Occurrence and Control of Maize Dwarf Mosaic Disease
Dehydrated Tomato Flakes,Dehydrated Tomato Powder,Dehydrated Dried Vegetables Tomato,Healthy Pure Dehydrated Tomato Laiwu Manhing Vegetables Fruits Corporation , https://www.manhingfood.com
Corn can be infected by the whole growth period, and plants infected with seedling stage have obvious symptoms and serious losses. The diseased plants are weak, thin, and grow slowly. Plant height is often less than half of the height of healthy plants. The diseased seedlings initially had many small spots or mottles between the veins at the base of the heart, and arranged along the veins as intermittent points of varying lengths. Symptoms gradually spread to the entire leaf, forming several backstrips with different lengths and different shades of color in the rough veins. The leaf loses green and yellow, and the veins remain green. It is also called mosaic stripe disease, and the condition further develops. The leaf color turns yellow and the tissue becomes hard, brittle and even dry. Most of the diseased plants withered prematurely and could not head.
Maize dwarf mosaic virus has become an important primary infestation source on host plants such as Bromegrass, Hemperia, or in some varieties of seeds. It has been transmitted by more than 20 species of aphids, such as corn borer, peach aphid, and bifurcation. Non-persistent mode spreads and juice friction spreads. The incubation period for onset is about 7 days at 20-32°C, and about 4-5 days for those above 35°C. Possessing large numbers of poisonous locusts, dry weather, and extensively managed land masses. The incidence of spring corn is generally lighter than that of summer corn. Early summer sowing of corn is lighter than that of late summer corn. The years of rainfall and abundant rainfall are not conducive to the migration and spread of locusts, and the occurrence of disease is light. Maize hybrids are more resistant than parental inbred lines.
Prevention:
1. Cultivation and management measures (1) Planting disease-resistant hybrids such as Luyu 11, Ludan 46, Ludan 053, Jidan 321, and Plant 941.
(2) Adjust the sowing date so that the seedling stage of corn avoids the peak of aphids moving from a wheat field to a corn field.
(3) Strengthen field management, timely cultivating and weeding, and removing diseased plants for destruction.
(4) Transplanting seedlings can reduce the occurrence of diseases.
2. Chemical control Seed dressing with 10% imidacloprid wettable powder with 0.1% corn seed weight has obvious effects on the control of seedling aphids, thrips and migratory locusts. When it was found that the central loquat can be sprayed with 50% anti-inferiority WP 1500 times. When there is a pod strain rate of 30% to 40%, when honeydew emerges, it should be applied to the whole field. You can also use poison sand control. For every 667 tons, use 40% Dimethoate 50L. After diluting 500L of water, mix 15kg of fine sand, and then spread evenly the poisonous sand evenly on the heart of the plant. 1 gram per plant. It can be used for both thrips, corn borers and armyworms.