CropPest DSS
Rice leaf folder, Cnaphalocrocis medinalis Guenee

The rice leaf folder, Cnaphalocrocis medinalis (Guenee) (Lepidoptera: Pyralidae) was earlier considered a minor pest in many Asian countries. However, it assumed major pest status since the 1980s causing serious economic loss in case of severe infestation coinciding with susceptible crop growth stages (maximum tillering to booting). The shift in pest status is mainly attributed to changes in crop management practices such as cultivation of high yielding varieties, adoption of higher plant density, planting either too early or too late, higher N fertilizer use and increased insecticide applications for pest control adversely affecting natural enemies of leaf folder. The pest undergoes two to three generations on rice crop. The first brood on rice is initiated mainly through immigrating adults while the second and third broods develop within the crop and are the most damaging . It is possible to forecast the timing of leaf folder activity in the field based on the concept of thermal time for completion of insect life cycle. To predict the timing of pest stages, user is required to provide inputs such as date of transplanting, current season weather data for the location, date of first observation of pest (BioFix Date) and pest stage observed on that date. Further user can select the applicable state/district.

Date of Transplanting / Direct Sowing (dd/mm/yyyy)
Upload Weather Data File
 Sample Data file in csv format
BioFix Date (dd/mm/yyyy)
Observed Life Stage in field as on BioFix Date
Accumulated Degreeday Forecast
Select State
Select District

Read more on Leaf folder

Leaf folder Egg
Leaf folder Larval
Leaf folder Pupa
Leaf folder Adult Female