Table 20. Foliage yield of sweet potato varieties grown during spring-
 fall, 1992, at UVI-AES.

 Fresh matter1 Dry matter' Dry matter'
 Variety (t ha-') (%) (t ha')

 SKB-4 34.3 a 19.0 b 6.6 a
 CS-2 28.1 a 21.1 ab 6.0 a
 SKB-2 27.2 a 19.5 b 5.3 a
 Sunny 16.9 b 19.3 b 3.2 b
 Viola 14.8 b 18.8 b 2.7 b
 Black Rock 14.4 b 20.0 ab 2.8 b
 Tapato 13.4 b 20.0 ab 2.6 b
 Trompo Negro 12.2 b 17.8 b 2.2 b
 Peria 9.2 b 23.2 a 2.1 b

 'Means within a column followed by the same letterare not significantly
 different by Duncan's Multiple Range Test, (P=0.05)


 Varieties from USDA-TARS (Perisa, Viola, Tapato and Sunny) produced the highest total and marketable yields
 (Table 21). These are similar to the results obtained from the 1991 trial. Peria, Viola, Tapato and Sunny produced
 higher total and marketable yields than all other varieties. Trompo Negro and Black Rock produced the lowest total
 and marketable yields.
 The highest-yielding varieties displayed weevil damage equivalent to2.0 t ha', with the exception of Tapato (0.4
 t ha'). Tapato had the largest tuber with average weight of 446 g (Table 21). In Puerto Rico this cullivar produces
 large roots that are considered useful for industrial purposes. Black Rock and Trompo Negro produced the smallest
 sweet potatoes.

 Table 21. Storage root yield, size and weevil damage of sweet potato varieties grown in
 spring-fall, 1992, at UVI-AES.

 Total Roots of Marketable Size
 Variety yield' SPW2 Yield' Size' Dry matter'
 (t ha"') (t ha-') (t ha-') (g) (t ha')

 Perta 28.6 a 2.0 24.5 a 306 b 7.3 a
 Viola 26.8 a 2.0 21.9 a 238 bod 7.3 a
 Tapato 22.9 ab 0.4 21.4 a 446 a 6.0 ab
 Sunny 22.8 ab 2.0 17.3 ab 260 bc 5.1 bc
 SKB-2 18.3 b 1.6 12.9 bc 275 bc 4.2 bc
 CS-2 15.3 bc 0.8 9.2 cd 192 cd 3.4 cd
 SKB-4 15.0 bc 1.7 10.3 cd 213 bcd 3.8 cd
 Trompo Negro 8.1 cd 1.3 5.1 de 167 d 2.0 de
 Black Rock 6.5 d 0.8 1.7e 129 de 0.7 e

 'Means within a column followed by the same letter are not significantly different by Duncan's
 Multiple Range Test, (P=0.05).
 ISPW Sweet potato weevil damaged storage roots of marketable size.


 Trompo Negro and Black Rock produced less fresh and dry biomass than the other cullivars (Table 22). The
biomass produced by SKB-4, SKB-2, Violaand CS-2 was over 401 ha"-' (fresh) and 11.0 t ha-' (dry), twice the amount
produced by the lowest-yielding varieties Trompo Negro and Black Rock.
 Peria, Tapatoand Sunny produced vines that make propagation, handling and crop establishment more tedious
than for the other varieties. However, these varieties along with Viola, which produced a similar quantity of foliage,

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