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松干蚧是我国油、赤松林中的主要害虫。早在1942年前后,发现于我省辽东半岛西南端旅顺口区的老铁山,每年以20余华里的速度自辽东半岛西南向东北呈扇面形蔓延,现已蔓延到沈阳、抚顺、本溪、丹东四市,松干蚧能够在新区繁殖起来,是与气候条件密切相关的,特别是湿度,不仅影响该虫的生长发育速度,更影响存活率和繁殖力。为深入研究松干蚧发生发展规律,我们做了松干蚧二龄无肢若虫、卵、雄蛹的生长发育和湿度的关系的试验。
Song Kuwana is China’s oil, red pine forests in the main pests. As early as 1942, it was found that Laotieshan in the Lushunkou area on the southwestern tip of Liaodong Peninsula of our province lasted about 20 kilos annually from the southwest to the northeast of Liaodong Peninsula and now spread to Shenyang, Fushun, Benxi, Four cities in Dandong and Songjiancao can multiply in the new area, which is closely related to climatic conditions, especially the humidity, which not only affects the growth and development of the insects, but also affects the survival rate and fecundity. In order to further study the rule of occurrence and development of Pinus kochia, we did the experiment on the relationship between the growth and development and the humidity of the second instar nymphs, eggs and male pupa of Pinus taiwanensis.