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1.松毒蛾和松尺蠖在大兴安嶺一年發生一代,以卵越冬。此兩种害虫的幼虫在林中只發現生活于落叶松上。 2.松毒蛾♀蛾翅已退化成三角形的遺跡,身体肥硕,灰白色,不大活动。♂蛾前翅火黄色,各具腎臟形白斑一塊,很活躍。成虫羽化,交尾和产卵等活动主要在日間进行。 3.松毒蛾幼虫危害期从6月中旬到8月下旬,历时51—70天。幼虫♀性6龄,而♂性只有5龄。 4.松尺蠖♀蛾翅亦退化,只見微小痕跡,身体不如松毒蛾肥硕,足細長,行动敏捷。♂蛾体軀各部黄褐色,其中并渗有許多灰黑色小斑点,前翅各具横渡波狀紋一条(即由前緣至后緣)。成虫羽化多在清早,而交尾和产卵活动都在夜間举行。 5.松尺蠖幼虫期共6龄,危害期为5月下旬至7月上旬,历时35—37天。幼虫入土化蛹,通常蛹期長于幼虫期一倍左右。
1. Pine gnats and pine bream in the Greater Xing’an Mountains occur a generation a year, overwinter with eggs. The larvae of these two pests only found in the forest living on the larch. 2. The pine moth moth moth wings have degenerated into a triangular ruins, body fat, gray, not much activity. Male moth wings yellow fire, each with a kidney-shaped white spot, very active. Adult emergence, mating and spawning activities are mainly carried out during the day. 3 pine moth larvae damage from mid-June to late August, lasted 51-70 days. Larvae malaria 6 years old, and ♂ only 5 years old. 4 pine slender moth wings also degenerated, I saw tiny traces of the body as good as pine moth plump, enough slender, quick action. The body of male moths is yellowish-brown in color. There are many grayish black spots infiltrated into them, and each of the frontal wings crosses a wavy pattern (that is, from the leading edge to the trailing edge). Adult emergence in the early morning, and mating and spawning activities are held at night. 5 pine bream larvae a total of 6 age, the damage period from late May to early July, lasted 35-37 days. Larvae into the pupation, usually pupal period is about twice the larval period.