst average blooming period blooming stage bushel cents per acre certiﬁed seed potatoes color Colorado cost of spraying damage disease or trouble dry-land ﬁelds early planted ﬁelds Experiment Station Bul Field number ﬁelds tested ﬁgure ﬁrst grades host plants I8 cents Increase in saleable infested with psyllids insect irrigated ﬁelds Laramie large number late planted ﬁelds lime-sulphur spray means sprayed Ph.D plats sprayed potato ﬁelds potato plant potato production POTATO PSYLLID CONTROL produced proﬁtable psyllid infestation psyllid nymphs psyllid symptoms psyllid troubles psyllid yellows reported saleable potatoes season of I935 set of tubers small tubers Solanacea spray applied sprayed plats sprayer stage of growth stolon symptoms of psyllid table stock test ﬁelds Torrington Total yield tuber is formed tubers from infested tubers harvested unsprayed vine symptoms Wyoming Agricultural Experiment year’s yield and quality yield of saleable