Ball Iris Pest Management
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The bulbous iris is also known as Alice, Basket Butterfly, which is the iris family and Iris flower. The flowers are large and beautiful. The flowers are unique in color. They are green and green, like swords. If they are known as the goddess of rainbow Alice, they are the world-famous garden flowers and excellent cut-flower varieties. The bulbous appendix has strong cold resistance, and it is well-absorbed in well-drained, moderately moist, slightly acidic loam soil. It can also grow on sandy soil and clay and is resistant to drying. Based on the production practices of the past few years, the pest control methods for bulbous appendix were studied and are presented below. - Diseases caused by fungi In plants with blight disease, the bulbous scales became soft and then gray-brown, covered with white mold, and eventually rotted completely. The etiology is mainly caused by spores. The higher the temperature, the faster the disease spreads. Control methods: 1 use tetrachlordane and Lei Lai to sterilize bulbs. 2 Disinfect the soil with steam sterilization or with potassium bromide. 3 Rotations with gladiolus and freesia. 2. Root rot mainly manifested in the local growth of plants, withered flowers and with water-stained roots. The etiology is that the nematodes are difficult to control because they are rooted in the soil. Control methods: 1 Disinfect the bulbs with tetrachlordane + lecithin. 2 soil disinfection, or after the onset of disease in the early stage of the disease, 5 to 8 g of siridex or 7 to 14 ml of pulp is used for disinfection. 3 sterilize with methyl bromide. 3. The mandible rot of the rot rot disease showed poor fertility, the leaves turned yellow and soon withered; the base of the bulb was corrupted, and white mould was later produced. Prevention and control methods: 1 Oxidized bitter soil disinfection. 2 Lobiron impregnated bulbs for disinfection. Second, the virus caused by the disease Viral disease, also known as mosaic disease, mainly as the leaves have gray round spots or yellow, white stripe, the plant leaves see through the light, there are many small transparent spots, purple spots soon changed by The lower leaves withered. The main cause is the infection of the virus by aphid vectors or hands and appliances. Control methods: 1 Select disease-free plants or bulbs when breeding. 2 hands, tools and other tools disinfection. 3 Use marathon, omethoate, annihilation and other pesticides to control aphids. Third, other pests and diseases 1. The root rot of the nematode plant has local growth retardation after the victim suffers, the calyx withered, and the roots show many short and narrow black roots. In severe cases, the bulb will rot. Control methods Steam sterilize or sterilize the soil with methyl bromide. 2. The quail mainly reproduces in the weeds. The early crop damages the tip of the bud, and soon the leaves of the plant are ready to eat. Control methods: 1 spraying heptachlor disinfestation. 3 Remove weeds early. In addition, the appendix is ​​also prone to insect pests such as aphids and red-walled mites during the growth process, mainly occurring during high-temperature drying, and is not easily extinguished during large-scale occurrence. Therefore, organic sulfur compounds should be sprayed at an early stage (killing, killing, etc.) And other antibacterial agents that can kill insecticides, such as dichlorvos, can also receive good control effects. However, it is easy to produce phytotoxicity at high temperature and humidity and throughout the flowering period, so it should be avoided or sprayed with clean water after spraying. The conditional use of the injection pipe for pressurized water spraying is also effective for removing insects.