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1,000 square feet 20 gallons 20 square feet adults were seen August 16 August 24 barium carbonate bluegrass sod webworm Campbell and Stone CONTROL OF SOD controlling sod webworms corn root webworm Crambus mutabilis Crambus teterrellus diﬁerence diluted emulsion eﬁective feet of sod ﬁeld ﬁrst observed ﬁve plots ﬂight of adults gallon of diluted gallon on 20 gallons of kerosene gallons of water grass hard soap I I I I I I I I increase in number injury insecticides July 13 July 24 July 30 June 15 kerosene emulsion killed by kerosene larvae lead arsenate nicotine oleate nitrobenzene number of worms ounce Paris green poisoned bait pound of hard pounds in 20 pounds of lead proportion of worms proportions killed pyrethrins pyrethrum spray rate of 1/2 second ﬂight occurred September square yard standard error water and applied Webworms in Lawns worms killed worms were killed yard of turf