How to prevent and control pests and diseases of red spider lily? Latest technical methods tutorial
Red spider lily, also known as red-flowered lycoris, is a type of Lycoris. In winter its leaves are dark green, and in late summer and early autumn the leaves fall and the flowers bloom, bright and vivid, very beautiful, so many people want to grow a pot of red spider lily. Now let the editor talk to everyone about red spider lily pest and disease prevention and control techniques!
Bacterial soft rot
[Damage characteristics] Bacterial soft rot is a plant disease mainly caused by bacteria of the genus Erwinia. It can cause the tissues or organs of plants to rot. The pathogens are all weakly parasitic bacteria, mainly harming the succulent and thick organs of the red spider lily, such as tuberous roots, tubers, fruits, stem bases, etc.
[Prevention and control methods] Before planting the bulbs, soak them in 0.3% copper sulfate solution for 30 minutes, wash them with water, dry them, and then plant them. Spray 50% carbendazim wettable powder 500 times dilution every half month for prevention and control. In the early stage of the disease, spray with 50% benomyl 2500 times dilution.
Tobacco cutworm
[Damage characteristics] The tobacco cutworm mainly harms leaves, flower buds, and fruits with its larvae, gnawing on the leaf mesophyll and boring into flower scapes and seeds. It generally causes damage from late spring to November.
[Prevention and control methods] It can be controlled with 5% fipronil suspension concentrate 2500 times dilution, or Wanling 1000 times dilution.
Lycoris noctuid
[Damage characteristics] In plants invaded by Lycoris noctuid larvae, the leaves are usually hollowed out, and the larvae can directly bore into and feed on the inside of the bulb. The damaged areas usually leave a large number of green or brownish fecal pellets. Always pay attention to the underside of leaves to see whether there are neatly arranged eggs, and remove them immediately if found.
[Prevention and control methods] For prevention and control, winter or early spring plowing can be combined with digging out overwintering pupae to reduce the pest population base. When they occur, spray with chlorpyrifos 1500 times dilution or phoxim emulsifiable concentrate 800 times dilution, choosing to spray in the morning or evening when the larvae come out to move (feed). The control effect is relatively good.
Thrips
[Damage characteristics] Thrips are red all over and mainly occur where the bulb sprouts leaves, sucking nutrients and causing leaves to lose green. They are especially found in greater numbers after the fruits mature.
[Prevention and control methods] They can be controlled by rotating sprays of 25% imidacloprid 3000 times dilution and 70% Admire 6000-10000 times dilution.
White grubs
[Damage characteristics] White grubs are the general name for the larvae of the superfamily Scarabaeoidea in the order Coleoptera. The larvae live in the soil throughout their lives and like to eat newly sown seeds, roots, tuberous roots, tubers, and seedlings, etc., causing missing plants and broken rows. They are a type of pest with a wide distribution and severe damage.
[Prevention and control methods] After discovery, pesticides such as phoxim or trichlorfon should be used promptly for spray control.