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利用赤眼蜂(Trichogramma dendrolimi Matsumura)防治松毛虫(Dendrolimus superans Butler)时,赤眼蜂在松林内被释放后,能够寄生距离放蜂点多远的寄主卵,是决定在松林内放蜂点分布距离的主要因素。为此,我们进行了该项测定试验,现将试验结果整理如下。一、试验地林分概况试验在较平缓沙丘上的人工油松(Pinus tabulaeformis Carr)纯林内进行的。树龄17年,平均树高5米,平均胸径9厘米,郁闭度0.8,地被物稀少。二、试验时气象条件试验于7月6—14日进行。每天8时、14时、18时分别于中心点进行观测,记录林内温度、湿度、风速及风向。现将观测结果列表1、表2。
When Trichogramma dendrolimi superans was used to control Trichogramma dendrolimi Matsumura, the host eggs that parasitized far away from the plexus after the Trichogramma was released in the pine forest decided to put the bee point distribution in the pine forest The main factor of distance. To this end, we conducted the measurement test, the test results are summarized below. First, the experimental site of the general situation of the test in the more gentle dunes of Pinus tabulaeformis Carr pure forest. The age of 17 years, the average tree height of 5 meters, an average diameter of 9 cm, canopy density of 0.8, ground scarce. Second, the test meteorological conditions test on July 6-14. Every day at 8 o’clock, 14 o’clock, 18 o’clock at the center were observed and recorded forest temperature, humidity, wind speed and direction. Now the observation results list 1, Table 2.