Tomatoes were harvested at the full ripe or turning stages. Six harvests were performed during the trial The
first harvest was conducted on May 23 and the last on June 21. The harvest period lasted for 31 days. Yelds were
determined from the center row of each three-row plot.
 Data on marketable yield and fruit size are presented in Table 1. Among the eight varieties, Capitan produced
the highest yield of 28.7 t ha-'. Calypso, Duke, Pole King and Tropic produced yields lower than 6.0 t.hat. Luxor,
UH-N52 ariUH-N69 prokced yields of 11 to 12t ha-. The latter two varieties have somresistance to nematodes
and were developed by the University of Hawaii. They were expected to perform better in hot dry climates. Variety
Luxor prodded the largest fruit (227 g), while varieties Calypso, Pole King and Tropic had a fruit that was similar
In size (199 g). Although variety Captan produced the highest yield, the fruits were small (142 g). Varieties UH-N52
and UH-N69 also produced smaller fruits (142 and 170 g, respectively). The data suggest that for the spring tomato
growing season, Capitan would be the best variety for the Virgin Islands in terms of total yield.

Summer, 1988

 This trial was conducted with the main objective of evaluating heat-tolerant tomato varieties developed by the
Asian Vegetable Research and Development Center (AVRDC) in Taiwan. Twelve heat-tolerant tropicaltomato lines
were tested during the summer of 1988. These advanced lines carry additional good trats such as resistance to
diseases (other than bacterial wilt), fruit firmness, cracking resistance and Improved fruit size.
 The 12 tomato lines were planted along with a check variety, Caphan. Similar experimental procedures and
cultural practices were followed as In the spring trial, except that tomato seeds were direct-seeded Instead of
transplanted. Seeds were planted on June 27, 1988. Tomato fruits were harvested for fresh market when the
blossom end turned pinkish or reddish. The first of five harvests was performed on September 6; the last was on
September 28. The plants grew for 71 days from seeding to first harvest and 93 days to last harvest.
 Total marketable yields of the varieties evaluated are presented In Table 2. Of the 12 varieties, only one
produced a yield which was statistically similar with Captan (the check variety). Variety CL 5915-390D4-1-2-0
yielded 15.6 t ha-1 compared with 18.4 t ha-r for Capitan. Variety CL 5915-153D4-3-3-0 ranked third with a yield of
10.0 t ha-1. The other lines produced yields lower than ten tons. The lowest yield of 2.2 t ha1' was obtained from FMTT
6. Most heat-tolerant lines produced fruits smaller than 100 g. Only FMTT3 produced fruit with average weight of
106 g, but this was still smaller than Capitan with average fruit weight of 131 g.
 No serious diseases occurred during the trial, but leaf miner, stink bugs and tomato fruit worm were the common
Insect pests that affected the crop.


Table 2. Total marketable yield of heat-tolerant tomato varieties grown
during summer, 1988, at UVI-AES.

 Marketable Fruit
Variety yield' size
 (t ha") (g)

Capitan 18.4 a 4131
CL5915-390D4.1-2-0 15.6 a 67
CL5915-153D-3-3-0 10.0 b 39
CL5915-93D,-1-0-L-2 9.0 c 54
CL6915-223D4-2-1-0 8.9 C 49
FMITT 8.9 c 106
CL5915-206D4-2-4-0 7.9 c 78
CL5915-93D,-1-0 7.8 c 71
CL5915-206D4-2-2-0 7.4 c 47
CL5915-93D -1-0-C-1 6.7 c 62
CL5915-206D4-2-5-0 6.1 c 86
CLN65-349D,-0-2-0 3.7 c 44
FMTT, 2.2 c 80

'Means within a column followed by the same letter are not
significantly different by Duncan's Multiple Range Test,(P=0.05).
 S19,l ..