. Insect pests of farm, garden and orchard . h preferable on account of itssuperior adhesiveness. Where Bordeaux mixture is used, arseniteof lime, or arsenite of lime made with soda, may be used, but thesehomemade arsenicals should not be used alone, on account oftheir burning the foliage. The vines should be sprayed first when they are a few incheshigh, and the spraying repeated once or twice at intervals of ten 296 INSECT PESTS OF FARM, GARDEN AND ORCHARD days or two weeks. The larvcc are so easily killed by arsenicalsthat potato growers no longer fear their work, but large quantitiesof Pari
. Insect pests of farm, garden and orchard . h preferable on account of itssuperior adhesiveness. Where Bordeaux mixture is used, arseniteof lime, or arsenite of lime made with soda, may be used, but thesehomemade arsenicals should not be used alone, on account oftheir burning the foliage. The vines should be sprayed first when they are a few incheshigh, and the spraying repeated once or twice at intervals of ten 296 INSECT PESTS OF FARM, GARDEN AND ORCHARD days or two weeks. The larvcc are so easily killed by arsenicalsthat potato growers no longer fear their work, but large quantitiesof Paris green are wasted by careless application, and by dustingunduly large amounts wnth poor apparatus, which not infrequentlyresults in burning the foHage. For small areas a bucket or knap-sack pump will be found satisfactory, but for over an acre a barrelpump with a row attachment will prove more economical, and forover ten acres a geared machine spraying several rows at once willbe needed. Cleaning up the vines and plowing potato land in the. Fig. 216.—The convergent ladybird {Hippodamia convergens): a, Sidn\t;b,pupa; c, larva; enlarged. (After Chittenden U. S. Dept. Agr.) fall after the crop has been harvested will aid in reducing the num-bers of the hibernating beetles. Flea-beetles * While the potatoes and tomatoes are but a few inches high theyare often attacked by myriads of small black beetles, which fromtheir power of making long quick jumps are known as soon riddle the foliage, often so badly that the plants wilt, andreplanting is necessary, particularly with tomatoes. Several species are known to attack the potato, the two mostcommon being the potato or cucumber flea-beetle {Epitrix cucum-eris Harris) and one which Professor H. A. Garman has styled theSouthern Potato Flea-beetle {Epitrix fuscula). The Tobacco Flea^ * Family ChrysomeUdoe.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915
