Reader Zeng Wenyan: When I first arrived on the National Day, I received flowers from friends. However, I had just raised them for three or four days. There were a lot of flowers in the room. This situation often occurs when the bottles are raised and I hope to learn more about the maintenance of bottled flowers.
Something is wrong with your speech. Reporter: Ms. Zeng, how are you?
Many families in the festival bought flowers or received flowers from relatives and friends for a festive atmosphere. There are many learnings about how to care for fresh cut flowers. The experts on flower cultivation of the Municipal Bureau of Parks gave answers to your questions.
1. Identify grape black spot disease, also known as dwarf disease, the common name "black spot", is an important disease of grapes. The main performance symptoms are:
(1) After the victim's injury, a small brown spot of the needle was found at the early stage after injury, and then developed into a round spot with a tan diameter of 1 to 4 mm, and the middle part became gray. Finally, the diseased tissue became dry and hardened and fell into a perforation. The young leaves are often distorted after being victimized and shrunk to deformity.
(2) The fruit is not susceptible to the disease after being stained. In the early stages of the green sensation, brown round spots were produced. The middle spots of the round spots were gray and white, slightly concave, and the edges were reddish-brown or purple like "bird eyes". Multiple small lesions combined to form large spots; later lesions hardened or cracked. The disease is small, sour, and has no food value.
(3) New shoots, petioles, pedicels, and tendrils initially produce round brown dots, which later turn grayish black. The central depression becomes a dry, ulcerated ulcer with severe onset of dryness or death.
2. The onset of pathogens The pathogenic bacteria in the orchard reside in the diseased tissues in winter, and the lesions on the mother and tendrils are mainly caused by the pathogens. Conidia are produced when environmental conditions are appropriate for the following year. Conidia spread by wind and rain, the initial victim is new shoots and young leaves, after the infection of fruit, tendrils and so on. The invasive period after spore invasion is 6 to 12 days. The disease usually starts after the temperature rises from late May to early June, and the onset of the disease occurs from mid-June to early July and the disease ceases to develop after October. From the grape growth period, the disease occurred in the flower buds.
3, control methods
(1) Seedling disinfection. Grape black pox disease spreads mainly through seedlings. Therefore, strict inspection of seedlings and seedlings must be carried out, and seedlings and seed strips suspected of being infected with bacteria must be disinfected.
(2) Do a good job in orchard sanitation, pruning, removing diseased leaves, diseased fruits, diseased vines, etc.
(3) spray protection. Spray 3~5 Baume degrees of lime sulfur before germination. During the grape growing period, from the start of the leaf to the 1/3 of the fruit, spraying once every 15 to 20 days, the medicament can be used 50% carbendazim wettability. Powder 1,000 times, 80% Zeoxin WP 600 times.
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