What are the control methods for parasitic diseases of silkworms?

I. Polyvoltine flesh fly maggot disease 1 Symptoms: A black triangular diseased spot appears at the parasitic site on the silkworm, with a pale yellow fly eggshell adhering to it. 2 Control: ① Capture and kill fly pupae. ② Use "Miecanying" (silkworm fly killer) to kill maggots. For body spraying use a 300-fold dilution; for spraying on mulberry leaves to feed silkworms use a 500-fold solution. For 5th instar silkworms, apply once every other day; for the 4th instar, use 1 to 2 times; do not use before the 3rd instar. II. Acariasis (mite disease) 1 Symptoms: Young silkworms die quickly after being affected, most with head and thorax protruding, body color dull and dark; those affected during molting cannot shed their skin and die; affected large silkworms pass string-of-bead feces or irregular feces, with prolapsed anus, small hairy-legged silkworms, and various symptoms such as protruding head and thorax, curved body, and water vomiting appearing simultaneously. 2 Control: Use sulfur fumigation or spray with 300-fold "Miecanying". When disease occurs during the silkworm rearing period, find the source of mites and cut it off. Quickly change the trays, spray the silkworm bodies with "Miecanying" to repel mites. The concentration of "Miecanying" is: 1000-fold for the 1st instar, 500-fold for the 2nd instar, 300-fold for the 3rd to 5th instars, and do not pile up cotton, wheat straw, rice straw, rice grain, etc. in the silkworm rearing room.