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. 2014 Oct 22;105(1):60–69. doi: 10.1017/S0007485314000753

Table 1.

Interval and mean number of aphids for each category according to the qualitative index.

Category Number of aphids Mean
1 0–12 6
2 13–36 25
3 37–108 73
4 109–324 217
5 325–972 649
6 973–2916 1945