Fig disease is very important
2023-02-23 09:06:27
The epidemic disease is the main disease of fig in recent years. It occurs widely and has serious damage. In the epidemic years, 80% to 90% of the fruits will be rotted and damaged, and a large number of leaves will wither.
Harmful symptoms
The disease mainly damages fruits, shoots and leaves, and also invades shoots. The victim initially developed water-stained round lesions on the surface of the fruit and then rapidly expanded with slightly concave and irregular rot lesions. When the lesion expands to more than one-half of the whole fruit, the fruit will fall off. After the disease falls, it shrinks into a stale fruit.
When the new shoot is damaged, it will produce a water-stained brown spot. When the lesion circles around the tip, the shoot will die and die.
The law of incidence
The germs used oospore to survive winter in host disease tissues on the ground. In the spring and summer of the second year, the shoots and fruits were spread by the rain to the ground, and germination and intrusion began to harm. Afterwards, sporangia and zoospores are produced on the lesions, which are repeatedly infested by the rain-fighting medium until ovi- spores form in the fall and overwinter. Where the orchards are low-lying, poorly drained, the trunks are low and bushy, and the branches are dense and the incidence of canopy closure is heavy.
Control methods
1. Clean the pastoral area and eliminate the sources of overwintering bacteria. In the spring, we will do a good job in the clearing of the garden, cut away dead branches, sick and broken branches, clean up the ground defoliation and diseased tissues, and burn them in a concentrated manner. Spray 3 Baume degrees to 5 Baume degrees of lime sulfur.
2. Pharmacy protection. From late May onwards, until 20 days before fruit harvest, spray once every 15 days to 20 days. The agent can be used as 40% of the mold net WP 300 times, or 50% of the WP wettable powder 800 times, or 58% of the DMP WP 800 times; 1:1:200 Bordeaux mixture is also available Better control effect, can be protected with Bordeaux fluid in the early stage, and controlled with Rhizoctonia after the onset. In addition, it can also be treated with 50% methicillin wettable powder 400 times to 500 times.
3. Strengthen field management and do a good job of trenching drainage. Reduce the humidity in the field, remove dense shoots, improve the result area, and improve the ventilation and light conditions of the crown.
Harmful symptoms
The disease mainly damages fruits, shoots and leaves, and also invades shoots. The victim initially developed water-stained round lesions on the surface of the fruit and then rapidly expanded with slightly concave and irregular rot lesions. When the lesion expands to more than one-half of the whole fruit, the fruit will fall off. After the disease falls, it shrinks into a stale fruit.
When the new shoot is damaged, it will produce a water-stained brown spot. When the lesion circles around the tip, the shoot will die and die.
The law of incidence
The germs used oospore to survive winter in host disease tissues on the ground. In the spring and summer of the second year, the shoots and fruits were spread by the rain to the ground, and germination and intrusion began to harm. Afterwards, sporangia and zoospores are produced on the lesions, which are repeatedly infested by the rain-fighting medium until ovi- spores form in the fall and overwinter. Where the orchards are low-lying, poorly drained, the trunks are low and bushy, and the branches are dense and the incidence of canopy closure is heavy.
Control methods
1. Clean the pastoral area and eliminate the sources of overwintering bacteria. In the spring, we will do a good job in the clearing of the garden, cut away dead branches, sick and broken branches, clean up the ground defoliation and diseased tissues, and burn them in a concentrated manner. Spray 3 Baume degrees to 5 Baume degrees of lime sulfur.
2. Pharmacy protection. From late May onwards, until 20 days before fruit harvest, spray once every 15 days to 20 days. The agent can be used as 40% of the mold net WP 300 times, or 50% of the WP wettable powder 800 times, or 58% of the DMP WP 800 times; 1:1:200 Bordeaux mixture is also available Better control effect, can be protected with Bordeaux fluid in the early stage, and controlled with Rhizoctonia after the onset. In addition, it can also be treated with 50% methicillin wettable powder 400 times to 500 times.
3. Strengthen field management and do a good job of trenching drainage. Reduce the humidity in the field, remove dense shoots, improve the result area, and improve the ventilation and light conditions of the crown.
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