I 1 . 



BULLETIN 88, U. S. DEPARTMENT OF AGRICULTURE. 



calyx lobes remain open, so that the spray may be successfully 

 directed into the calyx cups. In New Mexico, however, it would 

 appear that the calyx lobes of the little apples do not draw together 

 nearly so quickly after the falling of the petals and may remain 

 open in suitable condition for calyx spraying for a period of from two 

 to three weeks, varying somewhat with the variety and season. 

 (Figs. 3 and 4.) 



This condition renders it possible to apply the second spray in a 

 way to supplement the first spray into the calyx cups. 



Fig. 4.— Showing condition of calyx. lobes of Ben Davis apple: a, 18 days after falling of petals; 6, 30 

 days after falling of petals. (Original.) 



The effect of spraying in changing the relative proportion of larvae 

 which succeed in entering the fruit at the calyx, side, and stem is 

 shown for Plats I to III in Table III. The normal behavior of the 

 larvae in entering the fruit may be seen by referring to the figures for 

 Plat IV of this table. It will be noted that on the unsprayed plat 

 somewhat over one-half (53.72 per cent) of the total larvae for the 

 season entered the fruit at the calyx end. 



Table III. — Number and percentage of codling moth larvse entering fruit at calyx, side, 

 ~and stem for Plats I- IV, Sherman & Johnson orchard, Roswell, N. Mex., 1913. 



Total larva; for plat for season en- 

 tering at — 



Plal 



I. 



Per cent. 



Plat 



11. 



Per cent. 



riat 



III. 



Per cent. 



Plat 

 IV. 



Per cent. 





19 



789 

 10 



2.31 



96.45 



1.24 



17 

 249 



5 



6.27 



91.88 



1.85 



10 



128 



10 



6.76 

 86.48 

 6.76 



12,663 

 9,622 

 1,285 



53. 72 



Side 



40.82 



Stem 



5.46 







Total 



818 



100. 00 



271 



100.00 



148 



ioo. oo 



23, 570 



100. 00 







