Banana blast caused by common diseases of canna

Canna

Canna, the new favorite of the green belt, is easy to catch banana blast in the case of improper conservation and management, and early detection of early treatment is not a big problem. If the disease is delayed, it will not only affect the landscape value, but also consume a sum of money. So what should canna do when it is infected with banana blast?

First, symptoms

Leaves, stems and leaf sheaths can all be killed. Most of the leaf lesions are fusiform, a few are oval, brown, the edge of the later stage is dark brown, the center is grayish white or gray brown, often with concentric rims. When the humidity is high, there are gray mildew on both sides of the disease spot, that is, the fruiting body of the pathogen. In severe cases, the disease spot fused into irregular large spots, local or whole leaves withered. When the leaf sheath and stem are damaged, the diseased tissue sinks, forming long or irregular brown spots and gray mildew layer.

II. Pathogen

Pyricularia cannaecola Hashioka is called Pyriosporium of Banana, which belongs to the subphylum of semisciferous fungi. The conidiophores are mainly on the back, slender, straight, apical knee-bending, olive to olive-brown, smooth surface, 55 ~ 161 × 3 ~ 5 (μ m); sporogenous cells are multi-budding, symmetrical extension, and retain short cylindrical odontoid processes after spores fall off. The conidia are solitary, inverted pear-shaped, with a slightly prominent navel at the base, nearly colorless to light olive color, smooth surface, 3 cells, no constriction at the melting membrane, and the size is 17m 29 × 6m.

III. Routes of transmission and conditions for onset of the disease

The pathogen overwintered on the diseased remains with hyphae and conidia, and the conidia produced in the next spring were transmitted to the host by wind and rain for primary and re-infection.

IV. Prevention and control methods

1. Pay attention to clean the countryside and concentrate on burning the sick and disabled bodies.

two。 At the initial stage of the disease, 50% carbendazim wettable powder was sprayed with 1000 times or 25% carbendazim EC.

What medicine is used for ginger plague? (picture of ginger plague)

The epidemic period of ginger blast is long, and it usually begins to occur in June, and it is serious in the high temperature season from 8mi to September, so what medicine is used for ginger blast? (picture of ginger plague).

What medicine is used for ginger plague?

1. The spread of ginger blast in ginger seedlings can be effectively controlled by alternating cultivation of flood and drought. The land where ginger is grown should be relatively high-lying and easy to drain and water.

2. Increase the amount of phosphate and potassium fertilizer, if the conditions permit, it can cover rice straw or straw between rows to prevent the occurrence of ginger blast.

3. The most effective means is to carry out prevention and control from the root. When selecting varieties, we should select some varieties with strong disease resistance according to some local planting conditions.

4. During the growing period of ginger, after the rainy day, the field should be drained in time to prevent flooding of ginger.

5. If diseased seedlings are found, they should be removed from the field in time. In order to prevent the spread of germs in the field, all the seedlings of half a meter around the diseased seedlings should be dug up. Sprinkle the soil with lime and bury the hole with a clean sterile body.

6. Fungicides can be selected in time to control ginger.

How to prevent and cure ginger blast

In the process of ginger growth, ginger blast is a very common disease. Ginger blast, also known as ginger rot, is a widespread, epidemic and fast-spreading destructive disease, which has become a key problem that seriously restricts ginger production in many places. In production, a variety of agricultural measures are mainly taken in advance, supplemented by chemical control, which can be effectively controlled. The following editor shares with you how to prevent and cure ginger plague.

1. Control and spread of ginger blast

① found that the diseased plants were pulled out in time, and the healthy plants within 0.5 m around the diseased plants were removed, and the bacteria-carrying soil was also dug up.

The acupoints of ② and its surroundings were disinfected with hydrated lime at a dosage of 1kg per acupoint, or bleached 0.125kg was used at each acupoint, and then filled with sterile soil.

two。 Root irrigation control of ginger blast

① was irrigated with 90% Jiangxianning 300x liquid, or 3% Kecang wettable powder 600800 times liquid, or Kangfa wettable powder 400-800g per mu with water, or 72% agricultural streptomycin soluble powder, or 3000-4000 times solution of streptomycin sulfate, etc.

② was used alternately with 0.5-1.0L root solution per hole, once every 7-10 days, and 3-5 times continuously.

③ can also be irrigated with Yekuning, copper oxychloride, Bordeaux solution, copper succinate and other chemicals.

3. Chemical control of ginger blast

At the initial stage of the onset of ①, use 20% Ye Kuning 1300 times liquid; or 30% copper oxychloride 800x solution; or 100 Bordeaux solution; or 50% copper succinate wettable powder solution, foliar spray control.

② agents were used alternately, 75-100L per mu, once at intervals of 5-7, and 2-3 times continuously.