Also known as iron yak, foot worms, and wood worms, Tengu is an important malignant pest in the orchard that often causes damage to the garden. It is harmful to peaches, plums, pears, oranges, chestnuts, grapes, alfalfa, longan, litchi. , dates and kiwifruit. The common species of the beetle pests are red neck beetle, spotted tiger beetle, green longicorn, star longicorn and brown longicorn. The calf larvae feed on the cortex and xylem of the roots and trunks of fruit trees. The tree vigor gradually weakens, the leaves yellow and wither, the fruit yield and quality are reduced, and the tree body death is caused when the larvae are severe. The adult larvae bite into the tender branches and leaves or produce When the eggs bite into the bark, they cause wounds. After more than 10 years of production practice, the author discovered that in the autumn and winter, the effective comprehensive control technology can be used to quickly eliminate Tianniu. I. Assassination or hooking of larvae During the period from August to September, the larvae of the larvae in the hole were infested. After determining the size of the worm and the presence or absence of insects and their status in the cavity, use a thin wire to insert the tunnel end from the fresh defecation hole into the tunnel and repeat the procedure several times to kill the larvae. It is also possible to use a small iron drill to hollow out the insect in the hole, use a steel wire around 18 to 24 to form a ring, a small hook at the front, relying on the depth of the hole into a ring of ring into the loose, slow-twisting and slow delivery , to kill. Second, the early larvae of poisonous larvae can use dichlorvos, trichlorfon, insecticidal double or insecticides and other agents 20-30 times liquid spawning groove groove effect is very good; into the xylem larvae are first empty insects, Then use a rotten cloth or cotton stained with dichlorvos or omethoate emulsion 5 to 10 times the liquid into the fistula cavity tightly; if the fistula can not be a single hole can use a large syringe to inject the liquid into the cavity , and then mud sealed hole; can also be used to inject gasoline into the wormhole syringe or broken into the hole with mothballs, the amount of each hole 1 ç‚·, and then sealed with yellow mud, the above methods have good effect on the killing of larvae. The poisoning method should be carried out before September to October. III. Killing of Tianlong Adults From early August to mid-September, the Tianni adults like to swelter hot, wind the south wind in the evening or hot noon. The branches of the old trees or the branches of the young trees can be caught at the branches and can be caught in time. Kill it. Fourth, to strengthen the winter clearing garden winter clearing and pruning, to check the various holes in the trunk, use clay to block holes, while repairing the rough burst burst bark, keep the trunk smooth, and the time and plant density and insect density The senescent trees brushed the trunk and main branches before the cold began. In addition, from mid-May to early June of the following year, the days of spawning and larval hatching, the topsoil around the tree pods was split, and 50 ml of omethoate was added to the soil to make it uniform. It can effectively prevent the adult larvae or newly hatched larvae on the trunk of the hammer from being hit by small hammers in time after laying eggs, and the control effect is also good.
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