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Frequently Asked Questions

Successful silkworm rearing of bivoltine silkworm rearing requires: [1] Good quality mulberry leaves, [2] Good hygienic conditions, [3] Optimum environmental conditions.

The advantages of shoot rearing are: [1] 50% labour saving, [2] 20% leaf saving, [3] Minimum handling of silkworm larvae, [4] Better keeping quality of leaf during storing and in the rearing bed, [5] More quality of organic manure, [6] Cost of production is reduced. Labour dependency is reduced.

IPM against uzi fly, Exorista bombycis: Different components of the IPM include: [a] Providing nylon net in the rearing house, [b] Use of uzitrap to attract and kill the adult uzi fly ( 10 tablet / 100 dfls), [c] Place the solution window (where sufficient light is available). Solution should be kept from 3rd age onwards up-to spinning, [d] Uzicide should be sprayed on alternative days from 2nd day of 3rd stage to 4/6th day of fifth instar except during moult. It should be sprayed after bed cleaning or 2-3 hrs after leaf feeding. 4-5 litre uzicde is sufficient for 100 dfls. Release of Nesolynx thymus (a parasitoid) to parasitise the uzi pupae.

In Sericulture, both silkworm rearing and synchronized spinning plays vital role in economics. Usually, the process of silkworm maturation lasts for 2-3 days. In winter season it may extend further. Because of this, farmers have to pick the ripe worms continuously thereby incurring extra expenditure. To over come this, the Scientists of CSR&TI, Mysore have invented a plant based spinning hormone called Sampoorna by using this, the maturation events will be hastened and can induce synchronized spinning.

Advantages:

Sampoorna is a plant-based steroid with moulting hormone activity.
Sampoorna can be used for early and uniform maturation.
Saves labour in picking the matured worms.
Reduces mounting period by 18 - 40 hours from the onset of spinning.
Early maturation can save the crop from out break of diseases in the fifth instar.
It can save the crop from unforeseen shortage of mulberry leaf in final instar.
The cocoon characters are not affected.
Dosage for 100 dfls: 4 liters of diluted hormone.

When to use: On the onset of spinning (when 3-5 % of matured worms are noticed in a batch).

How to use: The recommended quantity of Sampoorna is mixed with 4 liters of water. Give a thin feeding to silkworms and then spray the diluted solution over the feed using a hand sprayer. One more feeding (If necessary) can be given after complete consumption of treated leaf. All the worms will mature within 18-24 hours after spraying.

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