Common Disease Prevention and Control Methods and Key Technical Points for Tiger Lilies
1. Penicillium rot
Symptoms: During storage, white spots grow on the spots of rotting scales, and fuzzy greenish-blue patches also appear. Eventually the pathogen invades the basal plate of the bulb, slowing the plant's growth rate.
Prevention and control method: Do not plant bulbs infected by the pathogen. Before planting, affected bulbs must be soaked for half an hour in a one-thousandth strength aqueous fungicide solution, then planted out.
2. Phytophthora
Symptoms: Soft rot occurs at the infected area at the base of the stem, appearing dark green, and gradually spreads upward; the leaves turn yellow, and the base of the stem also loses color. The above-ground stem is also often infected, causing the stem to bend.
Prevention and control method: First disinfect the soil; during cultivation use a fungicide that suppresses Pythium; the plants must not remain too wet for long periods, and in summer keep the soil temperature as low as possible.
That is all we have to share about how to grow tiger lilies. We hope it is helpful to you. Friends who like tiger lilies should hurry and try growing a few.
Diseases of Tiger Lilies and Their Prevention and Control
Tiger Lily Penicillium Rot
Symptoms
During storage, white spots grow on the spots of rotting scales, and afterward fuzzy greenish-blue patches also appear. In infected tiger lilies, rotting further increases at a low temperature of -2°C. Eventually the pathogen invades the basal plate of the bulb, and the pathogen also slows the plant's growth rate. Although the bulb may look unhealthy, as long as the basal plate is intact, the plant's growth will not be affected. After planting, the infection will neither transfer to the stem nor infect the plant from the soil.
Prevention and control method
Do not plant bulbs whose basal plate has been affected. Store the bulbs at the recommended minimum temperature. Before planting, affected bulbs must be soaked for 30 minutes in a one-thousandth strength aqueous fungicide solution, then planted out. After planting out, maintain a suitable soil temperature.
Tiger Lily Phytophthora
Symptoms
Foot rot of the plant hinders the growth of tiger lilies, and in severe cases causes them to wither. Soft rot occurs at the infected area at the base of the stem, turning dark green to dark brown, and spreads upward; the leaves turn yellow, and the base of the stem loses color. Similar soft rot infections also often occur on the above-ground stem, causing the stem to bend or damp off.
Prevention and control method
Disinfect the soil with a soil disinfectant; during cultivation, a fungicide that suppresses Pythium is also very effective; ensure good soil drainage; prevent the crop from remaining in a wet state after watering; in summer the soil temperature should be as low as possible.
Tiger Lily Bud Drop and Shriveling
Symptoms
Bud drop occurs when the flower buds grow to 1-2 cm. The color of the buds turns pale green, the pedicel connecting the bud to the stem also shortens, and afterward the buds fall off. In spring the lower buds are affected first, while in autumn the higher buds drop first.
Prevention and control method
Do not plant varieties prone to bud drop in places with insufficient light. During cultivation the bulbs must not dry out, to prevent the buds from shriveling. Ensure the bulbs have a good root system, and provide as suitable an environment as possible, paying particular attention to light and transpiration.
Disease Prevention and Control for Daylilies
Daylily (scientific name: Hemerocallis fulva) is a perennial herbaceous plant with fleshy roots. It has a short rhizome and thick, spindle-shaped fleshy roots. The daylily has many aliases, including "golden needle", "yellow flower vegetable", "forget-sorrow grass", "yi nan grass", "cure-sorrow", and "deer arrow", among others; in English the daylily is called "Tiger Lily" (which is also the English name of the tiger lily). When eaten, it is mostly called "golden needle". Its leaf shape is flat and long-linear, and the underground stem is slightly toxic and must not be eaten directly. As for the flowers, during the flowering period it grows slender green flowering stalks; the flowers are orange-yellow, with very long pedicels, and are tubular like lily flowers. The fruits it produces are winged. It is commonly cultivated throughout the country, and grows wild in the provinces and regions south of the Qinling Mountains. Disease Prevention and Control for DayliliesLeaf blight and rust are two diseases that very easily occur in large-flowered daylilies. Disease prevention and control should, on the basis of strengthening cultivation management, promptly remove weeds, old leaves and dried flower scapes and destroy them in a concentrated manner, to reduce sources of infection, and disease-resistant varieties should be selected for planting. In the early stage of the disease, a 500-800 times dilution of 50% mancozeb can effectively prevent and control the occurrence of leaf blight; for rust, in the early stage of the disease, spraying a 1000-1200 times dilution of 15% triadimefon wettable powder once every 10-15 d can effectively control the occurrence of the disease.