The Yellow Stem Borer (YSB), scientifically known as Scirpophaga incertulas, is a major pest of paddy crops worldwide, causing significant yield losses. This moth's larvae are the culprits, targeting various parts of the paddy plant throughout its growth stages. rice yellow stem borer damage during the tillering stage can be compensated for by the plant producing new tillers. However, damage during the panicle development stage, especially just before or after booting, can be catastrophic, leading to significant yield losses.
- Type of Infestation: Pest
- Common Name: Yellow Stem Borer stemborer
- Causal Organism: Scirpophaga incertulas
- Affected Parts Of the plant: Central Shoot, Leaf sheet and stem
Identification Of Yellow Stem Borer:
- Eggs: Creamy white, flattened, oval, found in masses covered with buff-colored hairs, usually near leaf tips.
- Larvae: Pale yellow to yellowish-green, up to 20 mm long, with a brown head.
- Pupae: White, silken cocoons found inside stems or stubble.
- Adults: Moths with yellowish-brown wings and a single black spot on each forewing. Females are larger than males.
Environmental favorable factors for Yellow Stem Borer in Paddy:
- Temperature: warm temperatures, with optimal development occurring between 25-30°C (77-86°F). Warmer temperatures accelerate their life cycle, leading to more generations per season and increased damage potential.
- Humidity: Humid environments (70-80% relative humidity) provide favorable conditions for egg laying, larval survival, and pupation.
Paddy stem borer Symptoms of Pest/Disease:
- Central shoot withers and dies, easily pulled out, leaving a dead central cavity.
- Yellowish-white patches on leaf sheaths due to larval tunneling.
- Panicle remains unfilled and turns white due to nutrient deprivation caused by stem damage.
- Tiny holes on the stem, especially near nodes, where larvae enter.
- Sawdust-like excrement near stem holes and around the base of the plant.
- Weakened stems break, causing tillers to die.
Measures to control Yellow Stem Borer in Paddy:
To control Yellow Stem Borer in paddy, using the best insecticide for stem borer is essential.
| Products | Technical Names | Dosages |
| EMA 5 | Emamectin benzoate 5 % SG | 100ml/acre |
| Doctor 505 | Chloropyriphos 50 % + cypermethrin 5 % EC | 300ml/acre |
| Finish It | All in one Larvicide | 100ml/acre |
| Fantasy | Fipronil 5 % SC | 400ml/acre |
Frequently Asked Questions
Q. What is the scientific name of the yellow stem borer?
A. The scientific name of the yellow stem borer is Scirpophaga incertulas.
Q. What are the symptoms of paddy stem borer infestation?
A. Symptoms of paddy stem borer include yellowish patches on leaf sheaths, dead central shoots, and tiny holes on stems.
Q. What is the life cycle of the rice yellow stem borer?
A. The rice yellow stem borer life cycle includes stages from egg to larvae, pupae, and adult moth, thriving in warm, humid conditions.
Q. How can I control paddy stem borer?
A. To control paddy stem borer, use chemical treatments and implement proper field management practices.
For additional information on pest and disease management, check out our other blogs
