Control techniques of Underground pests in Upland Rice

In recent years, upland rice planting in Gejiu City has become a new bright spot in rural economic growth in mountainous areas with the application and popularization of upland rice transplanting technology. How to control underground pests is an important technical measure to develop upland rice production and ensure upland rice yield and income increase.

Common underground pests of upland rice mainly include grubs (beetle larvae), insects (kowtow larvae), mole crickets (la la cricket), ground tigers (interceptor) and so on. This kind of pest lives in the soil during the damage period, eating seeds, sprouts and rhizomes, causing lack of seedlings, broken ridges or poor growth of seedlings, or even destroying seeds, resulting in yield reduction.

According to the requirement of upland rice production at present, this paper puts forward the technical measures of integrated control of upland rice underground pests for reference of producers.

I. Agricultural control

After harvest of previous crop, tilling and sun-drying shall be carried out in time to eliminate overwintering eggs and reduce insect source in the coming year; before sowing, part of insect bodies shall be killed by tilling and harrowing; before crop emergence or in the peak period of 1-2 instar larvae of cutworm, weeds in the field shall be shoveled and buried deeply or compost shall be transported out of the field in time to eliminate hosts, reduce early food for larvae and reduce the occurrence and harm of underground pests.

II. Chemical control

(1) Seedbed stage: 50% phoxim 0.5 kg mixed with appropriate amount of water, gradually expanded into 150 kg of toxic soil, scattered near the seedling rhizosphere, 20 kg of toxic soil per mu, can control a variety of underground pests. 2000 times solution of 2.5% enemy kill is used to spray seedling beds in the evening. Because the temperature is low at night, the evaporation is small, and the soil and seedlings are covered with dew, the efficacy can be guaranteed, and the effect on controlling cutworm is especially good.

(2) Field period: When transplanting rainwater through the ground, use 100g of 50% phoxim emulsifiable concentrate per mu, mix with fine sand or fine soil 30kg, and spread it in the planting ditch to control a variety of underground pests. When damaged plants are found in the growth period, 90% crystalline trichlorfon 800 times or 50% phoxim EC 1000 times can be sprayed on the roots of plants, focusing on spraying seedlings near the damaged plants, spraying once every 7-10 days, spraying continuously for 2-3 times, which can play a better control effect. In sunny evening, spraying 2000 times solution of 2.5% Encide on the ground can effectively kill the cutworm larvae in the plots where the cutworm is rampant.

3. Trap and kill control.

(1) Plant trapping and killing: by planting sesame and other crops that cutworms like to lay eggs, they are induced to lay eggs and then plucked and burned.

(2) Trapping by branches: During the adult development period of white grubs, fresh poplar and willow branches with a length of about 1 meter are soaked in a 50-fold dilution of 40% dimethoate, taken out after 10 hours, inserted into the field before evening, and inserted 10 - 15 branches per mu.

(3) Light trapping and killing: The adults of chafers, cutworms and grubs have a strong tendency to black light lamps. According to the actual situation in various places, under possible conditions, some black light lamps are set up during the peak period of adults to trap and kill them.

(4) Sweet and sour wine basin trap: In the peak period of the moth of the ground tiger, brown sugar: vinegar: white wine: water is mixed at 3:3:1:10, 50% dichlorvos emulsion is added according to the proportion of 0.1% of the total amount, the sweet and sour wine liquid is put into the earthen bowl, and it is appropriate to hold it to half a bowl. It is placed in the field in the evening, slightly higher than the crop. Every 3 - 5 mu, a bowl is placed. After removing the moth every day, cover it, and then uncover it in the evening to attract moths.

(5) Poison bait trapping: 50% phoxim emulsifiable solution, diluted by 1:20 times, evenly sprayed on chopped fresh grass or vegetable leaves, divided into small piles in the evening and placed in the field to trap black tiger.