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Introduction
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July 2010 - present
August 2004 - June 2010
Education
September 2001 - June 2010
Publications
Publications (73)
Background
Numerous insect species undertake long-distance migrations on an enormous scale, with great implications for ecosystems. Given that take-off is the point where it all starts, whether and how the external light and internal circadian rhythm are involved in regulating the take-off behaviour remains largely unknown. Herein, we explore this...
Nutrition is a limiting feature of species evolution. The differences in nutritional requirements are the evolutionary result of differential adaptations to environmental changes, explaining differences in their ecological traits. Cnaphalocrocis medinalis and Cnaphalocrocis exigua, two related species of rice leaffolders, have similar morphology an...
Odorant-binding proteins (OBPs) play important roles in the insect olfactory system since they bind external odor molecules to trigger insect olfactory responses. Previous studies have identified some plant-derived volatiles that attract the pervasive insect pest Cnaphalocrocis medinalis (Lepidoptera: Pyralidae), such as phenylacetaldehyde, benzyl...
Rice leaf folder, Cnaphalocrocis medinalis (Guenée), is one of the most serious pests on rice. At present, chemical control is the main method for controlling this pest. However, the indiscriminate use of chemical insecticides has non-target effects and may cause environmental pollution. Besides, leaf curling behavior by C. medinalis may indirectly...
Different Cry toxins derived from Bacillus thuringiensis (Bt) possess different insecticidal
spectra, whereas insects show variations in their susceptibilities to different Cry toxins. Degrada�tion of Cry toxins by insect midgut extracts was involved in the action of toxins. In this study, we
explored the processing patterns of different Cry toxins...
Rice leaffolder (Cnaphalocrocis medinalis) is an important insect pest in paddy fields. Due to their essential role in the physiology and insecticidal resistance, ATP-binding cassette (ABC) proteins were studied in many insects. In this study, we identified the ABC proteins in C. medinalis through genomic data and analyzed their molecular character...
Introduction
The insect gut harbors numerous microorganisms that may have functions in development and reproduction, digestion, immunity and protection, and detoxification. Recently, the influence factors on gut microbiota were evaluated in the rice leaffolder Cnaphalocrocis medinalis , a widespread insect pest in paddy fields. However, the relatio...
Gut microbes in insects may play an important role in the digestion, immunity and protection, detoxification of toxins, development, and reproduction. The rice leaffolder Cnaphalocrocis medinalis (Guenée) (Lepidoptera: Crambidae) is a notorious insect pest that can damage rice, maize, and other gramineous plants. To determine the effects of host pl...
Miniaturization has occurred in many animal lineages, including insects and vertebrates, as a widespread trend during animal evolution. Among Hymenoptera, miniaturization has taken place in some parasitoid wasp lineages independently, and may have contributed to the diversity of species. However, the genomic basis of miniaturization is little under...
Midgut juice plays an important role in food digestion and detoxification in insects. In order to understand the potential of midgut juice of Cnaphalocrocis medinalis (Guenée) to degrade Bt proteins, the enzymatic activity of midgut juice and its degradation of Bt proteins (Cry2A, Cry1C, Cry1Aa, and Cry1Ac) were evaluated in this study through prot...
The rice leaffolder Cnaphalocrocis exigua (Crambidae, Lepidoptera) is an important agricultural pest that damages rice crops and other members of related grass families. C. exigua exhibits a very similar morphological phenotype and feeding behavior to C. medinalis, another species of rice leaffolder whose genome was recently reported. However, geno...
The rice leaffolder, Cnaphalocrocis medinalis Guenée (Crambidae, Lepidoptera), is an important agricultural pest that causes serious losses of rice production in rice-growing regions with high humidity and temperature. However, a lack of genomic resources limits the in-depth understanding of its biological characteristics and ecological adaptation....
The fall armyworm (Spodoptera frugiperda) is a lepidopteran insect pest that causes huge economic losses. This notorious insect pest has rapidly spread over the world in the past few years. However, the mechanisms of rapid dispersal are not well understood. Here, we report a chromosome‐level assembled genome of the fall armyworm, named the ZJ‐versi...
Midgut extracts play crucial roles in food digestion and detoxification. We evaluated the effect of pH on the profiles of the midgut extracts in rice leaffolder, Cnaphalocrocis medinalis and the degradation of activated Bt-toxins by the midgut extracts under different pH conditions. Total protease activity increased slightly with the increase with...
The bacterial community living in the insect gut may play an important role in nutrition, immunity and protection, detoxification of toxins, and inter- and intra-specific communication. Rice leaffolder Cnaphalocrocis medinalis (Guenée) (Lepidoptera: Crambidae) is a notorious pest in rice, and the diversity of the gut bacteria of C. medinalis across...
Trichogramma japonicum Ashmead (Hymenoptera: Trichogrammatidae) and Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) are important parasitoids of Lepidopteran pests and are used for biological control in rice fields. In this study, the response of two of these parasitoids to four insecticides (chlorpyrifos, chlorantraniliprole, em...
[目的] 筛选特定试验条件下二化螟(Chilo suppressalis)稳定表达的内参基因，为二化螟基因表达研究奠 定基础。[方法] 根据二化螟转录组测序结果挑选出11个候选基因，利用实时荧光定量PCR测定其在二化螟不同发 育历期、不同组织、温度处理、杀虫剂处理、取食不同饲料、取食不同水稻、dsRNA处理和混合样品的表达量， 利用RefFinder、BestKeeper、GeNorm和NormFinder等软件和ΔC t值对11个候选基因的稳定性进行评估。[结果] 5 种分析方法表明，在二化螟不同发育历期稳定性较高的内参基因是AK、RPL10和EF1，不同组织中稳定性较高的 内参基因是EF1、TUB和ACTB，不同温度下较稳定的内参基因为TUB、RPL10和EF1，杀虫剂处理样品中较稳定...
Chilo supprressalis is one of the most important rice pests that causes serious damage to production in the rice growth area of Asia. Vetiver grass (Vetiveria zizanioides) was previously found to effectively attract female adults of C. suppressalis laying eggs on vetiver leaves, while the larvae cannot complete their life cycles by feeding on vetiv...
[Objective] In order to understand the sublethal effect of chlorpyrifos and chlorantraniliprole on rice leaffolders Cnaphalocrocis medinalis, [Method]the development was observed and detoxification enzymatic activities were measured observed after treatments with sublethal concentration of insecticides (LC10 and LC25 ) for 72 h. [Results] In the tr...
Conservation biological control avoids the need for mass releases of costly agents and the risks associated with introducing exotic agents by promoting existing natural enemies. This is done by alleviating insecticide-induced mortality and by manipulating the habitat to provide resources such as nectar, but there is a dearth of information on the r...
The cover image, by Chenxi Wu et al., is based on the Research Article Sublethal effects of four insecticides on folding and spinning behavior in the rice leaffolder, Cnaphalocrocis medinalis (Guenée) (Lepidoptera: Pyralidae), DOI: 10.1002/ps.4753. Photo Credit: Yajun Yang.
Cnaphalocrocis medinalis (Guenée) is one of the important insect pests in rice field. Bt agents were recommended in the C. medinalis control and Bt rice is bred as a tactic to control this insect. However, the tolerance or resistance of insect to Bt protein is a main threat to the application of Bt protein. In order to investigate the response of C...
List of primers of genes for the validation of transcriptome data by qRT-PCR.
(DOCX)
Top 20 downregulated unigenes in the midgut of Cnaphalocrocis medinalis treated with Cry1C toxin.
(DOCX)
Top 20 upregulated unigenes in the midgut of Cnaphalocrocis medinalis treated with Cry1C toxin.
(DOCX)
Validation of transcriptome data by qRT-PCR.
The means of at least three biological replicates are presented as log2FC ± SE.
(TIF)
KEGG summary of Cnaphalocrocis medinalis response to Cry1C toxin.
(XLSX)
Carboxylesterase genes differently expressed in Cnaphalocrocis medinalis larvae treated with Cry1C toxin.
(DOCX)
Marasmia exigua (Butler) (Lepidoptera: Pyralidae) is one of the major rice leaffolders negatively affecting the rice production in the world. The growth and development of M. exigua was studied at seven constant temperatures (10, 15, 20, 25, 27, 30 and 35°C). The results showed that M. exigua eggs failed to hatch at 10°C and the larvae could not co...
[Objective]Increasing plant diversity is an effective way for sustainable pest control through trapping pests, protecting natural enemies. Host plants of rice leaffolder (Cnaphalocrocis medinalis) include rice and some graminaceous plants. The objective of this study is to develop a new strategy of C. medinalis control based on the preference of C....
Background:
Rice leaffolder, Cnaphalocrocis medinalis, is an important rice pest. The sublethal effects of chlorpyrifos, chlorantraniliprole, emamectin benzoate and spinosad were investigated on the folding and spinning behaviors of the third- to fifth- instar C. medinalis larvae (L3-L5) after insecticidal exposure on the second instar.
Results:...
[Objective]With the constant development of the sustainable rice pest management technologies, great progresses are expected to be made in the conservation of aquatic insects in paddy fields by controlling rice insect pests through ecological engineering technology. [Method]We investigated the effects of the ecological engineering technology on the...
Chemical pesticides play crucial roles in the management of crop diseases and pests. However, excessive and irrational use of pesticides has become a major concern and obstacle to sustainable agriculture. As a result, the quality and security of agricultural products are reduced, and the ecological and environmental integrities are threatened. Rece...
Cnaphalocrocis medinalis and Marasmia patnalis are important rice insect pests in Asia and have similar morphologic features and same feeding patterns. Understanding the molecular difference of the two leaffolders is helpful to their identification and clarification of their phylogenetic class in the Pyraloidea. In this study, we determined and ana...
Southern rice black-streaked dwarf virus (SRBSDV) is a new member of the genus Fijivirus and transmitted by whitebacked planthopper (WBPH), Sogatella furcifera (Horváth). The rice area affected by SRBSDV and the subsequent damages are increasing rapidly. In current study, we evaluated the effects of SRBSDV-infected plants on the ecological fitness...
Nitrogen is a critical factor for plant development and nitrogen input is one of the important tactics to enhance the development and yield of crops. Nevertheless, nitrogen input could influence the occurrence of insects positively or negatively. Nitrogen is also one of the main elements composing the insecticidal crystal (Cry) protein. Cry protein...
In order to evaluate the effects of Bt rice on the generation fitness of non-target pest at different nitrogen rates, as wall as the potential impact of Bt rice and nitrogen fertilizer levels on non-target pest, the brown plantthopper (BPH) (Nilaparvata lugens) and the whitebacked planthopper (WBPH) (Sogatella furcifera), were successively cultured...
The pink stem borer, Sesamia inferens (Walker) (Lepidoptera: Noctuidae), has gradually become a major threat to rice production in Asian rice growth area. Using reverse-transcription quantitative real-time PCR (qRT-PCR) to investigate gene expression of S. inferens under different conditions is a popular technique. However, numerous studies demonst...
China has a long history of rice cultivation, incorporating several cultural practices known to influence damage by insect pests. Transgenic Bt rice expresses lepidopteran-specific insecticidal proteins that primarily target lepidopteran insect pests. However, the effectiveness of Bt rice against target insect pests under different cultural regimes...
The specific primers of five species of endosymbiotic bacteria were designed to determine their numbers in three virulent populations of brown planthopper, Nilapavata lugens Stål, and to assess changes during adaptation to different resistant varieties using fluorescent quantitative PCR. The results showed that Chryseobacterium was the dominant bac...
The bioactivities of methyl eugenol (ME) against rice insect pests, the brown planthopper (BPH), Nilar-parvata lugens, the leaf folder (RLF), Cnaphalocrocis medinalis, the striped stem borer (SSB), Chilo sup-pressalis, and their major natural enemies, a predator Cyrtorhinus lividipennis and parasitoids Anagrusnilaparvatae and Trichogramma japonicum...
Abstract Rice leaffolders Cnaphalocrocis medinalis and Marasmia patnalis (Lepidoptera: Pyralidae) are important rice pests and morphologically related with same damage methods. The control region of mitochondrial DNA (mtDNA) in two rice leaffolders C. medinalis and M. patnalis were sequenced and analyzed. The control regions of the two rice leaffol...
The effects of rice plants infected by rice black streaked dwarf virus (RBSDV) on the host preference, duration of immature stages, sex ratio, and adult longevity and parasitic capacity of an egg parasitoid, Anagrus nilaparvatae Pang et Wang, of rice brown planthopper, Nilaparvata lugens Stål, were evaluated. Tests of response to plant volatiles us...
In this study, the brown planthopper (BPH), Nilaparvata lugens (Hemiptera: Delphacidae), cultured on Bt rice lines (T1C-19 with cry1C gene and T2A-1 with cry2A gene) and their parental rice MH63, were treated with a series of concentrations of triazophos and deltamethrin when they developed up to the third instar for the evaluation of the effects o...
Ecological engineering for pest management involves the identification of optimal forms of botanical diversity to incorporate into a farming system to suppress pests, by promoting their natural enemies. Whilst this approach has been extensively researched in many temperate crop systems, much less has been done for rice. This paper reports the influ...
In order to clarify the impacts of southern rice black-streaked dwarf virus (SRBSDV) infection on rice plants, rice planthoppers and natural enemies, differences in nutrients and volatile secondary metabolites between infected and healthy rice plants were examined. Furthermore, the impacts of virus-mediated changes in plants on the population growt...
The brown planthopper, Nilaparvata lugens (Stål), is one of the most important insect pests on paddy rice in tropical and temperate Asia. Overuse and misuse of insecticides have resulted in the development of high resistance to many different insecticides in this pest. Studies were conducted to evaluate the change of resistance level to four insect...
A population of rice brown planthopper (BPH) Nilaparvata lugens collected from a paddy field in Hangzhou was successively reared on susceptible rice Taichung Native 1 (TN1) in a laboratory free from insecticides for more than 14 generations. The changes in susceptibility to insecticides and ecological fitness on different resistant rice varieties w...
Plant viruses transmitted by arthropods, as an important biotic factor, may not only directly affect the yield and quality of host plants, and development, physiological characteristics and ecological performances of their vector arthropods, but also directly or indirectly affect the non-vector herbivorous arthropods and their natural enemies in th...
Rice is one of the most important global crops but, despite suffering serious insect pest damage, has been less the subject of conservation biological control research compared with crops of importance in developed countries. Earlier studies of sesame (Sesamum indicum) as a nectar plant grown on the bunds around rice crop to promote natural enemies...
Southern rice black-streaked dwarf virus (SRBSDV) is a recently discovered member of the genus Fijivirus and it is transmitted by the rice whitebacked planthopper (WBPH), Sogatella furcifera (Horvath). It was found that SRBSDV infected vectors might contribute negatively to the WBPH population, although the longer nymphal period might benefit viral...
The structures of bacterial communities in the brown planthopper (BPH) Nilaparvata lugens (Stål) from different geographic and resistant virulent populations were analyzed by using denatured gradient gel electrophoresis (DGGE). Results showed that the bacterial communities in BPH nymph from the first to the fifth instars varied with nymphal growth...
The brown planthopper, Nilaparvata lugens Stål (Hemiptera: Delphacidae), exhibits geographic and temporal variations in its virulence and damage characteristics on cultivated rice varieties, so the potential ecological risk of the nontarget effectiveness of Bt rice on different brown planthopper populations should be addressed. The nontarget effect...
Rice black streak dwarf virus (RBSDV) is transmitted by the smaller brown planthopper (SBPH), Laodelphax striatellus (Fallen). Non-vector rice brown planthopper (BPH), Nilaparvata lugens (Stål), shares the same host rice plants with SBPH in paddy fields. The changes in nutritional composition of rice plants infected by RBSDV and the ecological fitn...
Planthopper (Delphacidae) pests have broken out frequently in Asia over the last decade leading to interest in enhancing the impact of natural enemies by growing nectar plants on the bunds that border rice fields. Such targeted use of plant diversity is popular in other crop systems but there is a marked lack of information on the scope for its use...
Reduction of noncrop habitats, intensive use of pesticides and high levels of disturbance associated with intensive crop production simplify the farming landscape and bring about a sharp decline of biodiversity. This, in turn, weakens the biological control ecosystem service provided by arthropod natural enemies. Strategic use of flowering plants t...
Effectiveness of four Cry toxins (Cry1Ac, Cry1Aa, Cry1Ab, and Cry1C) on Cnaphalocrocis medinalis (Guenée) (Lepidoptera: Pyralidae), collected from paddy fields in Jiaxing, Zhejiang Province, China, was evaluated in the laboratory. Bioassays showed that C. medinalis had different susceptibilities against four Cry toxins. The LC50 values of Cry1Ac, C...
We evaluated the effects of rice black streak dwarf virus (RBSDV)-infested rice plants on the ecological parameters and its relevant defensive and detoxification enzymes of white-backed planthopper (WBPH) in laboratory for exploring the relationship between RBSDV and the non-vector planthopper. The results showed that nymph survival rate, female ad...
The growth and reproduction of rice leaffolder, Cnaphalocrocis medinalis, fed on an artificial diet were studied. The results showed that the larvae were able to grow and pupate on the artificial diet. The durations of larvae and pupas were 28.1 d and 10.1 d, postponed 6.1 d and 1.7 d respectively compared with those reared with rice leaves. The nu...
The growth and reproduction of rice leaffolder, Cnaphalocrocis medinalis, fed on an artificial diet were studied. The results showed that the larvae were able to grow and pupate on the artificial diet. The durations of larvae and pupas of C. medinalis on the artificial diet were 28.1 d and 10.1 d, postponed 4.9 d and 1.7 d respectively, compared wi...
IntroductionBackground to ‘Green Plant Protection’Case StudiesConclusion
AcknowledgementsReferences
Transgenic crops that produce Bacillus thuringiensis (Bt) toxins are grown widely for pest control, but insect adaptation can reduce their efficacy. The genetically modified Bt toxins Cry1AbMod and Cry1AcMod were designed to counter insect resistance to native Bt toxins Cry1Ab and Cry1Ac. Previous results suggested that the modified toxins would be...
