OCR Text |
Show METHODS OF SPRAYING TREES Maine Experimental Station Findi Combination Which May Be Used With Perfect Safety. In response to numerous requesti for information on the subject of pre paring and use of lime-sulphur in or chard spraying, the Maine agricul tural experiment station has issued bulletin which goes into the mattei quite fully. It says in part: During the past few years there hai been a marked change in the methodi of spraying apple trees, the most Important Im-portant being a quite general substi-tutlon substi-tutlon of lime-sulphur for bordeaui mixture as a fungicide. There is prob ably no better material than bordeaui mixture in use today for the control of apple scab, but unfortunately it is frequently the cause of serious damage dam-age to both foliage and fruit if the weather conditions are right. The cir cular gives a list of a large numbei of varieties of apples with the relative resistance of each to this spray. It is not recommended that orchardista who have been using bordeaux mix ture successfully on resistant varieties change to lime-sulphur. On the other hand, those who have experienced any difficulty with It, or who are growing varieties known to be susceptible ta i ' ' -' M, f' va mw; If J p- IS !,!. - 4 " : f. ? i$ 4 Sifting Lime Wash to Prevent Clogging Clog-ging Nozzle. this spray, or who are uncertain whether or not bordeaux mixture may be safely used on the varieties they have, are strongly advised to use lime uilphur. This station has found that this latter in combination with arsenate arsen-ate of lead may be used with perfect safety on the Ben Davis and Baldwin apple trees, while bordeaux mixture applied at the same time and in the same manner resulted in injury to foliage foli-age or fruit or both. For the small grower or the man with but few trees it is doubtleoo more satisfactory to purchase one of the standard brands of commercial lime sulphur concentrates, but for one with an orchard of any size it is entirely en-tirely another matter. He should purchase pur-chase the raw materials and prepare the concentrate at home. The circular circu-lar in question gives detailed instructions instruc-tions how to prepare home-cooked time-sulphur, how to test this with the hydrometer to determine its density dens-ity and gives tables for dilution of different dif-ferent densities for dormant sprays and for summer spraying. This latter Information is also valuable to the man who purchases one of the commercial com-mercial brands of lime-sulphur. The density of this also should be determined deter-mined in the same manner and diluted according to the tables. |