Occurrence and control technology of onion downy mildew

Onion downy mildew is an important disease on the onion and the ocean, and when the conditions are right, the disease spreads rapidly and causes serious losses. In addition to harming green onions and onions, it also harms other plants such as garlic and leeks. Symptoms: Onion downy mildew mainly damages leaves and peduncles, primordial yellowish white or milky yellow larger infestation spots, spindle-shaped or oval-shaped, on which produce white mold, later turned pale yellow or dark purple. The middle and lower leaves became infected, and the diseased parts gradually dangled. The pseudostem is more broken and bent. Bulb disease, can cause systemic infection, this disease strains dwarf, deformed or distorted leaves, humidity, the surface grow a lot of white mold. Onion downy mildew mainly damages the leaves. The lesions with light onset were pale green and long oval, and when severe, they affected the first half of the leaves. The plants were yellow or withered, and the lesions showed an inverted "V" shape. Pedicel infected with the symptoms of the leaf, easy to die off by the disease. When the humidity is high, the disease minister produces a white to purple gray mold layer, that is, the cysts and sporangia of the bacteria. The bulb becomes soft after infection and the outer scales are rough or shrunken. The plants are dwarfed and the leaves are distorted. Pathogen and Pathogenesis: The disease is caused by the fungal infection of the flagellate of the flagellate genus Aspergillus. The pathogenic bacteria are mainly borne by oospore in the soil with the diseased body, and it is also possible for the mycelia to lurk in the bulb for wintering. In the second year, the water was splashed back and spread to the leaves for initial infestation. During the wet period, a large number of sporangia were generated in the diseased area, which mainly spread with the airflow and caused re-infection. Rainwater and insects can also spread, and whether seeds can be transmitted remains to be studied. It is cool and humid at night, warm during the day, heavy fog re-exposed, and soil moisture conditions are conducive to the occurrence and epidemic of the disease. Control methods: Use disease-free seed and seed treatment: select disease-free plots to retain seed, and sow new seeds with warm water at 50°C for 25 minutes and sow after cooling. Strengthen the management of farmland: Choose high-lying, well-drained, well-ventilated plots. Apply fertilizer and increase phosphorus and potassium fertilizers. Reasonable irrigation, not too wet onion. Discover the diseased plants and remove them in time. After the harvest, the diseased bodies were completely removed, concentrated treatment, and deep plowing were performed to reduce the source of bacteria. Chemical control: spraying at the beginning of disease prevention and control, spray once every 7-10 days, even spray 3-4 times, often the agent is 70% phosporium manganese zinc wettable powder 600-800 times, 25% metalaxyl Proplocarb WP is 500-1000 times, 50% WP is 2500 times, 70% is dried 500-700 times, and 72.2% is 700-1000 times.

Name: charmingly slender massage cream

Brand: curvaceous manifesto

Place of origin: Guangdong,Guangzhou

Capacity: 250g/350g/450g/

Price/CNY: 180 /250 /320

Packing: 72/60/48/ctn

Main Ingredients: Almond oil, castor oil, aloe vera oil, jojoba oil, squalane, vitamin E, grape extract, glycerol, xanthan gum, ivy, hyaluronic acid

Specifications :

It can quickly burn redundant fat,reshape slim figure,decompose stubborn gathered fat,consolidate slimming effect,avoid rebound,tighten flabby muscle,prevent arm muscle drop,with long term safety,fast slimming,free from cellulite and achieve perfect slimming effect.

Reduce the extra fat and flabby meat in abdomen, making the abdomen more smooth, more tightly, full of elasticity.

Direction: Apply a appropriate amount on the skin evenly and massage. Use three times a day.

Applications:

1. waist obesity over the age of 18,and women after childbirth urgently need to recover shape

2. works long time sitting in the office

Recommend the use parts of body: legs, arms

Best using time: bathing , before changing clothes, after exercise

Outer Slim Products

Slimming Cream, Slimming Gel, Slimming Essential Oil, Slimming Patch, Slimming Belt

GUANGZHOU XIANGGUO BIO-TECHNOLOGY CO., LTD. , http://www.slimmanufacturer.com