Non-pollution Prevention and Control Techniques for Rice "Two Migration" Pests
The rice growth in June in the Sanjiang Dong Autonomous County of the northern Guangxi Province has entered the period of high tillering and young panicle differentiation, and the small environment in the field facilitates the breeding of rice planthoppers. At the same time, the climatic conditions and the small environment in the field are also conducive to the breeding of the third-generation rice “two-shifting†pest rice planthoppers and rice leafhoppers. From the beginning of June to the middle of June, the “two migration†pests of rice will enter the peak period of damage, and will occur in some rice areas. Therefore, this period is the key period for the prevention and control of third-generation rice planthoppers and rice leaf roller. The rice area that meets the standard must be controlled at the right time (lower age nymphs and larvae). In view of the emergence of resistance problems in rice “two-shifting†pests, local governments should pay attention to the rational selection of pesticides when promoting the use of high-efficiency, high-quality, and new-to-mouth pesticides, and vigorously promote pollution-free control technologies, and effectively control rice through the use of scientific control measures. "Two relocations" pest damage.
1. Prevention and control of rice leaf roller
In the Sanjiang Dong Autonomous County, the source of rice leaffolders has both local and foreign insect sources, thus increasing the difficulty of control. At present, the prevention and control of this pest is still mainly based on chemical control. It can be used to control 48% chlorpyrifos EC 70 ml or 1.0% avermectin EC 40 ml or 5% Ruijin Tetragenine 40 ml watered 45 to 60 kg. When applying pesticides, fields should be kept in the fields. If the control is lost, the larvae have reached the age of 4 or more, and when the rice leaves have become white, they can use 50 to 60 ml of fipronil to spray 45 to 60 kg of water. In order to improve the control effect, it is best to use a bamboo broom to sweep the seedlings before the application, so that the larvae are frightened to escape from the loquat leaves to increase the chance of direct contact with the liquid. Promote the installation of frequency-type insecticidal lamps in the field to trap and kill adult and other physical and biological control technologies to reduce environmental pollution in paddy fields and produce pollution-free food.
2. Prevention and control of rice planthoppers
2.1 Biological control. The first is to see ducklings released by stages, grabbed in stages, put a lot of insects, and put insects on them. The duckling was put in the early stage, the duck was enlarged in the middle period, and the duckling was put in the later stage. However, it should be noted that ducks should not be put in the area where the white leaf is dry to prevent the spread of germs; the use of spiders in areas where insects can not be put on ducks, because the ducks prey on both pests and prey on spiders; the second is not the use of methamidophos and other broad-spectrum high Poisonous pesticides are used to protect and utilize spiders and natural enemies to control the development of pest populations.
2.2 Chemical control. 300 to 500 or short-winged adult worms per 100 pupa at seedling stage, 800 to 1000 larvae per 100 pupa, or 10 or more short-winged larvae at the heading stage are listed as control targets. Tian, ​​Mu with 10% imidacloprid 15 g or 20% Kang Fu Duo 6 ~ 8 ml or 25% bufalin 50 g Duishui 45 ~ 60 kg spray control.
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