Open Access
Table 2.
Parasitism rate of Aphelinus mali in the blood aphid population
| Observation date | Number of aphids in hot spots | Parasitism rate, %* | |
|---|---|---|---|
| Total number | Number of parasitized aphids | ||
| 06.07.2018 | 70 | 20 | 28,50 |
| 12 | 7 | 58,30 | |
| 25 | 23 | 92,00 | |
| 11 | 8 | 72,70 | |
| 15 | 12 | 80,00 | |
| 45 | 43 | 95,50 | |
| 24 | 13 | 54,10 | |
| 13 | 12 | 92,30 | |
| 16 | 9 | 56,20 | |
| 49 | 31 | 63,30 | |
| Mean | 28,0 | 17,8 | 69,29 |
| 27.09.2018 | 50 | 45 | 90,00 |
| 25 | 22 | 88,00 | |
| 15 | 13 | 86,70 | |
| 7 | 4 | 57,10 | |
| 12 | 9 | 75,00 | |
| 16 | 13 | 81,30 | |
| 11 | 9 | 81,80 | |
| 37 | 30 | 81,00 | |
| 9 | 8 | 88,80 | |
| 41 | 33 | 80,60 | |
| Mean | 22,3 | 18,6 | 81,03 |
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