The number of CCW larvae was significantly reduced
by PRP species only at 36 DAS (Table I). The mean number
of insects ranged from 0.3 to 1.3 insects/m2 with the lowest
number in plots associated with citronella grass and the
second lowest in sacred basil.
Pest damage. At harvest, the % pest damage was
significantly different among PRP species (Table II). Both
sacred basil and citronella grass had the lowest pest
damage of 35 and 37% of the total number of Chinese
kale plants in the plot, respectively. Angelonia and sweet
basil also decreased pest damage to 47 and 53%,
respectively. The other PRPs had pest damage more than
60%, while the control had the highest pest damage. This
indicates that different plant species have difference in the
pest repellence and both sacred basil and citronella grass
are better in this aspect than the other plants used.
Yield and quality. The Chinese kale yield ranged from 2.2
kg/m2 (21.8 t/ha) in plots associated with coriander to 3.0
kg/m2 (29.6 t/ha) in sacred basil (Table II). However, the
yield of Chinese kale was not significantly different among
PRPs