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Image 4 of Kentucky fruit notes, vol. 2, No. 10, February 1945

Part of Kentucky Agricultural Experiment Station

i ` their productivity so long and usual- C()l)l_,lN(} MOTH IN 1944 laéaaeed replacing every five or six P. O. hrrciihh ‘ lh"additioh to also hart ot the The worst codling moth in years, .l. decrease in two or three of the years that s ttm “'“Y most .“`“st°"“ KC“` t ii , oah he attributed to a rleoitlori rlo_ tucky, southern Illinois, and Indiana "v Heiency in the amount of rainfall. *‘m°l" g""‘““`s sum Vp th" mst Raspberries are shallow rooted ahrl season. By almost continuous spray- ._ C are seriously alfected if ample mt-”¥» Cvch attt‘t` thc usual 5PmY Zhi. moisture is hot available. The ma_ schedule was completed, some grow- ·lp_ hure mulch is hot ohly helhtul ih ers came through with very clean B22 supplying hutriehts hut aids ih the crops. Others who were less for- t tig retention of moisture as well as to ttmstc OF Stvpecd spraying tw stmh l help maihtaih a lower soil tem_ lost their entire crop. In eastern t_ herature that is so heheheial to Kentucky, inthe hill country where liu rashherries codling moth has never been much U Pruning or Cane Thinning; Dm-- of a problem, commercial growerr Sth ‘ ihg the years ot 1938 ahd 1939 areas came through with another fine it;] were selected in each of the rows CVOP Of high Quality {Wit- _ · lil to test the effect Ot Cahe thlhhlhg _The season of 1944 started with a . on yields. Fifty-foot strips were big €€{1`1`Y·0\'€21` of W01`mS_ and ih01`¤‘ tit. Selected ih tvhlch the row was hai-_ was little winter mortality. Warm Cm l-owed to tltteeh lht-hes ahcl he weather the latter half ot May was f oahes were removed Th other oom_ ideal for codling moth, causing them ' parable fifty-foot lengths, the rows tv €m€I`g€ ih UhPi`€€€’(t€ht€d hhhh » sitl were narrowed to fifteen inches and bers Over 3 short psrmd Of tm“`· ‘ lm the canes in the row thinned so that DQ? tt) _th€ h0t» dry “'Cs*thCt` P"°‘ DT there remaihed ohly ten oahes tor vailing into September, the heavy he Each four feet Ot rah-_ The yields first brood attack was followed _1n L at uhder these tests are giveh lh July and August by still heavier __ '. Table lT_ The tivo year average second and third-broods. Growers - mt shows 245 crates where the canes C€’uld see more and more “'O"‘“s ei} were thinned out in the row and hlttmg the apples ‘~?"€*`Y (MY almost . lh 310 crates per acre where no thin- up to hsl"€st_ tt`m€» long sttst tho ar - ning was done. In every case, there ¤<>rm¤1 sprsymg season was OVC"· was a sighitioahtly higher average and many continued to spray. Where ug yield where no canes were removed lcsd stscnsts ptogwms WCW uscd ot from the mw. it should be men- the dry wsathw Ssemstl t0 1`<*d¤.¤<· tioned in this connection that during the t<>>¤¢¤ty Of the ¤¤‘S€¤¤¤¤1 d<-=r><2S¤tS · ,,, these two years the moisture supply €m,d ther? was mm? OY less tOhGg“` Sl, was plentiful and the yields from “?Jut`Y· Ftxed m°°t.m0.and .summ°" lll all plots were exceptionally hlgh_ oil were more eilective, it more Tl expensive, but supplies were scarce i Ol Table II by the middle of the sason. H lgggqggg Yields The Kentuclhy Spray Service, co- _ ra - · operating wit spray services in RaSpbcrry_Clm€ Thmnmg TcSt"`In neighboring states was on the job 24 Fmt Crates Per Acre again in 1944 and warned Kentucky li. I "r*W·——" V ·"m··* VAN HTM growers of the serious codling moth it Ave. of attack in prospect. It is felt that l938& these warnings were especially 1938 1939 1939 vall/uablle this season. h b lg _`"—_"_*`_-_" WT '''' " uc time an thoug t will c Catlgélsuggtalincd 240 251 245 spent this winter, wherever apple Camas Not men get together, on what to do (Un runaai aio soo aio about codling moth; and there will p ‘’‘‘‘‘'‘‘‘ be a great deal of interest in im- """""T`TA‘""""'4""`"T""'" ' proved spray schedules and new y l) It is seen from Table II that severe materials such as DDT. Many will t ‘_' cane thinning sharply reduces the spend more time this winter on ? s yield. On the other hand, where scraping trees, screening packing “ all canes are left the berries are sheds, and other sanitary measures. F smaller and a severe strain on the There is one ray of hope, at any < U plants results. A practice in be- rate—1945 certainly cannot be any Q t tween these two extremes would worse than 1944. Too, we are over- g Q likely give the best long-time re- due for a season when the weather _% ; sults. is unfavorable for codling moth. · 4 1