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Production Know How
  • RKMP serves the generic information related to rice cultivation in more than 2500 Reusable Learning Objects (RLOs).In other words this information is not context specific and may be useful to extension workers cutting across the states (For example - principles of land levelling).
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Yellow stem borer

Yellow stem borer (YSB), Scirpophaga incertulas (Walker)
Distribution: This species is prevalent in many states across the country. It is a serious pest in all the rice ecosystems, particularly in deep water rices.
Description: <



Chemical control of Rice Tungro Virus vector

The spread of rice tungro disease can be checked indirectly by controlling the vector by suitable pesticide application. As the plants are more vulnerable to RTV infection during early stages of growth, chemical protection of the nursery effectively reduces green leafhopper population and thereby minimises the build up of virus inoculum as well as the pace of transmission.

Nursery Protection
Nursery protection is the key to successful managementof RTV. Incorporat

Use of resistant variety for RTV

Tungro virus can not be directly controlled by applying any chemical. The best method of preventing tungro is to grow resistant varieties. A variety may be resistant to virus or the insect vector or to both virus and insect vector.
VIKRAMARYA, developed at Directorate of Rice Research, Hyderabad is the resistant variety now available for general cultivation. Other promising resistant medium duration cultures include: IE

Mode of transmission of RTV

When young (nymphs) and adult green leafhoppers feed on diseased plants, virus particles get attached to mouth parts (stylets). As these insects fly and feed on other plants, the virus particles from the stylets get introduced into healthy plants. The insects pick up virus particles within 5 minutes of feeding and can transmit these particles to other healthy plants. The green leafhoppers can not retain virus for a long time. They acquire virus again through repeated feedings. Generally, 8 -10 d
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