Detailed Methods and Techniques for Preventing and Controlling Pests and Diseases of Mountain Lilies

Lily gray mold, anthracnose, and late blight are common diseases of plants in the Liliaceae family. If not controlled in time, they will cause reduced yields.

(1) Lily gray mold, also known as leaf blight, belongs to the Deuteromycetes. It mainly occurs on stems, leaves, and flowers, and mostly damages the tips of young leaves, causing the stem growing points to soften and rot. When it occurs on leaves, it forms yellow or reddish-brown spots with water-soaked margins. In humid weather, gray mold-like substances are produced on the diseased parts. Control: In the early stage of disease, spray 1:1:150 Bordeaux mixture or mancozeb 600-800 times dilution, spraying 2-3 times consecutively.

(2) Anthracnose belongs to the Deuteromycete fungi and mainly infects leaves, flowers, and bulbs. When leaves are affected, oval, light green spots with yellow-brown surroundings appear, with sunken centers. When bulbs are affected, light red irregular spots appear on the outer scales, with a clear boundary between diseased and healthy tissue, and the spots later turn dark brown and harden. Control: Select disease-free bulbs for planting, and the bulbs to be planted must be disinfected. For field outbreaks, irrigate the roots with 50% carbendazim 1000 times dilution.

(3) Late blight is also a fungal disease. It can infect leaves, stems, flowers, and bulbs. When stems are affected, water-soaked light brown spots appear and gradually spread upward and downward, causing stem rot and leaf withering and death. In severe outbreaks, flowers, stem bases, and scales can all be damaged, leading to the destruction of the entire field, with severe outbreaks in hot and humid seasons. Control: In the early stage of disease, spray 25% metalaxyl 800 times dilution, then spray metalaxyl-mancozeb, dimethomorph, and other agents, with alternating use giving better results.

(4) Pests: The main pest of mountain lilies is aphids. Aphids often gather in groups on young leaves and flower buds to suck sap, causing stems to shrivel, poor growth, and affected flowering and fruiting. Spraying 40% dimethoate emulsion 800-1000 times dilution during the occurrence period has an excellent control effect.