520 MacCauGHEY: GUAVAS OF HAWAIIAN ISLANDS 
vatiety of plants in Hawaii—banyan, fig, avocado, citrus fruits, 
and others—is exceedingly pestiferous on the guava in many 
districts. It coats the foliage and young branches with an ugly 
black incrustation and is obviously an inhibiting factor in photo- 
synthesis, transpiration, and respiration.* 
The guava fruit-rot is. caused by Ghoeserclia Psidii (G. Del.) 
Sheldon, and is more or less common in the West Indies, Florida, 
and California. This fungus is closely related to the most destruc- 
tive apple disease in the United States, namely the bitter-rot 
(G. rufomaculans [Berk.] Spaulding & Van Sch.).t The guava 
fruit-rot first appears as brown decaying spots here and there on 
the rind. These diseased areas are finally covered with masses 
of salmon-pink spores. As the fungus continues its activity within 
the fruit, the latter gradually rots, and becomes wrinkled and 
shrunken. This disease is not prevalent in Hawaii. 
2. THE SWEET RED Guava 
This is a variety of the common yellow guava and has the 
general characters of the latter. It requires a more humid habitat 
and is characteristic of the upper valleys, ravines, and higher 
levels. The flesh is deep pink, and is firm and sweet. This form 
may be the classical “‘ pomiferum”’ variety. 
3. THE WuitE Lemon Guava 
This is a cultivated variety of P. Guajava, and occurs in a 
number of the island gardens. The shrub usually grows more 
erect and arborescent in habit than do the others in this group. 
The fruit is pyriform (the “ pyriferum’”’ variety of the literature), 
and often is three inches in length. The skin is rough and greenish 
white or yellowish in color. The flesh is white, and quite sweet 
in flavor, with a delicate aroma. This is a choice fruit for eating 
out of hand, or for serving sliced on the table. 
4. THE ae GUAVA 
The so-called ‘white guava” was introduced into, the islands 
at a very early date and is now abundant. It often occurs far 
See Webber, H. J. Sooty mold of the orange and its treatment, U. S. Dept. 
rua Div. Phys. & Path. Bull. 13: I-34. pl. 1 
alsted, B. D. Laboratory studies of fruit decays. N. J. oe Expt. 
Sta. Rept. 1892, 326-330. 
