|
|
| First biofix (A) |
Start accumulating degree-days when you first begin trapping adults
consistently.
|
| Monitor damage |
Begin monitoring the orchard for shoot
strikes when the degree-day total approaches 500. |
| Monitor next flight |
Begin checking pheromone traps twice weekly when the degree-day
accumulation reaches 800. Each generation takes about 920-1010
degree-days.
|
| Subsequent biofixes |
Start accumulating degree-days when there is a consistent increase
in the number of moths trapped.
|
| Monitor damage |
Begin monitoring the orchard for shoot strikes when the degree-day
total approaches 500.
|
| Treatment |
Treat 500 degree-days after the biofix if monitoring during the
previous generation found more than 3-5 shoot strikes per tree.
|
A graph of trap catch data
for oriental fruit moth can be used to schedule monitoring activities and
treatments if needed. The example here is from an unsprayed peach orchard
in the southern San Joaquin Valley. For each sampling date, plot the average
number of moths per trap, and use the graph to establish the biofix (A,
B, C, D, E) for each generation. Use degree-day accumulations to schedule
monitoring and treatments, if necessary, as outlined below.
Adapted from: Larry Strand. 1999. Integrated Pest Management for Stone Fruits. Oakland: Univ. Calif. Div. Agric. Nat. Res. Publ. 3389.
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