MEDITERRANEAN FRUIT FLY IN HAWAII. 



35 



more coffee beans, or of that portion of the cherry that had any commercial value. 

 Counts made of samples of badly infested cherries, and of those in which the infesta- 

 tion had not progressed sufficiently far to affect the weight, were made and the loss 

 both in numbers and percentage of cherries is given in Table IX. 



Table IX. — Loss of weight and pulping quality of coffee cherries due to infestation by 



Mediterranean fruit fly. 1 





Number of cherries. 



Loss due to infes- 

 tation. 



Cherries failing 

 to pulp. 



Cherries partly 

 pulped. 



Weight of sample. 



Badly 

 infested. 



Firm 



bright 

 red. 



In num- 

 ber of 

 cherries. 



In per- 

 centage. 



Badly 

 infested. 



Firm 



bright 



red. 



Badly 

 infested. 



Firm 



bright 



red. 



6 pounds 



3,060 

 3,675 

 1,828 

 1,171 

 3,562 



1,980 

 2,892 

 1,277 

 736 

 2,561 



1,080 

 783 

 551 

 435 



1,001 



54.5 

 27.1 

 43.1 

 59.1 

 39.8 



692 

 833 

 274 





 11 

 3 



334 

 699 

 357 



25 

 227 



4 pounds 



274 























i Attention is called to the fact that differences in the size and sueculency of coffee cherries is responsible 

 for the differences in the number of cherries per pound in the different samples. While several ordinary 

 weighing machines were used in securing data in Tables IX and X, the uninfested and infested cherries 

 or beans of the same sample were weighed on the same machine. 



It will be noted that loss in the number of coffee cherries due to heavy infestation, 

 when the cherry is sold by the pound at prices paid before the advent of the fly, 

 ranged in the particular examples taken from 27.1 to 59.1 per cent. In practice, 

 however, this loss is considerably reduced by the addition of half-ripe fruits in the 

 fields. This loss has been appreciated by the small Japanese coffee growers and 

 has been responsible, in the opinion of the writers, for the erection of many small 

 pulping mills throughout the Kona coffee district. It has also encouraged coffee 

 renters who deliver their crop at the large mills to put in their sacks a high percent- 

 age of "too-green" cherries which will not pulp and are therefore lost. 



Badly infested cherrfes do not pulp as easily as do sound fruits, as shown in the data 

 of Table IX. Thus in 6, 10, and 4 pounds of badly infested cherries, run through a 

 gasoline pulping mill, 692, 833, and 274 failed to pulp, whereas in three samples of 

 the same weight of unaffected cherries, 0, 11, and 3 cherries failed to pulp. The 

 number of badly infested cherries that only partly pulped is also much larger than 

 that of unaffected cherries. 



To determine whether the beans from infested and noninfested cherries differed 

 in weight after they had been dried and sacked for several months the beans of 1,000 

 cherries were weighed separately with the results given in Table X. 



Table X. — Relative weights of thoroughly dried beans from badly infested and uninfested 



coffee cherries. 



Weight of sample of dried beans from 1,000 cherries. 



Lot. 



Infested. 



Not in- 

 fested. 



Ounces. 



11 



11.5 



11 



10 



10 



10 

 9.5 

 9.5 



Lot. 



Infested. 



Ounces. 

 ■ 10 



10.5 



12 



11.5 



11 



12 



12 



Not in- 

 fested. 



Ounces. 

 10 



10.5 

 12 

 11 



11.5 

 12 

 12 



