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

Part of Kentucky Agricultural Experiment Station

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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. *ll’Pll€(l as fl “`llOl€ Plfllll 5Pl`?l)’· “ll€ll lll€ <`ll€l“l¢`?ll$ • The organism (BOf)`;\‘().S`/)f1llC)`f(1 rifzis) causing this dis- “'l?l`€ illlllllell S€l’*ll`?ll€ll`» 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 lOg€lll€l`· " 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`l”ll)ll’lll 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“'€$l€l`ll $l?ll€$· Nimblewill (Mizlileiibergia sclrre/veri) is a hne-stem- med perennial grass troublesome on lawns. 'l`ests were ‘ h ”"_'Aé_"—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 fruit—setting 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` S’rAT1oN 23