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_ __ lery _ _1 __ lery little __ little ___n 100 square yards 14 tobacco ﬁelds 30 beetles caged abundant Arctium lappa average number beetle counts beetles developed beetles emerging Black nightshade Burdock Cocklebur Cowpea Eggplant _ _ ﬁgure ﬁrst Flea Beetle ﬂea beetle feeding ﬂea beetle populations Giant ragweed Groundcherry P_ heterophylla groundcherry Physalis heterophylla horsenettle host plants I_ _ infestation insect Ipomoea Jimsonweed _ June June__ larvae little 0 30 naceous plants nettle nightshade cherry nightshade _ number of beetles Pepper _ _ Pittsylvania County plants per 100 plants_ pruinosa rearing experiments Sheep-sorrel Snap or garden Solanaceae solanaceous plants solanaceous weeds Solanum carolinense Solanum nigrum Solanum tuberosum spp_ throughout the season tobacco ﬂea beetle tobacco plant beds Turnip Turnip Brassica rapa weed counts weekly intervals Wild potato-line _