gave the highest root yields. Thus, there Is an Inverse relationship between foliage and storage root production.
However, excessive top growth may result in low root yield. There was a tendency for low-yielding varieties to have
a higher percentage of dry matter in their storage roots, compared to high-yielding varieties.
 The 1991 and 1992 trials suggest that varieties from USDA-TARS are wel-adapted for sweet potato production
in the Virgin Islands in terms of yield and sweet potato weevil tolerance.
 Table 22. Biomass production of sweet potato varieties grown during
 spring-fall, 1992, at UVI-AES.
 Biomass Production (t ha')
 Variety Fresh Dry
 SKB-4 49.3 a 12.1 a
 SKB-2 45.5 a 11.3 a
 Viola 41.6 a 11.6 a
 CS-2 40.9 a 11.5 a
 Sunny 39.7 a 9.9 a
 Peari 37.8 a 10.6 a
 Tapato 36.3 a 9.1 a
 Black Rock 20.9 b 5.3 b
 Trompo Negro 20.2 b 5.3 b
 'Means within a column followed by the same letter are not significantly
 different by Duncan's Multiple Range Test, (P=0.05).

Summary

 This series of trials provided useful research informationon the field performance of sweet potato varieties. One
important observation was the reaction of sweet potato varieties to weevil Infestation. A variety may produce high
total yields, but it can also be highly susceptible to weevil damage. A high percentage of weevil damage significantly
reduces marketable yield.
 In terms of total yield, promising sweet potato varieties for the Virgin Islands include Santo Domingo, Station
Vine. Antigua, Twelve Prime, Agatea, Amarista, Colorette, Miguela, Peria, Viola, Tapato, Sunny, SKB-2, CS-2,
Picadito and SKB-4.
 In terms of marketable yield, the promising varieties are King Crown. EAS 12, EAS 15, Margarita, St. George,
Amarista. Bonaro. Colorette, Dune. EAS 11, Peria, Viola, Tapato. Sunny, Eda, SKB-2 and SKB-4.


VIULA


Viola, a high-yielding sweet potato
cultivar with good culinary qualities.