748 



Journal of Agriculture, Victoria. [lo Dec, 191 2. 



the plants, but no disease was found in the tubers of the sprayed and 

 unsprayed sections. It is very probable that the dry weather at the 

 end of January and beginning of February checked the disease. That 

 the dry weather had a marked influence on the crop is borne out by 

 the yields obtained on sections 4 and 5 of plot 3, marked thus *, 

 which were planted three weeks later than the sections 1, 2, and 3, 

 consequently the results of sections 4 and 5 must be considered sepa- 

 rately. In this case the sprayed section shows an increase of 7 per 

 cent. 



Yields. 



The returns from plots 1, 3, and 4 show a marked decrease in the 

 yield on the sprayed sections compared with the unsprayed, ranging 

 from 7 per cent, to 16 per cent. The only increase is in plot No. 2, and 

 the late planted portion of No. 3. This decrease is consistent through- 

 out, and is greater in proportion to the number of sprayings. 



Table IV. 

 AVERAGES OF SPRAYED AND UNSPRAYED SECTIONS. 



From the above it will be seen that in one case spraying increased the yield ; in 

 the other there is an apparent decrease. 



SPRAYING EXPERIMENTS, 1911-12. 

 Plan of Mr. Crowe's Plot at Crossley. 



133 links. 



Sprayed three (3) 

 times 



50 links. 



Uns]irayed 



133 links. 



Sprayed twice 



50 links. 



[Tnspi'ayed 



133 links. 



■>prayed once 



Public road. 



SPRAYING EXPERIMENTS, 1911-12. 

 Plan of Plot at Messrs. Callaghan Bros., Wollaston, Warrnambool. 



