SPODOPTERA REARING CAGE
SPODOPTERA REARING CAGE can be group reared unlike Helicoverpa as there is no cannibalism. For the first 4-5 days, the larvae are reared under the inverted Petri-dish having diet. Later, about fifty larvae are transferred to Spodoptera rearing cage:
1. Put the sterilizered sand in the cage so as to have about 20 mm thick sand layer.
2. Set the plastic mesh in the cage so as to make upward curve.
3. Put about 50 larvae on the sand layer. Keep the diet cake on this curve and press the lid so that the diet gets sandwiched between the lid and the mesh.
4. The larvae will climb and feed on the diet.
5. The excreta fall on the sand and it is by no mean get mixed up with the diet.
6. The moisture of the excreta is absorbed by the sand thus chances of mould development on excreta are reduced.
7. The diet quantity can be observed through the windows provided in the sides of the cage. The diet can be replenished if it is used up.
8. Window provided on all the four sides of the cage maintains the requisite ventilation.
9. After larvae development is complete they fall on the sand and pupate inside the soil.
10. The pupae are collected, washed and sterilized in 0.05 percent sodium hypochlorite solution.