Aromatic rice as a trap crop for stem borer management in rice

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Aromatic  rice as a trap crop for stem borer management in rice

Technology Profile 

The use of aromatic rice variety (Pusa Basmati1) variety as ‘Trap crop’ for the management of yellow stem borer has been successful. Studies were carried out to explore the possibility of using a susceptible variety as a trap crop to wean way the pest from damaging the main crop. Initial efforts made at ICAR- IIRR revealed the utility of aromatic varieties of rice in trapping the larvae of yellow stem borer which were attracted to these varieties more than the non aromatic lines. Of the many varieties tested, Pusa Basmati-1 was found to be the most susceptible aromatic variety which when planted in the main field can help in minimizing the damage to the main crop. The duration of the main crop and the trap crop were considered based on which the date of sowing was adjusted so that the trap crop would come to booting a week earlier than the main crop. However, planting of main crop and trap crop was done at the same time. Planting of one row of Pusa Basmati-1 as trap crop, preferably in east– west direction, for every 2.5-3m of main crop, resulted in effectively managing the pest in the main field planted with popular variety. The stem borer damage observed in the main crop was half of the damage that was recorded in the trap crop. By adopting this practice in a stem borer endemic area, impulsive spraying of chemical pesticides against yellow stem borer could be avoided at the vegetative stage. The yield was higher in the main crop where trap crop was grown compared to the fields without the trap crop. Also, though the yield in trap crop was affected due to higher pest damage the resulting yield from the trap crop would still be of added advantage as aromatic rice fetches premium price. 


Empirical Evidences 

Demonstration yields and incomes 

Practical Utility/ Scalability