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通过人工模拟危害程度和自然状况下马尾松毛虫危害等试验所获得的大量数据,利用微机进行统计和分析。结果表明:5～10年生马尾松针叶损失50%时,越冬代对当年高生长有显著的影响;5～20年生马尾松针叶损失50%,第二代对后一年的树高、胸径、材积有显著的影响;针叶损失70%以上时,越冬代对当年、第一代对当年、第二代对后一年的树高、胸径和材积均有极显著的影响;针叶损失100%时,第一代还对后一年的树高、胸径和材积有极显著的影响。其中以第一代马尾松毛虫危害最大,越冬代和第二代相近似。这为制定马尾松毛虫防治指标,开展综合治理工程提供了重要的科学依据。
Through the artificial simulation of the degree of harm and the natural conditions of Masson’s pine caterpillar damage and other tests obtained a large number of data, the use of computer statistics and analysis. The results showed that overwintering generation had a significant effect on the high growth of the year when the mass loss of coniferous trees of Pinus massoniana from 5 to 10 years was 50%, the loss of 50% of Pinus massoniana cones from 5 to 20 years old, the tree height, The results showed that when the loss of needles was more than 70%, the overwintering generation had the most significant effect on the current year, the first generation had significant effect on the tree height, DBH and volume of the second year and the second year; %, The first generation also had a very significant effect on tree height, DBH and volume of the year after. The first generation of Masson pine caterpillar harm the most, the winter and the second generation similar. This provides an important scientific basis for formulating the prevention and control index of Masson pine caterpillars and carrying out comprehensive management projects.