Symptoms
In the vegetative phase, the central shoot dies off turning yellow in colour (dead heart). In the ear bearing stage, the ear head appears completely chaffy and white in colour (white ear head). Both come out easily when pulled up and show indication of feeding injuries at the base.
Management
-
Collect egg masses from the nursery plants and observe for parasitisation.
-
Cultivate tolerant varieties like IR-20 in endemic areas.
-
In areas where stem borer occurs as a serious pest in all seasons, apply any one of the following insecticides first 15-20 days after transplantation and then at the boot leaf stage keeping minimum water level: quinalphos (spray or granules), carbosulfan, cartap hydrochloride (spray or granules), Flubendiamide, indoxacarb, malathion or spinosad , Fipronil, Chlorantraniliprole.
-
Use sex pheromone for the control of rice stem borer as given in the table below:
Sex pheromone used for the control of rice yellow stem borer (ad hoc recommendation)
|
Chemical name of the pheromone |
2-(z)-9-heaxadecanol 2-(z)-11-hexadecemol in 1:3 identified from female moths |
|
Sex attracted |
Male moths |
|
Description of the trap |
Sleeve trap with pheromone loaded rubber septa |
|
Uses |
Pest monitoring: 3 traps can be fixed in a triangular fashion at about 80 m apart |
|
Mating confusion |
|
|
Number of traps required/ha |
Twenty |
|
Sources of availability |
Entomology Department, Directorate of Rice Research, Rajendra Nagar, Hyderabad. |
|
Pest Control India limited, Bio-control Research Laboratories P.O. Box. 6426, Yelahanka P.O., Bengaluru-560 064 Karnataka |
|
|
Ecomax Agrosystems 302, Faigha Plaza Basher Bagh, Hyderabad. |
|
|
Dr. David Hall and Dr. Allen Cork, Natural Resources Institute, Kent ME4, 4TB, United Kingdom. |
|
|
The Managing Director, Som IPM System (India) Ltd., Plot No.101 1 Floor, Srinagar Colony, Hyderabad. |