TuJi COMKOi OJ^' CoULIXi-AIoTli IX pEAllvS IX SoUTH At'KlCA. iTU 



Table 11 . — Fower iJiistinfj versus Liquid Spraying, Codling-moth 



Fusicladiu m Control. 



and 



Note. — Plot 1 (dust) liad iwo api)lieatiuns ot* 12 lb. deliydrated 

 copper-sulphate ])o\v(ler, j)lus S8 lb. lime, before blossoiniuo'^ 10 lb. 

 of deliydrated coiJiiiM'-sulpbatf, ])lus 75 lb. lime, jdus I o lb. lead- 

 ar.seiiate ])owder, for the first two codliii'^' upplical ions, and thre(> 

 biter codlinf^- ayiplications of S.") II). lime, ])lus 15 lb. lead-aisrnalc 

 |)o\\(ier. 



Plot 2 (dust) had t \\() a ppl ictit ions of veTv tine snlplmr before 

 blossouiing", 85 lb. sul]tliur, phis 15 lb. letid-arseiiale powder, For the 

 first two eodlinj^' ai)plieatioiis, and three later codliny- ;i |)pl icnt ions 

 of (S5 lb. linit', plus 15 lb. Icad-tuseiiate. 



Plot 2 (litiuid) hud two foliag'e sprays of ('apex lime-sulphur 

 diluted 1:45 before blossom in ji', lA lb. lead-arseuate powder in 50 

 "^■albjns Capex lime-sulphur, diluted 1:50, for the first two codlinj.;- 

 sprays, and three later, consisting' of Ij lb. letul-arsenate powder in 

 40 gallons Avater. 



Plot 3 (liquid), 1921-22, had two apjdieatious oF bordeaux 

 (4:4:50) before blossoming, 1| lb. lead-arsentite ])owder in 40 gallous 

 bordeaux (4:4:40) for first tw^o codling sprays, and three later sprays 

 of 1} lb. lead-arsenate ])owder in 40 gallons water. 



Plot o (liquid), 1019-20, had two applications of bordeaux 

 (4:4:50) before blossoming, 2^ lb. lead-arsenate paste in 50 gallons 

 bordeaux (4:4:50) for first two codling applications, and three later 

 si)r;iys of 2^. lb. lead-arsenate paste in 50 gallons water. • 



Conclusions. 



I'he I'ilsenburg dusting experiments were efFected under favour- 

 able weather conditions, early in the morning, often Avith dew on 

 the foliage and fruit, when there was no wind, and no rain for at 



"The comparatively severe iufestation of codling in the 1919-20 fruit season was 

 probably due to an abnormally small crop of fruit in the orchard as a wliule, and to a large- 

 source of infestation from the dusted trees. 



