TUNGRO    

      It is the most damaging viral disease of rice and characterized by a yellow to orange mottled leaves. Disease plants are moderately to severely stunt and are irregularly distributed in the field.

How is this disease spread?

          Only the green leafhoppers (GLH), notably Nephotettix Vierscens, can spread the virus from the disease to the healthy plants. Nymph and adult leafhoppers (GLH) have the same transmission ability except that the nymph loses the tungro virus after molting. It will spread on those plants that at the tillering stages that are more preferred by the GLH and are also susceptible to infection. GLH tend to move from old to young and susceptible plants making them more prone to infection. Thus, tungro incidence mostly occurs in areas planted at different times (asynchronous). The Phil Rice builds a management practices to avoid the spread of the tungro through the following basis:

 

                      Before Planting              After Planting               After Harvest

 

       Integrated Pest Management is a practice that combines biological and cultural methods to control pest...