Trap bags were used to assess the presence of an Armillaria species in a Pinus koraiensis plantation in Heilongjiang, China. 216 trap bags containing bark were placed in three plots at 2×2m spacing. After 10 week...Trap bags were used to assess the presence of an Armillaria species in a Pinus koraiensis plantation in Heilongjiang, China. 216 trap bags containing bark were placed in three plots at 2×2m spacing. After 10 weeks, the presence of Armillaria was determined from the growth of rhizomorphs in the trap bags. The trap bag method proved successful in determining the presence of viable Armillaria rhizomorphs where only a few dead trees showed signs of the disease. The distribution of positive traps corresponded generally with the presence of rhizomorphs in the soil taken from the trap holes. However, the trap bags were superior to soil samples for evaluating the presence of viable rhizomorphs. The fresh, abundant rhizomorphs were easily identified by persons inexperienced in the assessment of Armillaria root rot. Several practical problems need to be solved before the method is applicable in general forest management in China.展开更多
文摘Trap bags were used to assess the presence of an Armillaria species in a Pinus koraiensis plantation in Heilongjiang, China. 216 trap bags containing bark were placed in three plots at 2×2m spacing. After 10 weeks, the presence of Armillaria was determined from the growth of rhizomorphs in the trap bags. The trap bag method proved successful in determining the presence of viable Armillaria rhizomorphs where only a few dead trees showed signs of the disease. The distribution of positive traps corresponded generally with the presence of rhizomorphs in the soil taken from the trap holes. However, the trap bags were superior to soil samples for evaluating the presence of viable rhizomorphs. The fresh, abundant rhizomorphs were easily identified by persons inexperienced in the assessment of Armillaria root rot. Several practical problems need to be solved before the method is applicable in general forest management in China.
