关键词: 天牛成虫, 化学信息素, 性信息素, 嗅觉感受机制

Abstract:

Advances in the studies on semiochemicals and olfactory recepting mechanism in adults of cerambycid beetle were reviewed. The sex pheromones produced by the female or male are classified into 3 types, namely, shortrange, longrange and contact sex pheromones. Up to now, sex pheromones of about 31 species of cerambycid beetles have been studied. Among them, components of sex pheromones of 13 species have been identified. The variation of sex pheromone exists in the same species, e.g., the proportions of components of sex pheromone produced by the longhorned beetles of the same species from different places are different. Antennae are the main perceptive organs to receive sex pheromones and can also be used as the morphological indicator for differentiating communication ways in adults. Obvious sexual dimorphism is accompanied by the strong sex pheromones. Longhorned beetles use host pheromones (such as terpenoids, alcoholates and aromatics) to find and select host. Trap catches in field will be increased by a combination of sex and host pheromones. Other sorts of pheromones (such as heterospecific pheromones, repellent pheromones and ovipositiondeterring pheromones) can raise the efficiency of cerambycid hostselecting. RNs of cerambycid olfactory sensilla located on the antennae can be classified as 3 types. The odour information is passed to the CNS by neurone populations. The information is conveyed to the brain by labeled line or acrossfiber patter. There is no report on the studies of cerambycid OBP.

Key words: Cerambycid beetles, semiochemicals, sex pheromones, olfactory receptor echanism