Random pattern of parasitism and female-biased sex ratio in the egg parasitoid Neochrysocharis formosa attacking the pine sawfly Diprion pini in mountain forests of Spain

1. Selfa, J.
2. Polidori, C.
3. Asís, J.D.
4. De Pedro, L.
5. Pujade-Villar, J.
6. Tormos, J.