What are the latest pesticides used in citrus to control Spodoptera exigua?

Eradicating the larval host trees around the orange orchard can reduce the damage.

The peeled oranges were soaked in 30 times the liquid in 50% ethyloctathion emulsifiable concentrate for 3 minutes, and then hung in the citrus orchard to trap Spodoptera exigua.

Install black light, high-pressure mercury lamps, or frequency-vibration booby trap lights. The lamp is 2 meters high, and a wooden basin is placed under the lamp, which is filled with water and a few points of diesel or kerosene.

Fruit bagging. Early-maturing thin-skinned varieties should be wrapped in paper bags from mid-August to early September, and rust ticks should be controlled before bagging. Medium-ripening varieties can be harvested in mid to early October.

Pharmaceutical prevention and control. Spray 5 7% Baishude EC 1200 times or 2 5% Kung Fu EC 2000 3000 times and 2 5% Baode EC 2000 3000 times liquid.

Spodoptera exigua is a lepidopteran pest, and at present, the more effective is emamectin benzoate and pyrethroid pesticide compound preparations, but the cost is a bit high, and emamectin benzoate can be used with low content. Hope mine is helpful to you.

Green Power].

This is a very simple question, you go to buy the pesticide of insecticide or insecticidal double, which is cheap and effective, but remember, not too much, insecticidal double only needs half or two-thirds of the cover at a time (referring to 30 kilograms), or insecticidal single (25 grams of water and 45 kilograms of water). This is what all the growers here use. I'm engaged in agricultural materials.

Different types of noctuidae are planted with different pesticides.

For example, to control Spodoptera exigua, starting in late August, it is better to spray the canopy with 1000 1500 times of 50% Kulong EC (50% profenofos) or 1500 2000 times of 1500 2000 times of centaurex emulsifiable concentrate (cyfluthrin).

1. The harm of Spodoptera exigua.

Spodoptera exigua flies to the orchard at night as an adult to harm the fruit, and the adult worms are divided into three categories according to the structure and feeding ability of their mouthparts: 1. Fruits that like to eat healthy fruits: such as Spodoptera exigua, dead leaf moth, etc., the ends of their mouthparts are sharp and keratinized, and they rarely suck rotten fruits.

2. Healthy and rotten fruits and food: such as Spodoptera exigua, the ends of its mouthparts are sharp and hard. 3. Likes to eat rotten fruits:

For example, Spodoptera exigua and Spodoptera exigua have soft mouthparts and cannot pierce the peel. Usually when the citrus fruit is nearly ripe, the adult punctures the skin with its mouthparts and inserts it into the flesh to suck the juice. The prickly holes of the damaged fruit often show different harmful conditions, the worst is to cause the fruit to rot and fall off, the light is only a small hole on the surface, and the internal flesh is spongy or rotten, and the early harm is not easy to find, and it often causes rot in storage and transportation.

2. Citrus control method of Spodoptera exigua.

1. Avoid planting larval host crops such as cotton, fennel, tobacco, and peanuts in and around citrus orchards.

2. Frequency vibration insecticidal lamps are placed in citrus orchards to trap and kill adults (late June to September), which can reduce the number of fruit sucking Spodoptera exigua.

3. Hanging around the citrus tree with fragrant aromatic paper also has a good avoidance effect, generally 8 10 sheets of plants, hanging at night, retracting and sealing during the day, and can be used continuously for a certain time.

4. Before the citrus fruit is damaged or in the early stage of the damage, the melon can be cut into small pieces and hung in the garden to catch the adult insects at night. During the fruit damage period, the rotten fruit is piled up in the garden to attract adult insects to catch.

5. The prevention and control of pesticides can be sprayed with 800 times of 80% dichlorvos emulsifiable concentrate or 1000 1500 times of Baishude.

In the usual planting management process, appropriate topdressing of water-soluble fertilizer can supplement nutrients and enhance resistance.

Citrus leaf miners on fruit trees can be sprayed with deltamethrin EC or Uranus EC deltamethrin EC and diluted on the branches and leaves, once a week, 3 sprays. In early summer, you can do a good job of insect pest control in advance, and in the usual maintenance, the fruit trees can be properly pruned to improve the disease resistance of the trees.

Many people will breed citrus at home, if you find that there are citrus leafminers on the fruit trees, what medicine is used, you can dilute deltamethrin EC or Uranus EC or deltamethrin EC in proportion, spray on the surface of the affected leaves, spray once a week, and spray 3 times in a row to have a significant effect.

In fact, the adult insect of citrus leaf miner is not harmful, but its larvae have a strong destructive power, in summer and autumn when the temperature is high and rainy, it is the high incidence period of insect infestation, its larvae feed on the nutrient juice in the branches, leaves and fruits, if not timely, it will seriously affect the growth and yield of fruit trees.

In early summer, you can do a good job of insect pest control in advance, otherwise to the growth period of fruit trees, the number of insect pests will be greatly increased, in early summer you can grow earlier tender slightly removed, and properly control the number of times of watering and fertilizer, can achieve the effect of insect control, but also promote the germination of branch buds.

In the usual maintenance, the fruit trees can also be properly pruned, so that the plants can better receive light, ensure that the inner fruit trees have good air circulation, can improve the disease resistance of the trees, watering should not be too frequent, so as not to cause the soil to be too wet, easy to cause diseases, can be watered in accordance with the principle of seeing dry and wet.

<> control of Spodoptera exigua insects can be treated with chlorantraniliprole, chlorfenapyr, fenozazide, indoxacarb, Bacillus brevis, Spodoptera litura, Spodoptera exigua, polyhedrovirus, ethyl spinosa, etc.

<>Spodoptera exigua can be sprayed with contact pesticides, such as cypermethrin, kung fu ethrin, trichlorfon, chlorpyrifos EC, acemethamidophos EC, etc. Precautions: The effect of medication is better in the initial hatching larval stage, and the efficacy will be reduced after entering the older larval stage; The amount of liquid medicine should be sufficient, and it must be sprayed evenly and thoroughly when spraying.

Summary. Citrus tree leafminer moth danger can be used kung fu emamectin salt, tetrachlorantraniliprole, bollworm karyopolyhedrovirus, with indoxacarb, chlorantraniliprole, thuringiensis, Kangkuan and other alternating sprays.

Citrus tree leafminer moth danger can be used kung fu emamectin salt, four deficiencies of chlorantraniliprole, cotton bollworm karyotype polyhedrovirus, with indoxacarb, chlorantraniliprole, thuringiensis, Kangkuan, etc.

What is the best medicine for canker in citrus trees.

In the early stage of citrus canker, you can use 150-300 times of Liangguo Antan pure + 1000-1500 times of garlic oil to spray disturbing the fiber mist, it is recommended to use the drug 2-3 times, and use it once every 7 days or so, so that the slow imitation can effectively prevent and control the canker disease of citrus trees.

What medicine to use in the later stage.

The above drugs can be used, regardless of the early and late stages, but the early stage is better to prevent and treat this loss, the concentration of the drug is lower, the earlier the medication, the easier the ulcer disease.

The adult emergence stage and the young larval stage of Citrus leafminer moth are the appropriate control periods, and the control of adult worms can be carried out in the evening. To control larvae, it is advisable to use medicine in the afternoon on a sunny day. It can be sprayed with 10% dichlorophenothrin 2000 3000 times, or deltamethrin 2500 times, or 25% insecticidal aqueous agent 500 times (insecticidal and eggicidal effects are good), or 25% divitamin wettable powder 500 1000 times, or 5% imidacloprid emulsifiable concentrate 1500 times。Spray 1 time every 7 10 days, 3 sprays 4 times in a row.

Citrus leaf miner moth harms plants such as citrus, kumquat, lemon, February orchid, mandarin orange, four-season orange, rock sugar orange and so on. It is a serious citrus pest. Leaf miner larvae damage young shoots and young leaves, and in some cases can damage the fruit.

The larvae burrow under the epidermis of the leaves to feed on mesophyll tissue, creating a sinuous passage and leaving fecal threads in the middle. Therefore, it has the common name of ghost drawing symbol and drawing worm.

1. Agricultural prevention and control Erase the sporadic summer shoots and autumn shoots, so that they can be extracted in a unified and centralized manner, and cut off the source of insects. At the end of the adult oviposition, that is, when the number of eggs begins to decline, the autumn shoots can be left to reduce the damage of the autumn shoots. Half a month before the shoots, fertilizer and water management should be strengthened to make the shoots neat and shortened to the damage period.

2. Pharmaceutical control The initial stage of larval hatching is the appropriate period for prevention and control; Young trees start to control leaf miners when they are 1-2 cm from summer shoots, and then again after 15-20 days; The effective agents are: 20 carbosulfan 1000 1500 times, flufluthrin 1500 2000 times, etc.; The fruiting tree erases the summer shoots.

3. Protection and utilization of natural enemies mainly include parasitic wasps and lacewings.

Answer: If you want to control citrus leaf miners, you need to spray in time, you can use deltamethrin EC, emamectin, benzoate water powder powder, spraying should insist on spraying, about 5-7 days or so to spray the drug once, to use 2 to 3 times in a row.