[Hazardous symptoms] Cinnamomum cinnabarinus extracts sap from the back of the vegetables on the leaves of the nymphalus cinnamomea to increase transpiration of the leaf surface, discolor the chlorophyll, and inhibit the photosynthesis, thus making the leaves become red, dry, shed, or even the whole plant withered. Yield and affect quality.
Shape recognition
1 Female adult carcass length 0.42-0.51 mm, width 0.26-0.33 mm. The back is oval. Body color is generally dark red or red, and often varies with the type of host. There are two dark brown long spots on both sides of the body, extending from the beginning of the head to the back of the abdomen, sometimes divided into two blocks, the front block is slightly larger.
2 Male adult turtles were 0.37-0.42 mm in length and 0.21-0.23 mm in width. Small size, red or orange red. The back is diamond-shaped, with a round head and thoracic front. The tip of the abdomen is slightly pointed.
3 eggs 0.13 mm in diameter, spherical. It is colorless and transparent when it is first produced, and becomes pale yellow to dark yellow later. It is slightly red before egging.
4 Cub is about 0.15 mm long and 0.12 mm wide. The body is nearly round, transparent in color, darkens green after feeding. Full 3 pairs.
5 If it is about 0.21 mm long and 0.15 mm wide. 4 pairs. If females are divided into pre-fistula stage and post-paralysis stage, if the male does not have a posterior palatal stage, he will have 1 episode of skin than the female.
[Occurrence of the law] When the temperature rose to 10°C in the early spring, cinnabarin began to multiply. Intensive, if relying on crawling, wind and rain, and agricultural operations for migration and proliferation. The cinnabar leafhopper is mainly male and female. Parthenogenetic reproduction is also possible. Spawning eggs, prolific in the back of the leaves. A female eel can spawn 50-100 grains. At the optimum temperature, it usually takes 7-9 days to complete a generation. High temperature and low humidity are conducive to reproduction. When the temperature was between 25°C and 28°C, and the relative humidity was 30-40%, the fecundity and survival rate were the highest. Temperature below 20 °C, relative humidity above 80%, is not conducive to reproduction. The temperature exceeds 34°C and the breeding stops. In early spring, the temperature rose rapidly, and the activity of Cinnamomum cinnamomea was early, the reproduction was quicker, and the damage to vegetables was heavier.
[control methods]
1 Agricultural control. Weeds are removed from the sheds, and after the harvest, the stubble leaves are removed in time for manure removal or destruction. Avoid excessive drought, timely irrigation, and pay attention to the combined use of nitrogen, phosphorus, and potassium fertilizers.
2 biological control. There are many natural enemies of the cinnabar leafhopper, and there are species that have application value such as ladybugs, grasshoppers, spiders, and thin skin mosquitoes. Conditions can be introduced to release or field protection and utilization.
3 chemical control. At the stage of the occurrence of spotting in the field of melons, prompt treatment should be conducted so as to avoid the outbreak of insect pests. In recent years, due to the use of organophosphorus pesticides in successive years, leaf aphid has developed resistance. It is necessary to frequently use chemical pesticides, or to use compound potentiators and some novel special effects agents. At present, 40% of chrysanthemum EC is sprayed with 2000-3000 times of liquid spray, 20% of compound Liuyangmycin EC is 1000-1200 times of liquid, 73% of Cryotex is 1000 times of liquid, and 5% of Nissoline EC 3000 Times of liquid, 25% extinction Meng Qian WP 1000-1500 times liquid, quercetin wettable powder 1000 times and so on. Sprayed with 3000 times of 50 Tolk Emulsion, the effect is also very good. In addition, it is also possible to use 80% dichlorvos EC 1000 times and other organophosphorus pesticides in rotation with other agents.
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