Investigation On Insect Natural Enemies Of Monochamus Alternatus Hope (Coleoptera: Cerambycidae) And Studies On Bio-control Of The Pest

Pine wood nematod, Bursaphelenchus xylophilus, is the number one pest for China forests right now. Pine sawyer, Monochamus alternatus is the most important vector of the nematod. The key control technique of B. xylophilus is to suppress the population of M. alternatus. Therefore, we studied the technique of biological control of pine sawyer. This dissertation summarized our researches on the program. It contains two parts: in the first part, biology, behavior and control technique of the cerambycid which conducted by other people previously, has been described; and in the second part, the researches including investigations on insect natural enemies, biology of the cerambycid, and biological control technique using the natural enemies Carried out by the present author, were introduced. The research results obtained are as follows:1. A new predator of M. alternatus was found for the first time in China, Cryptalaus berus (Coleoptera: Elateridae) , and predated the host larvae over 28 individuals during its larval stage.2. Another two new predators of M. alternatus were found as well in China: gold-ringed elaterid and black elaterid (scientific names need to be identified further) . The former species could consume over 24 host larvae, and the latter predated over 27 middle-aged host larvae in their larval stage respectively. They were very aggressive and could enter into many galleries of M. alternatus larvae to find host for consumption. They have high potential as biological control agents against the pest.3. The technique which adult of Dastarcus helophoroides, a...