What should I do if the tips of spring orchids are dry?
Dry and charred tips on the leaves of spring orchid are a common problem during the maintenance process, which not only affects the ornamental value, but may also endanger the health of the plant. This article aims at the three core inducements, systematically analyzes pest control, temperature control and scientific watering skills to help you fully master the key points of spring orchid maintenance. Identification of key (T-J) disease and round spot disease prevention and control of spring orchid diseases. The typical symptoms of (T-J) disease are the appearance of yellow-brown depressed patches at the tip of the leaf and the appearance of dark brown halo on the edge. Round spot disease appears as a round brown spot with a black mold layer later. Two fungal diseases spread fastest when humidity>70%, and temperatures 25-28℃. The drug control plan starts prevention 15 days before the plum rainy season, alternating use of 50% carbendazim 1000 times solution and 25% azoxystrobin suspension 1500 times solution, focusing on spraying the back of leaves. Immediately cut off the infected area when the spot is found, and apply thiophanate-methyl ointment to the wound. Precise temperature control strategy Key points for cold prevention in autumn and winter When the night temperature falls below 12 ° C, spring orchids should be moved to the indoor southward sill to maintain a temperature difference between day and night of 5-8 ° C. Before the cold current strikes, wrap the basin body with non-woven fabrics to avoid "frostbite by sticking to the window" and ensure that the tip of the blade is more than 15cm away from the glass. Spring transition techniques Outdoor transplanting needs to meet the stable temperature of 18℃ during the day/10℃ at night for 7 consecutive days. Choose cloudy and windless weather for the first time out of the room, and cover 50% of the shade at noon, gradually extending the outdoor adaptation time. Scientific water management method Differences in seasonal watering In autumn, the principle of "moistening but not wetting" is adopted. The moisture content of the substrate is maintained at 40%-50%, and it is combined with leaf spray in the morning and evening. In winter, control the water to the substrate moisture content of 20%, and the water temperature needs to be consistent with room temperature to avoid cold water stimulating the root system. Specifications for cutting the burnt tip Use flame-disinfected scissors to cut the withered tip obliquely at 45° along the veins to retain 1cm of healthy tissue. Seal the incision with wax immediately after pruning, and spray 0.1% potassium dihydrogen phosphate to enhance resistance.
By establishing a disease prevention system, precise temperature control calendar and intelligent watering plan, the problem of dryness of spring orchid leaf tips can be systematically solved. It is recommended to conduct leaf microscopic examination every month, combined with environmental data records, to build a personalized maintenance model, so that spring orchid can maintain a perfect leaf state of straight and green.