Apple rust . II.—Summary of rust control on York Imperial apple fruitssprayed on successive dates. Total fruits Healthy Number Percent Number Percent AverageNumber number of trees fruits per tree Check Lime-sulphur ... Bordeaux Atomic sulphur 18622 | 13435 147282195617096 5602 10970 8962 5187 8 9128 6 10986 8 8134 6 2328245527442849 [Aug., .1915; Apple Rust 57 Each of the spray materials gave a very pronouncedreduction in the percent of rusted fruit, but the lime-sulphurshows up particularly well. Turning from the trees which received several successivea
Apple rust . II.—Summary of rust control on York Imperial apple fruitssprayed on successive dates. Total fruits Healthy Number Percent Number Percent AverageNumber number of trees fruits per tree Check Lime-sulphur ... Bordeaux Atomic sulphur 18622 | 13435 147282195617096 5602 10970 8962 5187 8 9128 6 10986 8 8134 6 2328245527442849 [Aug., .1915; Apple Rust 57 Each of the spray materials gave a very pronouncedreduction in the percent of rusted fruit, but the lime-sulphurshows up particularly well. Turning from the trees which received several successiveapplications of spray, we will take up those which weresprayed but once. The dates and materials used in this partof the work are indicated below. Table XVIII.—Spray schedule for single ap-plication in 1914. Number of trees sprayed Bordeaux Lime-sulphur Atomic sulphur April 28April 29May 1May 2May 4May 5May 6May 7May 8May 9May 11May 12May 13May 14May 15May 18May 19May 20May 21May 22May 23May 25May 26May 28. 58 W. Va. Agrl. Experiment Station [Bul. 154] Check twigs were retained on each of the trees there was no important rust infection after May 5th,counts were made only on trees sprayed previous to that XIX shows the effectiveness of the treatments. Table XIX.—Rust control on York Imperial apple foliage as a resultof single spray applications in 191/. Leaves on Sprayed Twigs Tree Date Total * number Rusted Healthy number Number Percent Number Percent 43 44 45 242 204 191 219 249 221 4 5 7 April 28April 28April 28April 29 May-May 1May 1May 2May 2May 4May 4May 4 Lime-sulphur ...Atomic sulphur Bordeaux Lime-sulphur ...Lime-sulphur ... Bordeaux Atomic sulphurLime-sulphur ... Bordeaux Lime-sulphur ...Atomic sulphurBordeaux 215306251273289260232312222334279348 183 229 151 156 174 144 166 145 93 88 132 63 347710011811510666167132246147285 Leaves ox Checked Twig
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Keywords: ., bookcentury1900, bookdecade1910, bookidapplerust154, bookyear1915
