What is the symptoms any one of rice disease?
What is the symptoms any one of rice disease?
| Symptom | |
|---|---|
| Initially, small, dark-green, water-soaked translucent streaks on veins from tillering to booting stage Lesions turn brown and bacteria ooze out under humid weather. | Brown to Greyish Longitudinal Streaks on Leaves Lesions turn brown to greyish and drying of leaves |
In which insect A female lays about 2/3 egg masses in case of rice?
Brown planthopper
| Nilaparvata lugens | |
|---|---|
| Genus: | Nilaparvata |
| Species: | N. lugens |
| Binomial name | |
| Nilaparvata lugens (Stål, 1854) |
What is rice disease?
rice bacterial blight, also called bacterial blight of rice, deadly bacterial disease that is among the most destructive afflictions of cultivated rice (Oryza sativa and O. glaberrima). In severe epidemics, crop loss may be as high as 75 percent, and millions of hectares of rice are infected annually.
What is the damaging stage of jowar shoot fly?
Normally the damage occurs 1 to 4 weeks after seedling emergence. Seedlings of 5 to 30 days old are generally susceptible to shoot fly damage.
What are the symptoms of rice blast?
The symptoms of rice blast include lesions that can be found on all parts of the plant, including leaves, leaf collars, necks, panicles, pedicels, and seeds. A recent report shows that even roots can become infected.
Which of the following rice disease appears only after flowering?
Why and where it occurs False smut is visible only after panicle exsertion. It can infect the plant during flowering stage.
How do you stop rice weevils?
How can we reduce the occurrence of rice weevils?
- Store rice in a tightly sealed container and in a cool dry place.
- Buy rice in smaller quantities if your consumption rate is low (e.g. if a 2-person household seldom cooks rice, they can buy 1kg packs, rather than 5 or 10kg packs).
Which chemical is responsible for gall formation in rice?
cecidogen
The active substance, cecidogen secreted from the saliva of gall midge larva and the larval feeding on the meristematic tissue of terminal and auxiliary shoot apices in rice plant are responsible for gall formation (silver-shoot) in rice.
What are the common diseases of rice plant?
Diseases
- Bacterial blight.
- Bacterial leaf streak.
- Blast (leaf and collar)
- Brown spot.
- False smut.
- Rice grassy stunt.
- Rice ragged stunt.
- Sheath blight.
How do you control bacterial leaf streak of rice?
To prevent and effectively manage bacterial leaf streak:
- Plant resistant varieties.
- Treat seeds with hot water.
- Keep fields clean—remove weed hosts and plow under rice stubble, straw, rice ratoons, and volunteer seedlings, which may be infected by the bacteria.
Which is a serious pest of Jowar and Bajra?
Shoot fly, stem borers, shoot and ear head bug and aphids are serious pests that bring reduction in the yield.
Which fertilizer is best for jowar?
Manures and Fertilization in Sorghum or Jowar Farming:- The main field should be added with 10 to15 tone of Farm Yard Manure (F.Y.M) to make the soil rich in micro nutrients. At the time of sowing, basal application of 60:40:40kg N: P2O5-K2O should be applied. Should apply 35kg N/ha top dressing 1 month after sowing.
What are the symptoms of rice gall midge damage?
Symptoms of rice gall midge damage include: formation of a hollow cavity or tubular gall at the base of the infested tiller. affected tiller inhibits growth of leaves and fails to produce panicles deformed, wilted, and rolled leaf elongation of leaf sheaths, also called onion leaf or silvershoot plant stunting
How many eggs do rice gall midges lay?
Female rice gall midges lay eggs on the inner or outer surfaces of a leaf sheath, just below the ligules, or on the upper or undersides of leaf blades of young rice plants, either singly or in groups of 3-5 eggs. Each mated female lays up to 400 eggs during a 3-day life span.
What is the Asian rice gall midge (Wood-Mason)?
A taxonomic revision of the Asian rice gall midge, Orseolia oryzae (Wood-Mason), and its relatives (Diptera: Cecidomyiidae). Entomography, 3:127-162 Grist DH; Lever RJAW, 1969. Pests of Rice. London, UK: Longman. Grover P; Prasad SN, 1980. Bionomics of silver-shoot gall-fly Orseolia oryzae (Wood-Mason) a pest of rice in India.
How to get rid of gall midge in crops?
In the event of severe infestation of Gall midge, application of any of the plant based products like l0% Neem leaf extract, 5% NSKE, 1% Neem oil, 0.3 % Fish oil resin soap, 3 % Dasagavya and 3 % Herbal plant extraction can be sprayed to bring down the pest population. Collect and destroy infested crop debris.
