3.The experiment of contral of Lophodermium pinastri (Schrad.) Cher were carried out in the field and in the forest.The results showed spraying 45% Amobam Solution could reach an efficacy of 81.2%.

• 对马尾松幼林的松落针病作小区和林间防治试验,结果表明,林间应用45%25代森铵水剂防治效果最佳,平均防效达81 2%25。