Table 1 Distribution and abundance of Sitobion avenae in Chile according to the host plant, year of collection and agroclimatic zone
Host plant | Zone 1 | Zone 2 | Total | ||||
|---|---|---|---|---|---|---|---|
1996 | 1997 | 1999 | 2000 | 1997 | 2000 | ||
Wheat | 28 | 65 | 62 | 440 | 42 | 125 | 762 |
Oat | 35 | 21 | ND | 77 | 24 | 18 | 175 |
Cocksfoot grass | 1 | 45 | ND | 4 | 13 | 7 | 70 |
Wild-oat | 10 | ND | ND | 8 | ND | 9 | 27 |
Mouse barley | ND | ND | 6 | 10 | ND | 2 | 18 |
Total | 74 | 131 | 68 | 539 | 79 | 161 | 1052 |
