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We evaluated the effectiveness of vapor heat treatment on Thrips palmi Karny, Bemisia tabaci(Gennadius), and colonies of powdery mildew, Sphaerotheca fuliginea(Schlechtendal)Pollacci, on greenhouse melon seedlings. Air was gradually heated to a set temperature(48°C)over 45 min while the relative humidity was maintained at 95%. The set temperature was then held for 8 min. The numbers of T. palmi adults and larvae, B. tabaci adults, and colonies of powdery mildew were lower on seedlings held at 48°C for 8 min than on untreated seedlings. The hatchability of T. palmi and the ratio of emerged adults were lower on treated than on untreated seedlings. Treatment at 48°C for 8 min did not visibly damage the seedlings. These results suggest that vapor heat treatment at 48°C for 8 min can effectively reduce the population densities of T. palmi eggs, larvae, pupae, and adults, B. tabaci adults, and powdery mildew on greenhouse melon seedlings. [ABSTRACT FROM AUTHOR]

We evaluated the effectiveness of using an indigenous generalist predatory mite, Neoseiulus barkeri (Hughes) (Acari: Phytoseiidae), to control Thrips palmi Karny (Thysanoptera: Thripidae) in greenhouse melons. In a growth chamber experiment, the density of T. palmi was lower on plants exposed to 20 N. barkeri per plant than on plants grown without a biological control. In a greenhouse experiment, the density of T. palmi was lower in the N. barkeri release plots than in the no-release plots. These results suggest that N. barkeri is an effective biological control agent against T. palmi. [ABSTRACT FROM AUTHOR]

The effects of red-light irradiation and a reflective sheet cover on the population density of two thrips species（Thysanoptera: Thripidae）, the melon thrips（Thrips palmi Karny）and the onion thrips （Thrips tabaci Lindeman）, were investigated on eggplant and cucumber in a greenhouse in 2014 and 2015. Red fluorescent lamps were illuminated from above the plants and a light reflecting sheet was placed on the ridges of the treated plots. A greenhouse without either material was set up as a control plot. The population densities of the two thrips species on eggplant and T. palmi on cucumber were significantly lower in the treated plots than in the control plot. [ABSTRACT FROM AUTHOR]

The attraction of melon thrips, Thrips palmi Karny (Thysanoptera: Thripidae), to reflective-type traps combined with blue sticky board and a blue light emitting diode (LED) array was investigated in July 2011 in an eggplant greenhouse. The peak wavelength of the blue LED array was 470 nm. The LED array was placed close to the plants and directed toward the sticky board. The number of adult thrips caught by the reflective-type trap at a light intensity of 3×1017 photons (/ m²·s)was significantly greater than the number caught by the control, a non-illuminated trap. Furthermore, the number of adult thrips caught by the reflective-type trap was significantly greater than that for the control during 18:00-21:00 and 21:00-0:00. Additionally, significantly more female adult thrips were caught by the reflective-type trap than by the non-illuminated trap, especially during the 18:00-21:00 time period. [ABSTRACT FROM AUTHOR]