Abstract:

In order to explore the control effect and technique of trapping pests by sex pheromone and improve the application of pheromone technology in the broccoli field as well as their effects in a large scale, lures, special gyplur and traps were combined to lure pests based on the surveillance of population dynamic of Spodoptera litura Fabricius, Spodoptera exigua Hübner and Plutella xylostella L. The results showed that population number fluctuation Spodoptera litura F., Spodoptera exigua H. and Plutella xylostella L. in the production periods in Linhai area of Taizhou showed ‘W’ shape, growth time of seedling (between June and August), rosette stages and bud growth time (late September to late December), harvest stage of late broccoli (after early March). In the period of seeding, Spodoptera exigua H. and Spodoptera litura F. did some harm to broccoli; At the rosette stages and bud growth time, Spodoptera exigua H. and Putella xylostella L together brought harm; In late harvest time, Plutella xylostella L. did harm to the little nosegay bouquet on the branch. The study of killing Spodoptera litura F., Spodoptera exigua H. and Plutella xylostella L. based on different combination of gyplure showed that, the combination A and combination E was he best way to kill the pests, more than 84 pests were generally killed every 667 m2 and the kinds of pest could be controlled. Taking gyplure produced in Ningbo as an example, the combination form should be pattern S, Spodoptera exigua H. also pattern S and Plutella xylostella L. blue pattern and in the field the combination should be displayed a formation of a quincunx, the in-between distance was 10-20 m. The treatment was the hang height for noctuids was 50 m (for young noctuids, 20 m), lure changes every 30-40 days. Large-scaled application of this combination had good effects on killing pests.In the period of seeding, asparagus caterpillar and spodoptera litura do some harm to broccoli; At the Rosette stages and bud growth time, asparagus caterpillar and putella xylostella L together brings harm; In late harvest time,plutella xylostella L does harm to the little nosegay bouquet on the branch. The study of killing spodoptera litura（Fabricius）, asparagus caterpillar and plutella xylostella L. based on different combination of gyplure shows that, the Combination A and Combination B is he best way to kill the pests, more than 180 pests are generally killed every 667m2 and the kinds of pest can be controlled. Taking gyplure produced in Ningbo as the example, the combination form should be Pattern B,laphygma exigua also Pattern B and plutella xylostella L. Blue Pattern and in the field the combination should be displayed a formation of a quincunx, the in-between distance is between 10 meters and 20 meters. The treatment is the hang height for noctuids is 50 meters( for young noctuids, 20meters) , lure changes every 30 0r 40 days. Large-scaled application of this combination has good effects on killing pests.