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12 hours January 18 hours duration 4-inch pots 500 f.c. adjusted adjusted shade January Agricultural Experiment Station Aphids Average Average axils marked October Blue color controlled daylight fluorescent light duration per day effect of fluorescent f.c. 6 hours f.c. adjusted shade f.c. fixed shade fixed shade February floral initiation ﬂower flower stalk flowers per flower foliage gallon of water growth and flowering high temperature house plant inches initiation of Saintpaulia leaf axils marked leaf cuttings leaf stalks leaves light meter Lindane Louisiana State University malathion Mealybugs obtained overwatering parent plant pests petiole Pink plants grown pollination potting mixture propagated by leaf proper R. H. HANCHEY reached reproductive stage rooting medium sample not sectioned sand satisfactory seedlings shade January 26 soil sphagnum moss tensities on floral Thrips usually v v N N N V V V V V R R R R varieties available vegetative stage vermiculite