Study on the control efficiency of oviposition trap to long-horn beetle Philus antennatus
Chang, C. C., H. W. Huang , M. Y. Lin
Long-horned beetles (Philus antennatus) damage the root system and weaken the pomelo tree, make an enormous influence to the Madou wentan. The oviposition trap to Philus antennatus was developed in recent years. It works well and is accepted by the growers. The control efficiency of two oviposition traps to longhorn beetle was examined in a Madou wentan orchard during the reproduction season of Philus antennatus, 2012. The trees were treated with the wood board trap (WBT) and the newsprint paper trap (NPT) respectively. WBT is using two overlapping wood boards lying against the tree trunk and NPT is circling tree branch with crumpled newsprint paper. Result shows female beetles laid eggs in the artificial crack of both traps and more eggs were laid in the WBT than the NPT. Further comparison of the difference of oviposition of 2 traps reveals that the number of egg masses laid on WBT was significantly more than the NPT. Average of 8.67 egg masses per tree treated with WBT and 3.53 egg masses per tree with NPT were collected. The size of each egg mass of 2 traps was analyzed. Average 270 eggs per mass of WBT was significantly more than the 182 eggs per mass of NPT. Total 34114 eggs on WBT were collected during the experiment, which is 3.5 times than the 9631 eggs on NPT. The efficiency of WBT is better. It is also more convenient in operation than the NPT and is recommended to take as the oviposition trap in control of Philus antennatus.
What is already known on this subject?
The conventional methods for controlling of Philus antennatus is light trap and hand catching. Chemical control is restricted and ineffective because of the soil-habitated behavior of larvae. It also causes huge impact to environment.
What are the new findings?
The study compares 2 oviposition traps. The efficiency of wood board trap is better than newsprint paper trap. It works well and makes female beetles lay large numbers of eggs on it no matter the weather condition.
What is the expected impact on this field?
Compared with pesticide, wood board trap is effective and sustainable to the environment. It minimizes the population of Philus antennatus by blocking the life cycle, also reduces the damage of larvae to wentan tree, improves the quality of fruits and increases farmer's profits.
Key words: Philus antennatus, Madou wentan,
Accepted for publication: December 18, 2015