96 



DECIDUOUS FRUIT INSECTS AXD INSECTICIDES. 



95.59, with a total for all trees of 92.91, as against a total of 87.05 

 per cent free from this insect in Plat III, the one-spray plat, a differ- 

 ence in favor of Plat I of 5.86 per cent. The range for individual 

 trees in Plat III was 83.02 to 92.38. Plat V, the unsprayed plat, 

 shows a total percentage of 52.73 of fruit free from the codling moth, 

 the range being from 44.81 to 59.16. There is thus a gain over the 

 unsprayed fruit in sound fruit by the demonstration treatment of 

 40.18 per cent and by the one-spray method a gain of 34.32 per 

 cent of sound fruit. (See PL IT, figs* 1, 2, 3.) 



Plat II, which received the home-boiled lime-sulphur demonstra- 

 tion treatment, shows a total percentage of fruit free from injury of 

 96.30, and Plat TV, the Bordeaux demonstration plat, shows 95.62 

 per cent of fruit free from injury. 



In Table YIII are shown the places of entrance of the fruit for 

 each tree of each plat for the total larvae throughout the season. 



Table VIII. — Places of entrance of fruit by total larvse of the codling moth for each tree 



of each plat. Fennville, Mich ., 1911. 



PLAT I. COMMERCIAL LIME-SULPHUR DEMONSTRATION. 



Total number of larvae and place of entrance of fruit for each 

 and. second broods combined. 



tree; first 



Total for 

 plat. 



Percentage 



of larvse ! Total 

 entering at number 



Place of entrance. 



Tree 3. Tree 4. 



Tree 5. 



calyx, side, 

 and stem. 



of larvse. 



First and second broods: 



Calvx 



12 



164 



2 



21 



64 



3 



8 

 26 

 1 



41 



254 



6 



13.62 



S4.39 



1.99 





Side 





Stem 













Total 



17S 



SS 



35 



301 



100.00 



301 



PLAT II. HOME-BOILED LIME-SULPHUR DEMONSTRATION. 



Eirst and second brood: 



Calyx 



Side 



Stem 



Total. 



102 

 2 



88 



104 



1 



19 



2S5 



111 



309 



6.15 

 92.23 

 1.62 



100.00 



309 



PLAT III. ONE-SPRAY METHOD. 



Eirst and second broods: 

 Calvx 



4 

 65 

 4 



54 

 661 



24 



153 

 5 



65 



879 



33 



6.65 



89.97 



3.38 





Side 





Stem 









Total 



73 



739 



165 



977 



100.00 



977 



PLAT TV. BORDEAUX-MIXTURE DEMONSTRATION, 



Eirst and second broods: 

 Calvx 



3 

 8 



1 



47 



109 



5 



5 



19 

 2 



55 



136 



8 



27*. 64 

 6S.34 

 4.02 





Side 







Stem 











Total 



12 



161 



26 



199 



100.00 



199 







