The control action durations of DMI (demethylation inhibitor) fungicides (tebuconazole and fenbuconazole) against tea anthracnose (Discula theae-sinensis) were investigated by field tests with inoculation of the conidial suspension of pathogenic fungi. The curative effects of tebuconazole and fenbuconazole against tea anthracnose were similar and very high. The duration of the curative effect was 12 days after infection, and it decreased significantly 14 days or more after infection. Compared to the protective effects of TPN against tea anthracnose, which was observed for 7–8 days after application, the protective effects of tebuconazole and fenbuconazole were inferior and lasted for 6–7 days after application.

In October 2021, an individual of unidentified Miridae was captured at a yellow sticky trap set in the field in Tachikawa City, Tokyo, and identified as Nesidiocoris tenuis. In April 2015, the distribution of this species was also confirmed on Hahajima Island of the Ogasawara (Bonin) Islands. This is the first record of this species in the mainland field area of Tokyo, although it had been recorded from Chichijima Island of the Ogasawara (Bonin) Islands.

We investigated the seasonal prevalence of Orius spp. and its prey (thrips) on bitter gourd and cucumber cultivated in an open field in Kawasaki City, Japan. Adults of Orius spp. were observed on both crops soon after the occurrence of thrips. Since the thrips populations were suppressed after the settlement of Orius spp., it was indicated that Orius spp. is as a natural enemy of thrips on bitter gourd as well as cucumber plants. Adults and nymphs of Orius spp. were then maintained on both crops while suppressing the thrips populations. Recently, bitter gourd have become popular to be planted as a living wall, especially in urban sites. Therefore, it was suggested that such a living wall would provide some benefits to supply the indigenous natural enemy in conservation biological control (CBC) in urban agriculture.