The Control Techniques of Maize Tiger

This year is the worst drought in 100 years. Due to the drought, the land tigers in Taiji Township of Dali City have been seriously affected. The ground tiger is also called silkworm, silkworm, and rootworm. It is a relatively common underground pest.

The life of a tiger is divided into four stages: eggs, larvae, cockroaches, and adults (moths). Adult body wings dark brown. The ground larvae generally suffer from serious damage to the first generation larvae, and the life and harmful habits of the instar larvae are different. The 1st and 2nd instar larvae stayed alive during the day and night, feeding on the leaves or young leaves; after 3rd age, they hid in the soil during the daytime and harmed by the night out activities. They bitten off the tender stems of the seedlings, resulting in lack of seedlings; the resistance of the 4th instar larvae was greatly enhanced. Therefore, chemical control should eliminate larvae before 3rd instar. Trapping adult worms is the best way to control the ground tigers, which can greatly reduce the number of first-generation larvae. The method is to use black light and sweet and sour liquid to kill. Weeds are the main sites for adults to lay eggs, and they are also important ways for larvae to transfer to corn seedlings. Completely eliminate weeds before corn emerges, and remove them from the fields for feed or manure, and throw them away. Eradication of weeds will effectively reduce the population of insect populations. Pharmacy control is still an important measure to eliminate the tigers. When sowing seed dressing can be used, with 50% phoxim emulsion 0.5 kg water 30 to 50 liters 350 to 500 kg of seeds mixed. For the larvae over 4 years old, bait trapping effect is better. 0.5 kg of 90% trichlorfon is opened with hot water, add about 5 liters of clear water, and spray on sauteed oil dregs. 60-75 kg of baits per hectare were used for spreading in the evening.

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