油松对赤松毛虫的诱导化学防御及滞后诱导抗性

对当年受赤松毛虫危害和未受危害的油松新长出的一年生针叶化学成分以及用其饲养的赤松毛虫的发育情况进行了测定分析，结果发现受害油松新长出的一年生针叶化学成分仍有较大幅度的变化，主要表现在氨基酸总量及多数游离氨基酸含量下降；水溶性总糖，粗脂肪，生物碱含量及总糖／投案基酸比例上升；脂肪酸、单宁、酚类化合物均有较大幅度的减少，用其饲不养的赤松毛虫幼虫体三 ，死亡率比对照高１９．２％，油松对赤松毛虫的滞后诱导

INDUCED CHEMICAL DEFENSES AND DELAYED INDUCED RESISTANCE OF PINUS TABULAEFORMIS CARR.TO DENDROLIMUS SPECTABILIS BUTLER

According to chemical analysis and bioassay of one\|year needles of the damaged and undamaged Pinus tabulaeformis Carr.and larvae of Dendrolimus spectabilis Butler fed on these needles,it was found that the chemical components in the needles of damaged pine had caused regarded growth compared with undamaged pine.The results shows that:(1) total amino acids and most amino acids declined in quantity;(2) the concentrations of soluble sugar,crude fat,alkaloid and ratio of total sugar to total amino acids all increased;(3) there were conspicuous changes in fatty acid and phenolics.(4) weights of the larvae fed on needles of damaged trees were lighter than undamaged trees;and (5) mortality of larvae fed on these needles was 19.2% higher than those fed on leaves of undamaged trees.Delayed induced resistance of Pinus tabulaeformis Carr.to Dendrolimus spectabilis Butler lasted for half a year at least.