How to prevent and control viral diseases in lily cultivation?
How to prevent and control lily viral diseases? What harm do lily viral diseases cause? Can any netizen help explain? The harm of lily viral diseases: Lily viral diseases mainly include lily mosaic disease, necrotic spot disease, ringspot disease and rosette disease, 4 types. In lily mosaic disease, the leaf surface shows light green and dark green mottled patches, and in severe cases the leaves...
How to prevent and control lily viral diseases? What harm do lily viral diseases cause? Can any netizen help explain?The harm of lily viral diseases:
Lily viral diseases mainly include lily mosaic disease, necrotic spot disease, ringspot disease and rosette disease, 4 types. In lily mosaic disease, the leaf surface shows light green and dark green mottled patches, and in severe cases the leaves fork and twist, and the flowers become deformed or the buds do not open.
Some varieties' seedling plants can produce mosaic symptoms; lily necrotic spot disease sometimes occurs as latent infection, and sometimes necrotic spots appear, and in some varieties the flowers twist and become deformed into a tongue shape; lily ringspot disease produces necrotic spots on the leaves, the plant has no main stem, and has no flowers or develops poorly; plants infected with lily rosette disease appear rosette-shaped, the leaves are light green or light yellow, and streaks or mottling appear. Infected young leaves curl downward and twist, and the whole plant is dwarfed.
Causes of lily viral diseases:
The viruses of lily mosaic disease and lily ringspot disease both overwinter in the bulbs and are spread through sap inoculation, and aphids can also transmit the virus. Lily necrotic spot disease is passed on to the following year through the bulbs. In addition, sap rubbing can also transmit the virus, and melon aphids, green peach aphids and other insects are virus-transmitting vector insects. Lily rosette disease is transmitted by aphids, and when the aphid population is large, this disease occurs severely.
Prevention and control methods for lily viral diseases:
(1) Select bulbs from healthy plants for propagation; where conditions permit, set up disease-free seed production plots; promptly remove diseased plants when found, and bulbs from diseased plants must not be used for propagation;
(2) During the lily growing period, promptly spray 10% imidacloprid wettable powder at 1500 times dilution or 50% pirimicarb ultra-micro wettable powder at 2000 times dilution to control virus-transmitting aphids and reduce the spread of this disease.
(3) In the early stage of the disease, spray 3.85% Bingdubike wettable powder at 700 times dilution or 7.5% Keduling aqueous solution at 800 times dilution, 0.5% Kangduji No. 1 aqueous solution at 300-350 times dilution, 5% Junduqing aqueous solution at 300 times dilution, 20% Bingduning water-soluble powder at 500 times dilution, once every 7-10 days.
Click to get more lily cultivation techniques
Click to get more flower cultivation techniques