FRUITS OF THE MYRTLE FAMILY 279 



the usual means, i.e., spraying with kerosene emulsion or some 

 other insecticide, but little attention is given to this matter in 

 most tropical countries. The fruit-flies, including species of 

 Anastrepha, Ceratitis, and Dacus, cause serious trouble in 

 many regions. It is said that 80 per cent of the guavas pro- 

 duced in Hawaii have in some seasons been infested with the 

 larvse of the Mediterranean fruit-fly (Ceratitis capitata Wied.). 

 The guava fruit-rot, a species of Glomerella, is a common 

 fungous disease in some places. There are other pests, some 

 of them serious, which the guava-grower may have to 

 combat. 



Within the species there evidently exist more or less well- 

 defined races, each of which includes many seedling variations. 

 Of true horticultural varieties, propagated by cutting or graft- 

 ing, there are as yet practically none. The so-called varieties 

 listed in different regions are presumably seedling races. Indian 

 nurserymen distinguish a number of forms, such as "smooth 

 green," "red-fleshed," Karalia, Mirzapuri, and Allahabad. In 

 the United States, seedlings are offered of the Allahabad guava, 

 and of forms termed Brazilian, Peruvian, lemon, pear, smooth 

 green, snow-white, sour, Perico, and Guinea. The number of 

 such forms which could be listed is considerable. The Guinea 

 variety, a white-fleshed, sweet-fruited guava with few seeds, has 

 been propagated in California by budding, but it has not been 

 planted extensively. 



THE STRAWBERRY GUAVA (Fig. 36) 

 (Psidium Cattleianum, Sabine) 



Unlike the preceding species, the strawberry guava is sub- 

 tropical in its requirements, and can be grown wherever the 

 orange succeeds. It is ornamental in appearance, and for this 

 reason has become a favorite garden-shrub in many regions. 

 Though somewhat less valuable than the tropical guava for 



