Comprehensive Control of Main Diseases and Pests of Calla Lily
Today's sharing: Experience of the Calla Lily Clinic, comprehensive control of the main diseases and pests of Calla Lily, let's take a look together!
Calla Lily, also known as Water芋, Guanyin莲, belongs to the Araceae perennial herbaceous flowers. The leaves are green, the shape is unique, the peduncle is mostly as long as the leaves, the flower bracts are white and large, like horseshoes, and the flowering period lasts for more than 6 months.
I. Diseases
1. Calla Lily Soft Rot: Soft rot occurs near the ground, causing the leaves to wither upwards and the fleshy tubers to produce a spongy soft rot, the roots rot, and the whole plant suddenly wilts and dies. The leaf edges are affected, becoming soft and rotten. The peduncle is invaded, the flower turns brown, the peduncle softens and falls off, a bacterial disease.
Control methods:
(1) During harvest, remove diseased tubers and treat with a 40% formaldehyde 55-fold solution for 1 hour, then dry and store.
(2) When diseased plants are found, they should be pulled out and burned, and the soil around the diseased plants should be disinfected with a 40% formaldehyde 40-fold solution.
(3) The planting depth of tubers should not exceed 5 cm, and excessive watering should be avoided.
2. Calla Lily Leaf Spot Disease: There are 3 types of fungi that cause Calla Lily leaf spot disease, with Phyllosticta being the most common. Initially, the spots on the leaves are small, round, and gray-white, gradually expanding and merging into irregular large烂 spots, sometimes also infecting flowers and peduncles.
Control methods:
(1) Timely remove diseased leaves and avoid excessive watering. Do not water directly on the plants.
(2) Spray 25% Dalate emulsion 1000-1500 times or 80% Dazheng 500 times, every 7-15 days, for 2-3 times.
3. Calla Lily Virus Disease: Calla Lily virus symptoms show two types, mosaic symptoms are typical mosaic leaves, leaf shrinkage distortion, white spots or annular spots symptoms, are green ring spots or stripes near the veins, leaf distortion, small peduncles show white dots, flower buds have light-colored spots, flowers malformed, mosaic disease can be transmitted by sap and peach aphids.
Control methods:
(1) Select disease-free mother plants for propagation, and pull out and burn diseased plants in time during the growing period.
(2) During the whole growing period of Calla Lily, control aphids and thrips with 50%马拉硫磷 1000 times or 2.5% deltamethrin emulsion 3000 times.
II. Pests
Two-spotted Spider Mite: Also known as cotton red spider, hosts include sunflowers, Calla Lily, roses, peaches, asparagus, plum, chrysanthemums, hibiscus, roses, etc. The two-spotted spider mite absorbs leaf juice on the back of the leaves, causing the leaves to turn red as if burned, and severe cases lead to defoliation.
Control methods:
(1) Remove diseased leaves and集中处理 them.
(2) Spray 40% trichlorfon 1000 times, or 20% Haoniandong 2000 times, or 25% Aikasi 1500 times.
The above () introduces the comprehensive control of the main diseases and pests of Calla Lily, for everyone to learn and understand!