Spring grain-aphis or so-called "green bug" (Toxoptera graminum Rond.) . ^ carried by theirhosts, and, furthermore, the adult parasites fly with the latter withfavoring winds. During strong winds the Lysiphlebus does not use its Avings, butcraAvls about over the plants and probably does not become scatteredby gales. But in warm, comparatively still Aveather the writer hasobserA-ed both Avinged green bugs and parasites craAvling about onthe AvindoAvs of raihvay coaches many miles aAvay from seriouslyinfested fields of grain. [Cir. 93] Fig. -Dead reen bugs, showing hole from which thematured par
Spring grain-aphis or so-called "green bug" (Toxoptera graminum Rond.) . ^ carried by theirhosts, and, furthermore, the adult parasites fly with the latter withfavoring winds. During strong winds the Lysiphlebus does not use its Avings, butcraAvls about over the plants and probably does not become scatteredby gales. But in warm, comparatively still Aveather the writer hasobserA-ed both Avinged green bugs and parasites craAvling about onthe AvindoAvs of raihvay coaches many miles aAvay from seriouslyinfested fields of grain. [Cir. 93] Fig. -Dead reen bugs, showing hole from which thematured parasite of Lysipli-Ichus tritici emerges. Thetop figure shows the lid stillattached, but pushed back ;the bottom figure shows theparasite emerging. Enlarged.(Original.) 19 EXPERIMENTS IN DESTROYINd (JHKEN lilKiS OVER SMALL AREAS. On leaving Washington both Mr. Ainslie and Mr. Pliillii)s Avoreinstructed to place themselves in the position of a farmer whose grainfields were beginning to show the presence of the * green bug bysmall deadening spots, and to leave nothing undone or untricci thaiwould seem to afford relief and save the crop. Mr. Ainslie instituted some experiments in the use of a brush dragat Summers. Ark., and Mr. Phillips carried out similar experimentsat Hobart, Okla., but in neither case was the measure sufficientlyeffective to warrant its recommendation. Experiments in rollinginfested fields with heav}^ farm rollers Avere conducted by both ofthese agents, but it was invariably fouixd that this measure was onlyeffectiv
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