"Aphids"
If you talk about one of the insect pests that plants are most susceptible to infection with, and the most easily removed plant pest, it is certainly an aphid (greasy insect), which is a small insect that grows flesh and has different varieties and colors.
First, the characteristics of the hazard
1. Clusters of aphids directly suck plant leaves and fruits, resulting in lack of plant nutrients, stagnation or delay in tissue growth, and premature aging, resulting in poor fruit quality and low yield.
2. Aphid saliva contains certain amino acids and plant growth hormone, causing spots, wrinkles, galls, tumors, etc. in plant leaves, providing a favorable growth environment for aphids, while the effective leaf area of plants is reduced and photosynthesis is reduced.
3. When aphids suck and eat, they spread a variety of viruses, especially the citrus recession virus known as "fruit tree cancer", of which orange aphids have the strongest pathogenicity.
4. Aphids secrete honeydew, breed fungi, cause soot disease on leaves and fruits, affect plant respiration and photosynthesis, and honeydew is easy to attract ants, hindering or even dispersing pollinators and aphid predators.
Second, the law of occurrence
Aphids can occur all year round, but mainly occur in spring and autumn, of which the spring is the most harmful, when the temperature is above 12 degrees, the temperature of 16-25 degrees, humidity 50-80% of the environment is the most suitable living environment for aphids.
In general, aphids begin to multiply from March after warming up, April-May and September-October are the most harmful, summer high temperatures will hide in the shade of the field for more summer, until the autumn climate becomes colder after the degree of harm will gradually decrease, until November when the wintering hazards basically stop, in winter aphids will hide in the form of eggs or nymphs in the form of surface cracks and straw, gravel, weeds for overwintering, wait until the next year when the temperature is suitable for the spring and then continue to breed hazards, aphids can reproduce 10-30 generations in their lifetime, And the generations are stacked and accumulated. In addition, aphids have strong physiological characteristics of tenderness, sweetness, yellowing and lighting.
3. Comprehensive prevention and control
1. Prevention and control by agricultural and physical methods
Carefully clear the garden in winter, eradicate weeds in time in spring, spray pesticides to eliminate aphids on overwintering hosts, and reduce the source of insects.
Aphids prefer yellow and can be trapped by yellow sticky worm boards; silver gray has a tendency to avoid aphids, which can be used in facility vineyards.
In the management of crop planting, it is necessary to apply as much high-quality organic fertilizer or decomposed farm manure as possible, minimize the use of large chemical fertilizers, especially not too much use of nitrogen fertilizer, which is very helpful for preventing aphid hazards. Recommended use of [bio-organic fertilizer + microbial agent]
2. Biological control
Protect and use predators, such as predatory ladybugs, grasshoppers, spiders, aphid cocoon bees, insectivorous bugs, etc.
3. Chemical control
It can be used to spray control alternately [Jingbo Jinmir] or [thiamethiox isopropylvir + pyrizolinone] to prevent aphids from developing resistance. When spraying aphids in the field to control aphids, you should choose the two time periods of 9-11 a.m. or 3-5 p.m. on a windless sunny day, and when spraying, you should focus on spraying aphids that are easy to hide near the ground, the back of the leaves, the new leaves, the young shoots, the young stems, the leaf slits and other parts, and the spraying must be comprehensive and meticulous, and the amount of spraying liquid is sufficient, and it is necessary to be comprehensive and thorough, and it is necessary to be comprehensive and not heavy.
【Kyobo Kimmel】
1. In China, it is the high content of A vitamin salt that registers the tank bean thrips, the tank bean pod borer and the cabbage moth, the honeysuckle inchworm, and the cotton bollworm
2. China's green food production materials certification products, the first choice for pollution-free crops
3, micro emulsion, safe and environmentally friendly, do not hurt flowers and do not hurt fruits
4. Unique addition of thrips induction aids, stronger lethality and longer lasting
5. Kill the westflower thrips and palm thrips, and control lepidoptera pests such as the grassland nocturnal moth, the rice rice longitudinal leaf borer, the beet noctuce moth, and the twill moth
【Thiamethox, isopropylvir + prazidone】
1. It has a good control effect on aphids
2. It has the dual effects of touch killing and gastric toxicity, stopping eating after 4-6 hours after contact; irreversible paralysis knockdown occurs within 6-12 hours; and peak death is reached in 24-36 hours.
3. Long effectiveness, good permeability on the surface of plants, good adhesion.
4. It is more resistant to rain washing, and after use, the agent effectively penetrates into the leaves of the plant to form a secondary insecticidal peak, and the insect eggs are killed at the same time.
【Disclaimer】
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