Bericht über verschiedene Baumwollinsekten in Texas . mehr Nearlygrown. Die gesamte Vegetation um die Ränder der Felder wurde daher mit Pariser Grün- oder Grünarsenoid vergiftet. Inthe Gift war mit Mehl gemischt, was es mehr Klebstoff machte. Über die Felder wurden sowohl die gepflügten als auch diejenigen verteilt, auf denen die Häppchen füttern, vergiftete Bran Maschen. 1 Pfund Pariser Grün wird mit 25 Pfund Kleie gemischt. Diese Behandlung war äußerst effektiv. Fünf Tage später, als sie erneut besucht wurden, wurde die Mehrheit der Häppchen tot unter den Unkraut gefunden, die gründlich poi gewesen waren

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Report on miscellaneous cotton insects in Texas . more nearlygrown. All of the vegetation around the edges of the fields wastherefore poisoned with Paris green or green arsenoid. Inthe poison was mixed with flour, whichmade it more adhesive. Over the fields, both those which had been plowed andthose wherein the hoppers were feeding, poisoned bran mash was distributed. 1pound of Paris green being mixed with 25pounds of bran. This treatment provedexceedingly effective. Five days later, when again visited, the greatmajority of the hoppers were found dead among the weeds whichhad been thoroughly poisoned. The (Meet of bran mash is not soapparent, as the hoppers after eating it crawl beneath small clods oiearth and there die, but by examining the ground around a small pileof the mash from 12 to 20 dead hoppers were found, and many morehad doubtless died farther away. To moisten the mash, water is foundas effective as molasses. Around the edges of the fields, and in patchesof weeds on uncultivated land, a spray oi pure kerosene or oi strong. Fig. 11.—Eggma°sof Mdanopl* sentkilis—enlarged authors illus-tration i. 22 MISCELLANEOUS COTTON INSECTS. kerosene emulsion was used with marked success. The planters pre-ferred using- the pure oil, its effect being more quickly apparent.Paris green was used both as a dust and as a spray. The dust seemedto be much the better form of application and more effective, althoughmore material is required. Several types of portable powder gunswere used by various planters under our direction, and were found toapply the poison much more effectively and economically than is doneby the use of a sack. Where these methods were thoroughly practiced, the young hoppers were much reduced in numbers by the third weekin April and their injury checked. An unfortunate feature of thesemethods of treatment lay in the fact that, after a field had been almostentirely rid of the pest, migration would take place from adjoininguncultivated land, possibly owned

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• bookcentury1900
• bookdecade1900
• bookidreportonmisc
• bookyear1906