This paper made a study of the variety regulation of pathogens in the activated sludge through biological fermentation using Aspergillus niger as zymophyte.
By dissecting moribund fishes and isolationg the pathogens, we found that the “infection syndrome” was a complex polyinfection caused by Myxosporea and secondary bacterial infection.
Several non-infectious diseases including the leaf red spot, gummosis, herbicide in jury, typhoon damage and genetic albinism and an unidentified leaf crinkle disease are also described.
The feat silkworm room environment condition, can strengthen the silkworm son corporeity, repress the pathogeny breeding indoor,lower the outbreak rate, and raise the yield of the cocoon.
Under the selection pressure of crude toxin filtration, three kinds of treatment methods and four kinds of phytotoxin concentrations were used to screen the blast-resistant callus phenylalanine.