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23 > Image 23 of Kentucky farm and home science, special report 1, July 1955

Part of Kentucky Agricultural Experiment Station

The first fruits were harvested _]uly 2 and another N D f harvest was made july 6. Yield of these two harvests ` Q 0 from the plots receiving the full treatment averaged 1326 pounds per acre. The fruits averaged ounces , each and 85 percent were marketable. ln contrast, V { only 136 pounds averaging about 2 ounces each were harvested on these same dates from the plots treated . ' only with parathion and manzate, and few of these A were marketable. However, the total yield (early plus ` tp later harvests) from the plants given the full treatment did not differ significantly from the yield of plants A Q By \\'. D. Armstrong, Department of Horticulture [mated Only wlfll Pal`*llhlO and lllflmllll`- Treatments in the field and in the greenhouses at _ Lexington have given about the same results, but the [ A new disease Oi appies llas been iniind in be ennsing tests in y northern Kentucky demonstrated they impor- _ * seiiens dennnge in snnie Kenineksi nppie pinniings as tance ol having the chemicals together in solution and _ well as in lndiana, Illinois, and other nearby states. *llPll(l as fl `llOl Plfllll 5Pl`?l) llll lll <`llll`?ll$ The organism (BOf)`;\().S`/)f1llC)`f(1 rifzis) causing this dis- 'l?l` illlllllell Sl*ll`?llll` Ollc llollowlllg lllc Olllcll lllc ,,- ease, known as (-in-i-iini Cane biigini has ii wide range ellects were not so pronounced as when they were of hosts and causes a characteristic bark canker and a llllX(l lOgllll` " soft type of fruit 1`OL. ln Kentucky, bark damage and i limb and twig killing have been most severe on Rome, #"'*Y"% r Paducah, and Golden Delicious varieties, and fruit l rotting has been serious on Golden Delicious. Red if Delicious, Rome, Paducah, and others in few orchards. I " This trouble has been noticed only recently but has _ spread rapidly within plantings. It is thought that the after-effects ol the severe winter of 1950-51 and of the ep severe drouths of the past three years have made the trees more susceptible to the canker phase of the dis- sg ease. Little is known so far about control of the canker J Plllls lllll l`lll)lllll and llllcb seem l0 be llellllilll lll I>y_]an1es Herron, Department of lintomology and Botany i curbing the rotting of the fruit. s` Studies of this disease are being made in several llll@l'$ll`ll $l?ll$ Nimblewill (Mizlileiibergia sclrre/veri) is a hne-stem- med perennial grass troublesome on lawns. 'l`ests were h "_'A_"T begun last year to control this pest in mixed bluegrass I and nimblewill turf. Several materials, at different { rates of application, were applied as sprays at the end . of May, lune, _|uly, and .\ugust. Materials used were potassium cyanate. maleic hydrazide, 'l`(1.\ sodium salt, alanap, sodium chlorate, and premerge. ln November, at least 80 percent of the top growth ~; of nimblewill was killed on plots treated with either . maleic hydra/ide at rates of 40 or 60 ounces per l000 fi square feet, or 'l`(1,<\ sodium salt at the rate of I0 ) (il)(lC SlllglClill`l', l)Cl')2lll\llCIl[ of H()lll(.lll[lllC ()llll('CS Pcli S(Ill2ll`C ficcl. lf()I) iJ'l`()\\'lfl Oli l)lll(`gl`iIN5 i had been injured, but was recovering. ()n plots treated with the other materials in May. |une, and _|uly, both _, ln an attempt to induce earlier yields, tomatoes the bluegrass and the nimblewill were injured, but being grown in northern Kentucky for early market both were recovering. A were treated with a spray composed of boron, corn (Lrass on plots treated .#\ugust Fil with potassium . sugar, and a fruitsetting hormone in combination with cyauate, maleic hydrazide, and 'l`(I.\ was severely in- the insecticide parathion and the fungicide manxate. iured and had not recovered by November I2. ()n the "freatment was applied on May 20 and May 25. 1951, plots treated .\ugust 31 with premerge or with sodium I with a knapsack sprayer. (jheck plots were sprayed chlorate there was no evident injury to either the .r} with parathion and man/ate only. bluegrass or the nimblewill. ` 3 AGRICULTURAL EXP}:LBlM};ZNI` SrAT1oN 23