The commonly used Pipette kits are mainly composed of a pipette and a pipette tip. The pipette tip is a single empty 1000 ul pipette tips,200ul pipette tips,10ul pipette tips,low retention pipette tips Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yongyuecultureplate.com
The locusts occurred from April to September, and the insects were severe from April to June. They spread faster before and after the "living summer", especially in the rainy days. It has many types and shapes, and its body color is yellow, green, black, brown, gray and so on. When it is harmful, it gathers on the soft and juicy parts of the leaves and stems, causing the leaves and growth points to curl up, the growth stops, and the leaves turn yellow and dry. There are many medicinal plants that are harmful to aphids, and almost all medicinal plants are harmed by them. Control method: thoroughly remove weeds and reduce their chances of migrating; use 40% dimethoate 1000-1500 times dilution or 1000-1500 times dilution of chlorpyrifos (killing lingen) in the occurrence period, even spray more Once, until it is killed.
The scorpion worm has two kinds of oyster shells and wax mites, which mainly damage the medicinal materials such as Tianqi. It usually starts in June every year. After heavy rain, it climbs from the ground and damages the stem. After July, it damages the flower shaft and the petiole. The damage is serious between August and October. The worm body attaches to the stem, the flower shaft, and the small drug shaft to absorb the juice. After the damage, the plant grows poorly, and the small flower is sallow. When it is serious, the dried flower and the dried fruit are dried off. Control method: 1 In the period of pest occurrence, strengthen the inspection, and find that there are worms on the plant to kill the insects by hand; 2 After the insects in Tianqiyuan, use 600-800 times dilution of polychlorin in the young age of the scale insects Spraying; 3 When the pests occur seriously, spray the victim plants and worms with 1000 times dilution of dichlorvos, spray once every 5-7 days, and spray 2-3 times continuously.
The ground tiger is also known as the silkworm and the silkworm. It occurs mostly in the rainy and humid April-June. The larva feeds on the stems and leaves, biting off the tender stems, causing the lack of seedlings and ridges; when it is slightly larger, it is drilled into the soil, and it comes out at night, biting the roots and seedlings, and destroying the growth of the plants. There are many medicinal plants that are harmful, such as medlar, angelica, atractylodes, platycodon, habitat, and yam. Control method: manure must be piled at high temperature, fully fertilized and then applied; from the end of March to the beginning of April, weeding off weeds, removing litter, eliminating wintering larvae and cockroaches; using 75% phoxim emulsifiable concentrate according to the amount of seeds % seed dressing; check the victim seedlings before sunrise, excavate and kill; when the hazard is serious, use 75% phoxim emulsifiable concentrate 700 times solution for hole filling, or spray 90% trichlorfon 600 times solution.
The beetle was unearthed in May, and lays eggs in the epidermis at the upper end of the shoot. The larva first moves in the epidermis, then drills into the xylem and feeds on the base. After autumn, it drills to the base of the stem or the roots overwinter. After the plant is damaged, it gradually ages and dies, and even dies. Control method: When the adult is unearthed, inoculate the flower pier with 80% trichlorfon 1000 times solution; in the period of spawning, spray once every 7-10 days with 50% phoxim EC 600 times, or 50% phosphorus amine emulsifiable concentrate 1500 times the liquid, several times in a row; found the insect branches, cut and burned; put the cotton wool soaked in 80% dichlorvos into the wormhole, seal it with mud, poison the larvae; or insert a new wormhole with steel wire to assassinate.
The red spider's high temperature and dry climate from July to August is beneficial to its breeding, with many types, small and red. More concentrated on the back of the plant to absorb juice. The affected leaves are reddish yellow at the beginning, and when the late stage is severe, the whole leaves are dry, and the flowers and young fruits are also affected. The insect has a strong fecundity, and many medicinal plants are affected by it, such as Sanqi, Angelica, Shengdi, Clam, Saffron, Chuanxiong and so on. Control method: The occurrence period can be sprayed with 50% dicofillin 1500-fold dilution or 25% insecticidal 200-300 times dilution, or sprayed with 40% dimethoate 1500-fold dilution.
The hibiscus moths first plucked into the twigs from early July to early August, and then turned the stalks and the branches of the main branches slightly. The branches were often pierced, and the surrounding area was dark brown, causing breakage. In severe cases, the upper branches Withered. Control method: hang black light to trap adult insects; timely cut off the insect branches, burned intensively; spray with 90% trichlorfon 800 times, once every 7 days, for 2-3 consecutive times.
The borer worms occur 4-5 generations throughout the year, and the larvae penetrate into the leaves, roots, stems and flower buds of the plants, which seriously affects the yield and quality. Control method: In the adult period, choose the windless night to use the light to trap; the egg stage and the larvae are hatched at the end of the plant before using the 90% trichlorfon 500 times or 40% omethoate EC 3000 times.
The moth is also known as itchy. From early June to September, the larvae harm the leaves and eat holes and nicks. The larvae of the first instar are grouped, and when the damage is serious, the saplings die. Moths have phototaxis. Control method: winter and spring to knock on the insects; spray spore content of 10 billion / gram of blue worm powder 500 times solution.
The ruler is also known as the bridge bug. May-September occurs, larvae damage branches, leaves, and buds, causing a reduction in production. Control method: After entering the spring, excavate the earthworm within 1 meter around the plant; in the early stage of larvae, weeding and killing larvae, or spraying 2.5% of the fish vine cream 400-600 times liquid; or spraying with dichlorvos and trichlorfon 1000 times Kill (stop spraying at the flowering stage).
Huang Shou melon harms leaves, shoots and roots. The larva damages the roots in the soil, causing the underground part of the plant to die; the adult bites the leaf into a nick, affecting growth. Control method: When the adults lay eggs in May, use 5 kg of chaff and wood chips, mix 0.5 kg of diesel oil, spread around the plants to prevent adult eggs from spawning; artificially kill adult insects in the morning, when the adults are harmful, they can spray 90% of the enemy. Hundreds of 1000-2000 times dilution or 80% dichlorvos 1000-1500 times liquid.
The southern part of the nickname is the old female worm, the northern name is the walnut worm, and the adult is called the chafer. Adults and larvae can be harmful, and larvae are the most serious. Larvae are common underground pests, mainly biting roots and underground stems, and also biting on the ground stems. Adults mainly damage the aerial parts. Many medicinal plants are harmful, such as Ophiopogon japonicus, Chinese yam, Achyranthes, Angelica, Codonopsis, Salvia, Peony, Ginseng, Radix Pseudostellariae, Fritillaria, and safflower. Control method 1 In the evening and evening, use light to trap adult insects; 2 During the occurrence period, use 90% trichlorfon 1000 times or 50% e605 emulsifiable oil 1000 times dilution to water the cave; 3 with 25 grams of chlordane cream mixed with fragrant wheat bran 5 kg plus The right amount of water is used as a poison bait, and it is scattered around the plant in the evening to trap.
The locusts and larvae of the thrips harm the stems and leaves of the medicinal materials such as the cockroaches. They are seriously endangered during the autumn drought. They mainly suck the juice of the tender stems and leaves and affect the growth. In severe cases, the young stems and leaves are atrophied and dry, and the old leaves are irregularly curled. Finally, the plants gradually dry up and cause the roots to rot. Control method: 40% dimethoate, or 50% phoxim 1500-fold dilution or 25% imipenem EC 1000-fold dilution in the onset period, spray once every 20 days, continuously spray 2-3 times.
In the spring and autumn, the golden worms are the peak of the damage, and the most serious in spring. It also harms the aerial parts of the plants, feeds on the germinating seeds, harms the roots, causes the lack of seedlings, root rot and the plants die. Control method: 250 ml of 50% phoxim EC, poured into the water hole, 500 kg per acre.
The clostridium worms occur in the young plant stage, and the worms are wrapped in silk to damage the stem tips and young leaves. Control method: 50% dimethoate emulsion 1000 times liquid spray (should be carried out in sunny afternoon), once every 2 days, 2-3 times in a row.
The fruit fly, also known as the heartworm, occurs from May to September. Adults are like small flies. They lay eggs on flower buds. The larvae are buds that eat buds and phlegm in the flower buds. The buds are seriously damaged. Control method: spray 1500 times liquid of trichlorfon or dimethoate during adulthood.
蟋蟀 From April to May, often break through the hole at night to bite off new shoots and shoots, causing lack of seedlings in severe cases. Control method: fill the hole with 800 times liquid of trichlorfon, and then seal the hole with mud. You can also use a small amount of fresh leaves to cover the hole of the trichlorfon powder, and the killing effect is very good.
Pink butterfly is also known as cabbage caterpillar. May-September occurred. The larvae bite the leaves, causing holes and gaps in the leaves. Control method: 90% trichlorfon 800 times solution in the larval stage.
Cavity reservoir; the pipette uses the principle of air displacement and controls the maximum displacement of the piston by rotating a screw with an ultra-fine thread
displacement, and then control the amount of liquid suction. There are the following problems when using the above kit for suction: 1. The suction volume is controlled by the pipette
After the pipette is sterilized or used for a period of time, it is easy to cause "hidden" failures, which cause the operator to be difficult to detect.
The actual suction volume is inaccurate, and it needs to be adjusted frequently, and the operation is cumbersome and time-consuming; 2. To improve the pipetting accuracy, the operator's
The operation requirements are high, and it is easily affected by factors such as the suction speed, the depth of the tip below the liquid level, and the inclination angle of the pipette.
The actual suction volume will be heard; 3. The actual suction volume will be affected because the suction head cover is not tight and leaking, and it will not be easily detected; 4.
When performing experiments that require high accuracy, such as analysis, in the operation of equal volume aspiration of liquids with different densities, the actual
The actual suction volume will be affected by the density itself; 5. In order to improve the accuracy, this type of pipette needs to carry out high
Cost-optimized design results in extremely high pipette costs.
Method for controlling common pests of medicinal plants
Medicinal plants have many pests and are very harmful. It is an important measure to ensure and improve the yield and quality of medicinal materials. At the turn of spring and summer, it is the most active stage of various pests. The common pests and their control methods for Chinese herbal medicine cultivation are introduced as follows:
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