The rice stem borer is a heart-boring insect that is one of the most serious recurrent pests on rice in recent years, posing a great threat to the safety of rice production, especially to hybrid rice. The damage caused by the borer is similar to that caused by Yellow Rice Borer: it not only affects rice at the tillering stage, causing dead sheaths and dead heart seedlings; but also it affects rice at the gestation and spike stages, causing dead gestation spikes and white spikes. What’s more it affects rice at the filling and milking stages, causing semi-withered spikes and insect-infested plants and white spikes.
Rice stem borer larvae infesting rice stems
Damage to conventional rice causing yield reduction Severe damage to hybrid rice causing crop failure
How to identify rice stem borer
Rice stem borer larvae are usually hidden in rice stalks. When you find a rice stem borer infestation in your field, try to peel back the affected rice stalks to see if there are any insects. The mature larvae are 20-30 mm long and are mainly characterised by five brown longitudinal lines on the back of their bodies.
larvae and pupae Rice stem borer larvae Rice stem borer adult
1. Treatment before planting
Rice is harvested in low stubble crushed and returned to the field Ploughing and filling water to kill
2. Seedling management
Spraying chlorantraniliprole at the seedling stage is effective in controlling the rice stem borer.
3. Sex pheromone control
Use the technology of sex pheromone monitoring and trapping for rice stem borer, which can reduce the difficulty of chemical control.
4. Chemical control
The application of pesticide should be rotated alternately to avoid resistance. Chemical insecticide,such as chlorantraniliprole, indoxacarb, lufenuron, emamectin benzoate etc.
One week after using KENVOS RADI PLUS (Emamectin benzoate 4% + Indoxacarb 12% SC) , the insects blackened and died
