Migration Prediction and Monitoring of Rice Planthoppers in Japan

Migration of rice planthoppers and their vectored re-emerging and novel rice viruses in East Asia

This review examines recent studies of the migration of three rice planthoppers, Laodelphax striatellus, Sogatella furcifera, and Nilaparvata lugens, in East Asia. Laodelphax striatellus has recently broken out in Jiangsu province, eastern China. The population density in the province started to increase in the early 2000s and peaked in 2004. In 2005, Rice stripe virus (RSV) viruliferous rate o...

Isoiation of an entomogenous fungus , Entomophthoraceae ) , from migratory Ocean Ei : ynia deiphacis ( Entomophtherales : planthoppers collected over the Pacific

Four species of planthoppers were collected using net traps and an aspirator on a weather ship above the Pacific Ocean, An entornegenous fungus, thynia delphacis (Entomophthorales), was isolated from a specimen of the whitebacked rice planthoppeT, Sogatetla jurcijlera. The fungal isolate was infectious to 3 species of planthoppers, Sogatella.fttrcijbra, Nitaparvata lugens, Laocteiphax striatelt...

Passive Long-Distance Migration of Apterous Dryinid Wasps Parasitizing Rice Planthoppers

Current Status of Insecticide Resistance and Virulence to Resistant Rice Varieties in Asian Rice Planthoppers

Insecticide susceptibility and virulence to resistant rice varieties were determined and evaluated in the brown planthopper (BPH) and the whitebacked planthopper (WBPH), collected from Asian countries (Japan, China, Taiwan, northern Vietnam, southern Vietnam, and Philippines) in 2006. Insecticide susceptibility was determined by a topical application method using four insecticides. Virulence to...

Take-Off Time of the First Generation of the Overwintering Small Brown Planthopper, Laodelphax striatellus in the Temperate Zone in East Asia

Overseas migration of the small brown planthopper, Laodelphax striatellus (Fallén), occurs during the winter wheat harvest season in East Asia. Knowing the take-off time of emigrating L. striatellus is crucial for predicting such migrations with a simulation technique because winds, carriers of migratory insects, change continuously. Several methods were used in China and Japan from late May to...