AVRDC – The World Vegetable Center; P.O. Box 42, Shanhua; Tainan, Taiwan 74199; ROC
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Procedures for Chili Pepper Field
Evaluation Trials
T.G. Berke and P. Gniffke
Introduction
These suggestions are intended for researchers evalu-
ating the International Chili Pepper Nursery (ICPN) tri-
als, coordinated by AVRDC. (Other researchers inter-
ested in testing chili peppers under their local condi-
tions might also find the procedures useful.) In order
that data recorded at different locations can be com-
pared, it is essential that data collection be done uni-
formly. These instructions were developed to provide
uniform procedures. For more information on seedling
and crop production, see the AVRDC Cooperators’
Guide Suggested Cultural Practices for Chili Pepper.
Choice of land
Select an area which is well drained and has fairly
uniform fertility and slope.
Experimental design
A randomized complete block design with four replica-
tions is suggested (Figs. 1,2).
Number of entries
In addition to the entries included in the ICPN, it is
expected that two local varieties will be added at each
location for comparison. Each seed envelope contains
approximately 200 seeds, more than enough for an
initial two-row plot trial (20 plants/plot) with four repli-
cations.
Plot specifications
Each plot should be on a raised bed 1 m wide and 5 m
long, with two rows of plants 50 cm apart. Plant spac-
ing within rows should be 50 cm. The suggested dis-
tance between furrows is 1.5 m, thus giving a plot size
of 1.5 x 5 m (7.5 m2).
Seedling establishment
Ideally, seedlings should be raised in seedling trays
using a sterile sowing medium so that healthy, vigor-
ous seedlings are produced. If seedlings are started in
a soilbed, the soilbed should be sterilized by burning
a layer of rice straw or other organic matter on top of it
before sowing. Seedlings should be raised in a green-
house or screenhouse, or protected with nylon netting
to keep out ap