Study on resistance of poplars toMarssonina brunnea

Abstract

Inoculation experiment was made for 15 poplar species to determine their resistance toMarssonina brunnea by the agar leaf-dise technique and the water-culture shoots technique. The results show thatPopulus simonii andP nigra var.thevestina are very suseeptible to the disease:P. davidiana andP. koreana are slightly resistant to the disease:P. ussurrensis has high resistance, and the others remain moderate resistance. Experiments are also made for healthy leaves to analysis the inorganic element content and water content. And the results show that the contents of Fe and Ca are remarkbly negatively related to the resistance of poplars toMarssonina brunnea.

References

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