1. Rice aphid 1.1 Pest characteristics Rice aphids are divided into Chilo suppressalis, Chilo suppressalis and Rice leaf roller.
1.2 Hazard symptoms When the aphid is seriously damaged, it can cause white ears of rice.
1.3 Control method Spray with 13.5% Drilling Oil 1350 mL/hm2 or 15% Ray Diamond EC 1 350 mL/hm2, or 13.5% Duel EC 750 mL/hm2.
2. Insects 2.1 The characteristics of pests are commonly known as "scorpion", and white-backed planthoppers and brown planthoppers are more common.
2.2 Hazard Symptoms Whitebacked planthoppers are mainly responsible for the pre-growth of rice, while brown planthoppers mainly endanger the late growth of rice.
2.3 The control method can be achieved by using 25% chlorpyrifos WP 2000 times solution or 10% imidacloprid WP and 80% dichlorvos emulsifiable concentrate 800 times solution. 80% dichlorvos EC 2250 g / hm2 can also be used, diluted with appropriate amount of water, mixed with fine soil 300 ~ 375 kg / hm2.
3. Rice leaf roller 螟 3.1 Insect characteristics Rice leaf roller is also called leaf-necked worm, which is one of the main pests of rice. Every year, the southwestern airflow moves into the Central South Peninsula. The main migration period is from late May to mid June. The spawning period is mid-June, and the hazard period is from late June to late July.
3.2 Hazard symptoms The larvae are harmed. The larvae spin the rice leaves vertically into a tube, and feed the mesophyll to form white streaks. When the damage is serious, the rice leaves are white.
3.3 Prevention and control methods Prevention and control should be mastered in the larvae incubation period, the best effect, the third year of the general year prevention on June 20th. It can be used for the control of insecticidal double (concurrent treatment of heartworm) and insecticide.
4. The heartworm 4.1 The pests of the heartworm include three species of big cockroaches, cockroaches and mites, and the larvae of the cockroaches are reddish brown. The larvae of the mites are dark brown and have five vertical lines on the back of the body. The larvae of the larvae are yellowish. green.
4.2 Hazard Symptoms Larvae enter the plant during different growth stages of rice, causing the rice to dry and dry.
4.3 The control method can be sprayed with 900kg of water with 25% insecticidal double-water agent 3.75kg/hm2, or fine soil with 25% insecticidal double powder 15.0~22.5kg/hm2.
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