Technologies Developed by TNAU Sericulture Department
1. IPM for mulberry leaf webber
- Irrigation of the mulberry field immediately after pruning to expose the leaf webber pupae.
- Release of pupal parasitoid, Tetrastichus howardii @ 50,000 / ha one day after pruning followed by release of egg parasitoid, Trichogramma chilonis @ 5 cc/ha at 10 days after pruning.
- Spraying of dichlorvos 76 WSC @ 1 ml / litre (500 ml/ha) on 30 days after pruning.
- Clipping and burning of the affected shoots.
2. Food supplementation for higher yield of cocoons
Soya flour supplementation twice @ 5g per kg of shoot immediately after third and fourth moult increased the cocoon yield by 7 kgs per 100 dfls.
3. An eco friendly and broad spectrum, bed disinfectant TNAU Seri Dust for management of silkworm diseases
TNAU Seri Dust, a cost effective and ecologically safer bed disinfectant has to be applied over the silkworm body after first, second, third, fourth moult and on the fourth day of fifth instar larva to prevent secondary contamination in the rearing bed. It is found effective against viral, bacterial and fungal diseases of mulberry silkworm, Bombyx mori. Application of TNAU Seri Dust @ 4 kgs/100 dfls resulted in an additional yield of 9 kgs/100 dfls.
4. “Ilamathi”, a phytojuvenoid for increasing the silk yield
Treating this plant based product on mulberry leaves and feeding to larvae on second day of fifth instar prolonged the larval duration by 24 hours and increased the larval weight, cocoon weight, shell weight and shell ratio.
The cocoon yield increased by 9-12 kg / 100 dfls.
Good sized cocoons
5. Technology for root rot management in mulberry
- Severely infected plant should be removed and burnt immediately.
- Stopping the irrigation from infected plant to healthy plant.
- Drenching with carbendazim (0.2%) in and around the infected plants.
- By applying a mixture of Bio control agent’s viz., Trichoderma viride (1 kg) + Pseudomonas fluorescens (1 kg) along with 20 kg of farm yard manure @ 100 g / plant. This has to be applied thrice at 45 days intervals.
6. IPM package for uzifly management
- Fixing nylon net fixed on doors and windows
- Application of uzicide @ 5 litres / 100 dfls on third, fourth and fifth instars.
- Releasing of hyperparasitoid, Nesolynx thymus @ one lakh adults / 100 dfls during fourth, fifth instar stage and after cocoon harvest.
- Installation of uzitrap using azipore @ 25ml / litre and changed once in every three days from third instar stage onwards.
7. IDM package for grasserie disease of mulberry silkworm, Bombyx mori
Further detail contact to
- Application of TNAU Seri Dust, a broad spectrum bed disinfectant or any other bed disinfectant @4 kgs/100 dfls.
- Administration of 800 ppm hexane leaf extract of Plectranthus amboinicus immediately after second moult and third moult and gentamycin (50 ppm) after fourth moult through per os.
PROFESSOR AND HEAD
DEPARTMENT OF SERICULTURE
TAMIL NADU AGRICULTURAL UNIVERSITY
COIMBATORE – 641 003
TAMIL NADU, INDIA
Phone: Office: +91- 422 - 6611296