Control of Sclerotinia sclerotiorum stem blight of carnation
It mainly affected the root and neck of the plant and dried up and died quickly after infection.
The pathogen infected the root neck of the seedlings near the soil surface, and brown or dark brown spots appeared at the initial stage, and gradually spread to the periphery. The base of the seedlings rotted and constricted, resulting in lodging. The seedlings with more aging stem base were damaged, and the cortex of the near soil surface was rotten and sticky. The leaves of the diseased plant were pale and drooping, and finally the whole plant withered and died.
Prevention and control methods:
The main results are as follows: (1) flowerpots and soil should be disinfected before cutting.
(2) the plant should be planted in the high seedling bed, and the watering should be controlled so as not to make the basin soil too wet.
(3) when the sterilized soil is again infected by Rhizoctonia solani, 75% pentachloronitrobenzene can be used to sprinkle the soil, the dosage is 0.1% of the weight of the basin soil, or 3-5 grams per square meter. At the same time, spray 1% Bordeaux solution every 10-15 days to protect.
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A New Disease-resistant and High-quality Carnation Variety "Yunzhi Butterfly"
"Yunzhi Butterfly" is a new variety of carnation bred by Flower Research Institute of Yunnan Academy of Agricultural Sciences. The trial planting of carnation in the main producing areas of Yunnan in 2005 showed the characteristics of wide adaptability, high yield, strong disease resistance, pure flower color, resistance to transportation, long vase life, easy cultivation and so on. In 2005, it won the registration and protection of new plant varieties of the Ministry of Agriculture. First, botanical characteristics. Single flower type. The cross section of the stem is prismatic and has no cavity. Leaves blue-green, sword-shaped, 15.99 cm long, 0.92 cm wide, surface wax
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Prevent the calyx of carnation from breaking
In the cut flower cultivation of carnation (also known as carnation and carnation), a physiological disease-calyx rupture often occurs. The physiological cause of calyx rupture is the growth of petals, which quickly exceeds that of sweet potatoes and breaks the calyx, especially in large rotation with more than 60 petals. In addition, in the flowering stage, calyx cracks often occur due to the increase in the number of petals or flowers and the large temperature difference between day and night. Therefore, low temperature, too much watering or too much fertilizer, especially too much phosphorus, can easily cause calyx rupture. Ways to prevent calyx cleft:
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