论文部分内容阅读
1960—1963年作者在六安进行了大麻小象鼻虫生活习性观察和防治試驗。小象鼻虫是六安地区大麻生产上的主要害虫。一般大麻被害株率为50—80%,严重时被害株率达100%,通常一株上有虫二至三头,最多的一株有虫十二头。該虫食性专一,仅为害大麻一种作物。成虫取食叶肉,或取食嫩头,或以口器揷入嫩茎組織内部,吸食汁液。大麻受害后,由于生长受阻,即从腋芽发杈,形成无数杈头。幼虫在孵化后,便鑽入茎內生活,蛀食茎髓;麻茎被蛀后,呈肿瘤現象,受风害易折断,因而麻皮产量和質量大大降低。小象鼻虫在六安地区常年发生一代,但有时发生不完全的第二代(产卵)。以成虫在麻地特别是留种麻地附近高燥的地方如坟墓,高坡竹园的杂草或
From 1960 to 1963, the author conducted a small-scale weevil cannabis observation and control experiment in Lu’an. Baby weevils are the major pests in the production of cannabis in Lu’an. General marijuana plant strain rate of 50-80%, severely killed plant rate of 100%, usually a worm on the two to three, the largest of a worm twelve. This worm-eating specific, only a crop of marijuana damage. Adult feeding on the mesophyll, or feeding fresh head, or into the excrement into the tender stem tissue inside, drink juice. After the marijuana damage, due to growth retardation, that is, from the axillary buds twigs, forming numerous twigs. After the larvae hatch, they drill into the stems, and eaten the stems. After the stems have been eaten, the larvae show the phenomenon of tumors and are easily broken by the wind damage. Therefore, the yield and quality of the cakes are greatly reduced. Small weevils occur in perennial areas of Lu’an, but sometimes incomplete second generation (spawning) occurs. To adults in the marsh, especially in the vicinity of dry marsh near high dry places such as graves, high slope Chuk Yuen weeds or