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| poplar aphid (Pemphigus); poplar gall aphid (Pemphigus); lettuce root aphid (Pemphigus bursarius); poplar leaf-stalk aphid (Pemphigus bursarius); poplar-lettuce aphid (Pemphigus bursarius) | |||
| poplar gall aphid (Aphioides, Pemphigus) | |||
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puceron du peuplier : 14 phrases in 2 subjects |
| Entomology | 12 |
| Natural resourses and wildlife conservation | 2 |