scholarly journals Damage to Ears of Rice Plants Caused by the White-Backed Planthopper, Sogatella furcifera(Homoptera : Delphacidae)

1986 ◽  
Vol 21 (3) ◽  
pp. 474-476 ◽  
Author(s):  
Hiroaki NODA
Keyword(s):  
Sogatella Furcifera ◽  
Rice Plants

scholarly journals Impact of Day Intervals on Sequential Infestations of the Rice Leaffolder Cnaphalocrocis medinalis (Guenée) (Lepidoptera: Pyralidae) and the White-Backed Rice Planthopper Sogatella furcifera (Horváth) on Rice Grain Damage

2014 ◽  
Vol 6 ◽  
pp. IJIS.S13536 ◽  
Author(s):  
Li-Ben Jiang ◽  
Jia Cheng ◽  
Zhan-Fei Zhu ◽  
Lin-Quan Ge ◽  
Guo-Qing Yang ◽  
...  
Keyword(s):  
Control Strategies ◽  
Cnaphalocrocis Medinalis ◽  
Rice Grain ◽  
Pest Species ◽  
Sogatella Furcifera ◽  
Biochemical Tests ◽  
Rice Plants ◽  
Grain Damage ◽  
Lepidoptera Pyralidae ◽  
Rice Leaffolder

The present study illustrates that different day intervals (DIs) between the sequential infestations of two pest species, the rice leaffolder (RLF) Cnaphalocrocis medinalis Guenée (Lepidoptera: Pyralidae) and the white-backed rice planthopper (WBPH) Sogatella furcifera Horváth (Hemiptera: Delphacidae), have a significant impact on the rice yield loss rate (YLR) and on the carbohydrate contents of rice plants. For WBPH release after RLF release (WRARR), the YLR decreased with the increasing DIs, and the YLR at the 24 DI was significantly lower compared to that at the 6 and 12 DIs and had a minimum value for a simultaneous infestation of the two pest species (SITS). In contrast, for RLF release after WBPH release (RRAWR), the YLR at the 24 DI had a maximum value and was significantly higher compared to that at the 6 and 12 DIs and the SITS. These findings indicate that damaged rice plants gradually recover, with an increase in the DI for WRARR. The above results were demonstrated by biochemical tests. Therefore, the sequential infestation of the two pest species and their DIs should be considered for integrated pest management (IPM) and control strategies for rice pests.

Ecological Fitness of Non-vector Planthopper Sogatella furcifera on Rice Plants Infected with Rice Black Streaked Dwarf Virus

Rice Science ◽  
2012 ◽  
Vol 19 (4) ◽  
pp. 335-338 ◽  
Author(s):  
Xiao-chan HE ◽  
Hong-xing XU ◽  
Xu-song ZHENG ◽  
Ya-jun YANG ◽  
Guang-chun GAO ◽  
...  
Keyword(s):  
Dwarf Virus ◽  
Sogatella Furcifera ◽  
Ecological Fitness ◽  
Rice Plants

scholarly journals Synergism Between Southern rice black-streaked dwarf virus and Rice ragged stunt virus Enhances Their Insect Vector Acquisition

2014 ◽  
Vol 104 (7) ◽  
pp. 794-799 ◽  
Author(s):  
Shu Li ◽  
Han Wang ◽  
Guohui Zhou
Keyword(s):  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Plant Viruses ◽  
Dwarf Virus ◽  
Insect Vector ◽  
Sogatella Furcifera ◽  
Rice Plants ◽  
The Family ◽  
Low Incidence ◽  
Rice Ragged Stunt Virus

Southern rice black-streaked dwarf virus (SRBSDV), a tentative species in the genus Fijivirus, family Reoviridae, is a novel rice virus transmitted by the white-backed planthopper (Sogatella furcifera). Since its discovery in 2001, SRBSDV has spread rapidly throughout eastern and southeastern Asia and caused large rice losses in China and Vietnam. Rice ragged stunt virus (RRSV) (genus Oryzavirus, family Reoviridae) is a common rice virus vectored by the brown planthopper (Nilaparvata lugens). RRSV is also widely distributed in eastern and southeastern Asia but has not previously caused serious problems in China owing to its low incidence. With SRBSDV's spread, however, RRSV has become increasingly common in China, and is frequently found in co-infection with SRBSDV. In this study, we show that SRBSDV and RRSV interact synergistically, the first example of synergism between plant viruses in the family Reoviridae. Rice plants co-infected with both viruses displayed enhanced stunting, earlier symptoms, and higher virus titers compared with singly infected plants. Furthermore, white-backed and brown planthoppers acquired SRBSDV and RRSV, respectively, from co-infected plants at higher rates. We propose that increased RRSV incidence in Chinese fields is partly due to synergism between SRBSDV and RRSV.

scholarly journals Fungicides Reduce the Abundance of Yeast-like Symbionts and Survival of White-Backed Planthopper Sogatella furcifera (Homoptera: Delphacidae)

Insects ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 209
Author(s):  
Kun Pang ◽  
Shengzhang Dong ◽  
Peiying Hao ◽  
Tongtong Chen ◽  
Xinlong Wang ◽  
...  
Keyword(s):  
Survival Rate ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Fat Body ◽  
Brown Planthopper ◽  
Sogatella Furcifera ◽  
Rice Plants ◽  
Water Dispersible ◽  
Gradient Gel Electrophoresis ◽  
Novel Strategy ◽  
And Function

The white-backed planthopper (WBPH) Sogatella furcifera is one of the most harmful pests of rice in Southeast Asia. The fat body of WBPH harbors intracellular yeast-like symbionts (YLS). YLS are vertically transmitted to WBPH offspring by transovarial infection. YLS play an important role in the WBPH life cycle. YLS diversity and function have been extensively studied in the brown planthopper (BPH) and small brown planthopper but not in WBPH, even though a novel strategy for controlling the BPH based on suppressing YLS has been proposed. Here, using denaturing gradient gel electrophoresis, we identified 12 unique fungal sequences among YLS of WBPH, and five of them represented uncultured fungi. We then fed WBPH with rice plants treated with different fungicides [70% propineb wettable powder (WP) (PR), 70% propamocarb hydrochloride aqueous solution (AS) (PH), 25% trifloxystrobin and 50% tebuconazole water-dispersible granules (WG) (TT), 40% pyrimethanil suspension concentrate (SC) (PY), and 50% iprodione SC (IP)] and evaluated their effects on YLS abundance and WBPH survival rate. Both YLS abundance and adult WBPH survival rate were significantly decreased upon feeding fungicide-treated rice plants, and exposure to 50% IP resulted in the strongest reduction. The abundance of two Sf-YLS species (Ascomycetes symbiotes and Cla-like symbiotes) was significantly reduced upon exposure to 50% IP. The counts of Ascomycetes symbiotes, the most abundant YLS species, were also suppressed by the other fungicides tested. In conclusion, 50% IP was the most effective fungicide, reducing YLS abundance and WBPH survival rate under controlled conditions, suggesting its potential use to control WBPH.

A Microinjection Method for Infecting the Planthopper Sogatella furcifera (Hemiptera: Delphacidae) with the Southern Rice Black-Streaked Dwarf Virus

2019 ◽  
Vol 112 (4) ◽  
pp. 1541-1545
Author(s):  
Kui Hu ◽  
Lin Qiu ◽  
Yurong Zhang ◽  
Yu Du ◽  
Hualiang He ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Reverse Transcription ◽  
Rice Plant ◽  
Dwarf Virus ◽  
Economic Damage ◽  
Sogatella Furcifera ◽  
Chain Reaction ◽  
Rice Plants ◽  
Polymerase Chain

Abstract The southern rice black-streaked dwarf virus (SRBSDV) causes significant economic damage to rice crops. This virus is transmitted to rice plants by the planthopper Sogatella furcifera (Horváth) in a persistent, circular, and propagative manner. Researchers currently lack suitable methods for assaying the activity of SRBSDV in vitro and preserving the virus all year. We used a microinjection method to directly inject SRBSDV extracts into the hemocoel of S. furcifera nymphs. SRBSDV was subsequently detected by Reverse Transcription-Polymerase Chain Reaction in more than 56.7% of the insects after 5 d and 60% of healthy rice plants fed by these insects also became SRBSDV infected. Moreover, injecting planthopper with an extract of SRBSDV-infected rice plant that had been frozen at −80°C for 220 d caused 63.3% to become viruliferous. These results indicate that SRBSDV can be successfully transmitted to S. furcifera by microinjection, and that extracts of SRBSDV-infected rice plants frozen at −80°C for 220 d still contain sufficient active SRBSDV to infect S. furcifera. We provide a novel way to preserve SRBSDV all year by injecting S. furcifera with the SRBSDV extract.

scholarly journals Southern rice black-streaked dwarf virus Alters Insect Vectors' Host Orientation Preferences to Enhance Spread and Increase Rice ragged stunt virus Co-Infection

2014 ◽  
Vol 104 (2) ◽  
pp. 196-201 ◽  
Author(s):  
Han Wang ◽  
Donglin Xu ◽  
Lingling Pu ◽  
Guohui Zhou
Keyword(s):  
Host Preference ◽  
Southern China ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Plant Viruses ◽  
Dwarf Virus ◽  
Virus Spread ◽  
Sogatella Furcifera ◽  
Rice Plants ◽  
Rice Ragged Stunt Virus

In recent years, Southern rice black-streaked dwarf virus (SRBSDV), a tentative species in the genus Fijivirus (family Reoviridae), has spread rapidly and caused serious rice losses in eastern and southeastern Asia. With this virus spread, Rice ragged stunt virus (RRSV, genus Oryzavirus, family Reoviridae) became more common in southern China, usually in co-infection with the former. SRBSDV and RRSV are transmitted by two different species of planthoppers, white-backed planthopper (WBPH, Sogatella furcifera) and brown planthopper (BPH, Nilaparvata lugens), respectively, in a persistent, circulative, propagative manner. In this study, using a Y-shape olfactometer-based device, we tested the host preference of three types of macropterous WBPH adults for healthy or SRBSDV-infected rice plants. The results showed that virus-free WBPHs significantly preferred infected rice plants to healthy plants, whereas both the viruliferous and nonviruliferous WBPHs preferred healthy plants to infected plants. In additional tests, we found that the BPHs significantly preferred healthy plants when they were virus free, whereas RRSV-carrying BPHs preferred SRBSDV-infected rice plants. From these findings, we propose that plant viruses may alter host selection preference of vectors to enhance their spread and that of insects vectoring another virus to result in co-infection with more than one virus.

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