Prevention and treatment of diseases and insect pests, prevention and treatment of three insect pests and two diseases

Although Ziyunying is easy to breed, if you do not pay attention to the breeding methods, it is not only difficult to see purple flowers, but also may lead to plant death, because improper maintenance will make Ziyunying infected with diseases and insect pests. So what are the other common diseases and insect pests? Today we will learn about the prevention and control of diseases and insect pests of Ziyunying.

Prevention and control of diseases and insect pests of Ziyunying

I. Common insect pests

1. Aphids

It is one of the most harmful pests to plants in the world. it usually appears on the leaves of Artemisia mandshurica and feeds on the juice from the mesophyll tissue. The damaged leaves will wither and turn yellow, and the overall growth of the plant will become weaker. Aphids will also spread to other plants with wind and rain, and the whole piece will be damaged if it is not controlled in time.

Prevention and control methods: omethoate or dichlorvos 1000 times liquid spray can be used to control it. After that, it is necessary to strengthen maintenance management to avoid excessive temperature and humidity.

2. Leaf miner

It will hide in the leaf tissue of Ziyunying to find food, leaving white irregular stripes on the leaves, that is, leaves left by leaf miners, the chlorophyll of the damaged leaves will be broken down, resulting in reduced sugar content, thus making the plant leaves yellow, and the seedling stage may also lead to dead seedlings.

Prevention and control methods: in the breeding method of Ziyunying, we should pay attention to scientific and reasonable watering, usually pay attention to the removal of weeds to reduce insect sources, when there are more leaf miners, you can spray 1000 times of dimethoate EC, 1500 times of dibromophosphorus EC, and so on.

3. Thrips

In the pest control of Ziyunying, thrips refer to the order Thysanoptera, which mainly sucks the juice or fungi of Thysanoptera, so when thrips appear, they may also cause some diseases. and it shows that the environment is relatively dry and the humidity is 40-70%.

Prevention and control measures: usually pay attention to remove fallen leaves, dead branches and so on, pay attention to do not let Ziyunying lack of water soil is too dry. Thrips need to be sprayed more often, and 2000 times the liquid spray of imidacloprid wettable powder is generally used.

Second, common diseases

1. Sclerotinia disease

The accumulation structure of mycelium will appear in the affected part of Ziyunying, indicating that there will be sclerotia of different color and size, which will cause the damaged part of Ziyunying to decay, hollow in the stem, and eventually the plant will dry up and die, which is one of the most harmful diseases of many plants.

Prevention and control measures: strengthen management, select excellent varieties when sowing, and it is best to select seeds with 10%-15% salt water or ammonium sulfate water before sowing. After the onset of the disease can be sprayed with 70% mancozeb wettable powder 500 times.

2. Powdery mildew

Usually, powdery mildew spots appear on the front and back of the leaves, and the spots continue to expand and connect into one, then the leaves are covered with white powder, the leaves will be yellowish brown and dry, and disease spots will also appear on the stems and petioles.

Prevention and control methods: in the breeding method of Ziyunying, we have emphasized that we must dry the seeds before sowing, in order to eliminate miscellaneous bacteria and reduce the incidence of powdery mildew, and when the disease occurs, it is necessary to spray 50% carbendazim 800-1000 times to the leaves.

How to control diseases and insect pests of Artemisia mandshurica (scientific name: Astragalus sinicus L.) is a leguminous biennial herb, creeping much branched, up to 30 cm high, odd-pinnate leaves, petiole shorter than leaf axis; stipules free, leaflets Obovate or elliptic, apex obtusely rounded or retuse, base broadly cuneate, subglabrous above, scattered white pilose below, racemes, flowers umbellate. Total pedicel axillary, bracts triangular-ovate, pedicel short; calyx campanulate, calyx teeth lanceolate, Corolla purplish red or orange, flag petal Obovate, limb oblong, pod linear-oblong, seeds reniform, chestnut brown, flowering from February to June and fruiting from March to July.

How to control Ziyunying diseases and insect pests: Ziyunying likes to be moist, afraid of both drought and waterlogging. The whole growth period should ensure that the soil has a certain humidity, so that the field can be irrigated; after the late rice harvest, cross ditches and ring ditches should be opened, the ditches are connected, the heavy rain does not accumulate water, and the field is dry; in case of drought, the soil turns white, moist soil should be irrigated with "horse race water" in time to meet the growth requirements of Ziyunying. Proper topdressing of Ziyunying, especially in paddy fields with poor fertility, should be topdressing 1 Mel fertilizer twice, "small fertilizer and big fertilizer" can significantly increase the yield of green manure. Fertilization can be divided into three stages: base fertilizer, pre-winter fertilizer and spring fertilizer. The diseases of Ziyunying include Sclerotinia sclerotiorum, powdery mildew, thrips, leaf miner, aphids, bean pod borer, Spodoptera litura and so on. Prevention and control of main diseases and insect pests of Ziyunying

The disease of Ziyunying is mainly powdery mildew, if powdery mildew is found in the growing period (especially in farming).

Control method: 1000 times of carbendazim or topiramate can be sprayed, or 0.4 degree stone sulfur mixture can be used.

The main insect pests are aphids, thrips, leaf miners and so on.

Control method: every 667m2, imidacloprid 10g 20g, or 90% trichlorfon 150g, water 30~50kg spray, or 40% dimethoate emulsion 1000g 1500x spray control.