As early as 1930s, Zhu devoted himself to collecting more than 3,000 plant specimens for taxonomic research after teaching. During my study in Japan, 24 1 plant diseases collected in China were compiled into a paper, Plant Parasites in China, which was presented at the Annual Meeting of Plant Pathology in Japan. During his work in Zhejiang Insect Bureau, he made a systematic investigation and study on Sclerotinia sclerotiorum. 1932 published Sclerotinia sclerotiorum in China and its comparison with arachidonic acid bacteria in English, which promoted the research and control of Sclerotinia sclerotiorum in China.
After the founding of the People's Republic of China, he still attached great importance to the collection and identification of plant disease specimens. Everywhere he went, he personally collected plant disease materials and made them into dry specimens or impregnated specimens. More than 3,000 specimens preserved in the Herbarium of Jiangsu Academy of Agricultural Sciences are full of his painstaking efforts. He also attached great importance to the identification of new plant quarantine diseases in China, such as the exotic fragrance of rice in Yunnan, ergot of wheat in Anhui, and sweet potato nematode disease in Shandong. He collected a large number of documents and compiled them into special teaching materials and taught them in the national plant quarantine training class. At the same time, according to my own experience in collecting and identifying fungal diseases for many years and referring to the literature on fungal classification at home and abroad, I compiled the Diagnosis of Plant Diseases, the Outline of Fungal Taxonomy and the Atlas of Fungal Taxonomy. Teaching in East China Agricultural Technology Cadre Training Course. These works reflect the research level and development trend of China in 1960s.