Control of Botrytis cinerea in cut Carnation
Symptoms: initially oval petals, brown, large and wet spots, followed by the growth of gray mold, petals and whole flowers decay, but also infected stems and buds. Cause: Long-term exposure to low temperature and humidity.
Control methods: keep the plants dry as much as possible, it is best to use drip irrigation for fertilizer and water control; keep good ventilation; spray 75% chlorothalonil 500 times solution, or carbendazim 500 times solution, alternately use, spray once every 7~10 days; in the evening, 10% Sukeling aerosol can be applied in the shed, and the shed is sealed overnight.
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Coring and pruning of carnation with cut flowers
1. The coring technology of cut carnation the purpose of coring treatment of cut carnation is to increase the number of branches, increase the number of flowers per plant and adjust the florescence, balance and timely supply of flowers. The main results are as follows: (1) during the coring period, the first coring of carnation is usually carried out about 30 days after planting, when there are 6-7 pairs of leaves in the main stem of the seedling. When there are 5 or 6 nodes on the main stem, the growing point of the stem tip can be removed, and more or less 1 or 2 nodes can be left according to the characteristics of the occurrence of lateral branches of different varieties.
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Insect pests of carnation with cut flowers
The main results are as follows: (1) Red spider: generally, the high temperature above 25 ℃ (from July to August) is serious, and a small amount has occurred around the middle of April. Control methods: remove litter and weeds, improve cultivation conditions, appropriately increase air humidity, initial stage: spray 40% dicofol EC 1000 times 1500 times, or 40% dimethoate EC 1500 times, or 25% imidophos EC 1000 times, or fenvalerate 800 times, or fenvalerate 800 times, or carbendazine, nisolan, pyridazinone, carbendazim, mifenac, etc.
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