252 REPORT OF THE DEPARTMENT OF BOTANY OF THE 
Bugs were numerous and persistent in spite of the frequent use 
of paris green. However, the unsprayed rows which received only 
two applications of paris green were but little if any more injured 
than the sprayed rows of Series I to which paris green was applied 
five times. We believe this to be due to the fact that the first treat- 
ment of the unsprayed rows was made at exactly the right time 
to get the best results. 
There was some early blight, but no late blight. Flea beetles 
were plentiful and caused much damage. By August 10 there was 
a striking contrast in appearance between sprayed and unsprayed 
‘rows. Series II had twice as much green foliage as Series III. 
‘The larger yield of the sprayed rows in this experiment is to be 
attributed to their partial protection against the ravages of flea 
beetles and early blight. 
The potatoes were dug by hand October 7. The product of each 
row was carefully sorted into two grades — marketable tubers and 
culls ——and weighed separately. No. rotten tubers were found. 
The yields were as follows: 
TABLE XIII.— YIELDS IN THE EXPERIMENT AT RIVERHEAD IN 1907. 
ee ee ee ee 
{ 




| | YIELD PER ROW.T YIELD PER ACRE. 
Row. | TREATMENT. | ———_ 
| Marketable. | Culls. | Marketable. Culls. 
/ Lbs. Lbs. Bu. les. a Ba 9S TGs. 
Ise SF AOprayved ostimes'. pe raae oe 227 ivé 189 10 |: 14 10 
2 ET Sol. aOOLTSVed. Ol LIES Y > cis de «5 cakeeds 243 21 202 S0ASZ 30 
eke al Do ASPTAVE Wi cere eee eee ee 216 22% | 180 — / 18 45 
Aa | (OPEAV Ed GO CIMIeS <1. car eenONr ean 216 264 | 180 — | 22 5 
Os asia HO PLA VOC. ORbIdeS o.oo eae te eae 235 25 195 50. | 20 50 
6.23. | AGnspraved se eae bee 211 254 | 175 50 | 21 15 
hee oe SDLAVeUio CIES. 1 etal oe ae 240 PA! 200 — |17 30 
Si. .\! Sorayed G times: (iit, os wees 236 22 196 40 | 18 20 
Ose MUNSPLA Vera. ketene Cos BOE 178 24 148 20 | 20 —- 
TOR -F 7 SptayediS. times teem eis kes 2114 21 176 sa yes 30 
LE ke ae) OPLAyed OTItNes, - am caw kaka 231 25 192 30 | 20 50 
ee UMS PPA VEOer tale ok hie Sa ea One 207 25 172 30 | 20 50 
137 cs MUD DLAVed 3 LIMES fe ee tem ae 226 334 | 188 201 20, 55 
h4-3>,) “prayed uGctimes.. ae fev. «de ee 2554 234 | 212 5b y|) 9 35 
Loe tO IS DIA VOCE, ieee ae fe ce een 201 23 167 30 | 19 10 
| 

tT Rows 290.4 teet long by 3 feet wide making the area of each row exactly one-fiftieth acre’ 
TABLte XIV.— YIELD BY SERIES AT RIVERHEAD IN 1907. 
Se eee 



SERIES. Rows. Dates of spraying. Yield per acre.t 
Bu. lbs, 
ao. che ate 1, 4, (4; 10'and 18°) June 19° Jaly 25 and Aucust 15... oo ee 186 45 
LE Fe ie 2,5,8, lland 14.| June 19, July 2, 17, 31, August 15 and 29....| 200 ta) 
CTT eee 5,6, 9, t2-and loo Not spraved.n oe ee ne sree ee 168 50 

+t Marketable tubers only. 
