1. Agricultural control (1) Disposal of rice piles. The rice pile is the only place where the larvae of the rice borer are wintering. Before autumn, plowing the soil and burying the rice pile into the soil can eliminate some larvae. (2) eliminate the source of insects. The green manure retention field is the main source of insects for the overwintering larvae of S. indica, and should be selected as a green manure-retaining field. (3) Irrigation. Winter fields and green fields can be used to infuse horse water to kill most of the overwintering larvae. The winter plowing field timely irrigates the spring and floods the rice piles for 7 to 10 days, killing the overwintering larvae and pupae. (4) Breeding avoidance. In terms of cultivation techniques, we must focus on three links: that is, reforming the rice cultivation system in light of local conditions, rationalizing the layout of cornices, avoiding mixed planting, and reducing the “bridge fields†of the upper and lower generations of locusts. It is necessary to adjust the planting period of rice to stagger the dangerous growth period and the incubation period of ants that are susceptible to damage, in order to avoid or reduce the damage. To improve the purity of seeds, apply reasonable fertilizers, and strengthen the management of water slurry, it is the consistent growth and development of rice that can all play a role in alleviating the damage.
2. Chemical control (1) Prevention of dry heart. According to the length of time the rice meets the ants and the length of the incubation period, the number of prevention and control decisions. The meeting time was within 10 days and the application was performed 1 to 2 days before the peak of anthill hatching. Meet the time of more than 10 days need to use the drug 2 times, the first time in the egg hatching initiation period of application, every 5 to 7 days and then the second drug. According to the density of egg mass in the field, it is determined whether it is a rule or a rule. More than 30 blocks per mu were used for field control, and less than 30 plots were “grassed and driedâ€, that is, several days after the hatching peak, the plants were sprayed around the infested blue and dry hearts. (2) Control white spikes. In the egg incubation period, the break period is the best time to control the white spike. According to the principle of “early break early medication and late break medicationâ€, it is usually applied once at 5%~10% of the ear opening, such as the occurrence of aphids, long incubation period of ants, or long earing period of rice. , need to increase the number of prevention and control, the interval between two applications of 4 to 5 days.
Key prevention and control technologies: Adhere to the strategy of reducing the number of pressurizes in the first generation, and adjust the sowing date, adjust drug types, and avoid comprehensive control of flowering cultivation. To prevent and cure the first and second-generation dead hearts, you can use chlorpyrifos, avermectins, insecticides, and fipronil and try to avoid the use of triazophos (which will affect the ecology of paddy fields and stimulate the proliferation of planthoppers). The damage degree of three generations of S. japonica depends on the degree of coincidence of the larval hatching peak and the flowering stage of rice. When the degree of anastomosis is high and the amount of insects is large, triazophos and other agents should be used for prevention and treatment at the hatching peak of egg hatching period. Fipronil and other drugs have poor efficacy against the three generations of S. bubula and should not be used. Sanhuayu should stop the use of these two drugs in areas where resistance to nematicides such as dimehypo, insecticidal and other insecticides has already developed.
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