Working Mechanism and Technical Features
Solar light traps exploit the natural phototactic response of night-flying insect pests.
Core technical components:
- Targeted UV/LED wavelength: Emits light in specific ultraviolet and blue-green spectrums (typically 365 to 400 nm) highly attractive to nocturnal adult pests.
- Solar charging unit: Integrated solar photovoltaic panel charges internal lithium batteries during daytime for automatic night-time operation.
- Automated dusk-to-dawn sensors: Automatically switches on at dusk for 3 to 4 peak insect flight hours and powers off to conserve battery and spare beneficial fauna.
- Capture collection chamber: Funnel-shaped baffle traps insects into a collection bag, electrified grid, or soapy water tub to prevent escape.
Pests Controlled and Agronomic Utility
Light traps capture adult breeding moths before they deposit destructive eggs across crop canopies.
Primary pests managed:
- Paddy (Rice): Yellow stem borer adults (Scirpophaga incertulas), leaf folders, brown planthoppers (BPH), and green leafhoppers.
- Cotton and Pulses: Adult moths of American bollworm (Helicoverpa armigera), spotted bollworm, and tobacco caterpillar (Spodoptera litura).
- Sugarcane: Early shoot borer, top borer, and root borer adult moths.
- Vegetables and Maize: Fall armyworm (Spodoptera frugiperda), fruit borer adults, and cutworm moths.
Field Deployment and Government Support Schemes
Strategic field placement ensures wide pest attraction without interfering with field tillage.
Deployment and support guidelines:
- Installation density: Install 1 to 2 solar light traps per acre placed slightly above the standing crop canopy for maximum visual line-of-sight.
- Routine cleaning: Empty the insect collection tray every morning to monitor pest density and maintain clean capture funnels.
- Government subsidies: Subsidized under the National Mission on Natural Farming, Paramparagat Krishi Vikas Yojana (PKVY), and state IPM schemes.
Official source
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Department of Agriculture & Farmers Welfare ↗Related on KisanPe
Common questions
How does a solar light trap control crop pests without chemicals?
It emits specific light wavelengths that attract adult nocturnal moths into a collection chamber, stopping them from mating and laying eggs on crops.
How many hours per night should a light trap operate?
Operating for 3 to 4 hours starting immediately after dusk captures peak flight activity of major pests while minimizing catch of beneficial insects.
Which crops benefit most from solar insect light traps?
Paddy, cotton, sugarcane, maize, pulses, and vegetables facing severe borer and caterpillar moth pressures benefit significantly.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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