2007年７月，三重県伊勢市で栽培されていたセンダンキササゲ（別名：ステレオスペルマム）に本邦未確認の症状が確認され，病原菌としてFusarium solani，Phytophthora nicotianaeおよび２核のRhizoctonia sp.の３種が関与していることが明らかとなった。これら３菌によって引き起こされる本病をそれぞれ，センダンキササゲ立枯病（Fusarium rot of China doll），疫病（Phytophthora rot of China doll），根腐病（Rhizoctonia rot of China doll）と呼称することを提案する。
Imported carambolas in Shanghai market frequently suffer from brown rot disease, causing severe loss of commercial values. To clarify the causal pathogens, market disease surveys were conducted and the possible fungal pathogens were isolated from infected carambolas imported from Taiwan district, USA and Thailand. A new disease symptom has been found on USA carambolas, that is dark brown decay spot between peduncle and pedicel, with white molds attached and brown areas formed on the edge of the fruits. The isolated pathogen was named EXYL-1 and further identified via morphological and molecular characteristics. The aerial mycelium of EXYL-1 appeared white, produced some reddish to purple pigment and adhered to microconidium. Optimal temperature for the hyphal growth was 20-25°C. Together with the nucleotide sequences of ribosomal DNA internal transcribed spacer regions and specific gene sequences, this pathogen EXYL-1 has been identified as Fusarium proliferatum.
We evaluated the effects of pyriproxyfen application for mulberry scale, Pseudaulacaspis pentagona (Targioni), on the plucking yield of tea crop. Three treatments including pyriproxyfen applied in March 2010, DMTP applied in May 2010, and a control treatment were tested in a tea field. The densities of mulberry scale in every generation and the plucking yield of the first, second, and autumn tea crop from 2010 to 2011 were investigated. The pest densities in the field with pyriproxyfen application decreased after the first generation in 2010. The pest densities in the third and subsequent generation in the field with pyriproxyfen application were significantly lower than those with DMTP and control treatments. Although the yield of the first tea crop in 2010 in the field with pyriproxyfen application was similar to that with other treatments, the yield of first and second tea crop in 2011 was significantly higher than that with other treatments. These results suggest that sufficient suppression of the pest for some generations through pyriproxyfen application improves the vigor of tea trees and results in higher yield.