Autumn military insect control QA02 "is it appropriate for farmers to buy pheromones to catch insects?" Does it have native predators?

396 sharing

A few days ago, the Council of Agriculture announced that it had entered the "second stage of prevention and control," calling on farmers to notify the eggs, pupae, larvae and adults of the autumn worms, and the local government should start spraying operations. Many farmers ask whether the availability of pheromones catch bugs? Does the insect have native natural enemies? Autumn army insects may take root in Taiwan. how can they co-exist with autumn army insects in the future? Upstream and downstream interviewed Xu Rujun, a professor in the Department of Entomology at National Taiwan University, yen Sheng-Kui, an associate professor in the Department of Bioscience at Sun Yat-sen University, and experts from the Bureau of Prevention and Quarantine to explain the current specific methods of epidemic prevention.

Q: can farmers use sex pheromone to control autumn army insects?

A few days ago, the pheromone Center of Chaoyang University of Science and Technology said that the sex pheromone of autumn walking army insects had been prepared, and farmers who were willing to participate in the monitoring test were invited to cooperate. Zeng Ruichang, director of the pheromone Center at Chaoyang University of Science and Technology, explained that "pheromone" is like the communication language of animals. in the insect world, sexual pheromones are mostly released by females, and distant males receive this "message." will follow the trajectory of sexual pheromone to find the female. The "sex pheromone trap" also uses this principle to attract males, making them think that there are females living in the trap, desperately drilling inside, and finally trapped and captured.

He explained that the sexual pheromone composition of each kind of insect is fixed and specific, and that if you want to know the sexual pheromone structure of the autumn army insect, you need to cultivate a large number of autumn army insects in the laboratory and isolate the female insect and provide sufficient food and environment. The researchers take this opportunity to collect the sex pheromone released by the insect, and after analysis, they know its exact structure. Since there were no autumn bugs in China before, they made reference to international materials to synthesize sex pheromones on their own. "the composition and proportion of sex pheromones should be confirmed that the more the dose, the better the effect, and the concentration is wrong. Males may not be willing to run into the trap."

He pointed out that sex pheromone has three major applications: monitoring and early warning, mass booby and killing, mating interference and so on. The main purpose of "monitoring and early warning" is to detect the presence of pests in the area in order to formulate relevant control strategies. "each pest has a suitable distance between pheromones (traps), and the placement density is fixed, not a large number." "mass trapping" is a task of trapping in addition to the monitoring function, so it will increase the number of traps to catch a large number of males, while "mating interference" is to increase the concentration of female pheromones. Nearby males are physiologically affected.

Culling autumn army insects teaching war manual! Appearance, fecal bite marks, experts: autumn army insects are prone to drug resistance. "use medicine only when you see the worm."

(to read more autumn army and insect news, please click here.)