Abstract: There is provided a process for producing a feed for elevating a rate of infection with a recombinant virus in a large number of silkworms, and a method of simultaneously inoculating orally a recombinant virus into a large number of silkworms. A process for producing a feed for elevating a rate of infection with a recombinant virus in a large number of silkworms includes mixing a powdery synthetic feed with a distilled water in which Tinopal UNPA-GX is dissolved at a final concentration of 0.2 to 0.

Abstract: The present invention herein provides a method for collecting insect hemolymph which permits the collection of hemolymph, at a time, from a vast number of insect bodies, which does not cause any scattering of the hemolymph during collection thereof, which may widely be used, which permits the collection of the hemolymph free of unnecessary tissues or the like and which can inhibit the melanization of the collected hemolymph. The insect hemolymph can be collected by freezing anesthetized lepidopterous insects, piercing the epidermis of the frozen insects without damaging the alimentary canals thereof and then thawing them in a buffer solution containing a melanization-inhibitory agent to thus discharge the hemolymph of the insects into the buffer solution through the holes while making use of the self-contraction phenomenon caused during the thawing process.