Silicon suppresses insect pests such as the stem borer, brown planthopper, rice green leafhopper, and whitebacked planthopper, and non-insect pests such as leaf spider and mites. Abigail M. Hayes, ... Laura Corley Lavine, in Advances in Insect Physiology, 2019. The brown planthopper also damages rice by transmitting ragged stunt virus and grassy stunt virus. Mol Plant. Phenylalanine ammonia-lyase (PAL) is a key enzyme involved in plant defense against pathogens, but the role of PAL in insect resistance is still poorly understood. Michael J. Stout, in Integrated Pest Management, 2014. The amino acid asparagine is a feeding stimulant for the brown planthopper, and levels of sulphur-containing amino acids influence planthopper performance (Horgan, 2009). All of the backcross lines of Marquis, each with its own resistance gene, have been used as host differentials to identify races of pathogens. The rice brown planthopper (BPH), Nilaparvata lugens (Stål) (Hemiptera: Delphacidae), is one of the most serious pests of rice in Asia. This insect uses its stylet to pierce the leaf sheath phloem sap and The genetics of resistance to insect-pests is most important for the development of insect-pest resistant varieties. BPH is a small brown insect found mainly on the base of rice plants above the water level. 1989); in high concentrations, the parasite inhibits the conidial germination and hyphal growth of its host, apparently through competition for nutrients. Identification and pyramiding BPH-resistance genes is an economical and effective solution to increase the resistance level of rice varieties. Background: Brown planthopper (BPH) is the most destructive insect in rice production. These include eight First Desaturase family genes, one cytochrome b5 fused desaturase gene (Nlug-Cytb5r) and one Sphingolipid Desaturase gene (Nlug-ifc). The Si content of the rice stem was negatively correlated with the number of larvae bored into the stem and the amount of feces (Table 7.62). Dark types have body color of brown or dark brown; light color types have tawny body color. The Brown Planthopper (BPH) Nilaparvata lugens (Stål) has become a number one threat to tropical rice production in many parts of Asia in the last three decades (Dale, 1994). (1987) studied the inheritance in Indian mustard and suggested the W1W1 gene symbol for non-waxiness and w1w1 gene for waxiness. Be careful of the outbreak of Brown planthopper (BPH) due to drought. Brown planthopper in West Bengal, India. The brown planthopper (BPH), Nilaparvata lugens Stal (Hemiptera: Delphacidae) is a major insect pest that causes enormous yield loss in rice, Oryza sativa L., in Asia. Genomic information for BPH is currently unavailable, and, therefore, transcriptome and expression profiling data for this species are … While studying the inheritance in aphid tolerant cultivars, non-waxy mutant RC 1425 and susceptible Prakash cultivars of B. juncea, Yadav et al. The newly developed cultivars having the Sub1 QTL have more than 97% of the genome from the recurrent varieties (Swarna, Sambha Mahsuri, BR11), except for the Sub1 region on chromosome 9, and provide enhanced submergence tolerance for up to 14 days to these varieties (Septiningsih et al., 2009). WALTER GAMS, ... KADRI PÕLDMAA, in Biodiversity of Fungi, 2004. Genome-Wide Characterization and Comparative Analysis of MYB Transcription Factors in. BPH causes serious damage to rice by sucking the rice phloem sap, ovipositing in rice tissues, and transmitting rice virus diseases such as grassy stunt virus and ragged stunt virus during its long-distance migration (Cabauatan et al., 2009). Developing haploid induction systems in indica rice: Various approaches to enhance anther culturability and haploids through chromosome elimination involving wide crosses, and the search for haploid inducer genes/stocks, should be given priority. 2013). Hawksworth (1981a) gives a long list of additional mycoparasites growing on conidial fungi. 2020 Aug 5;10(8):2653-2660. doi: 10.1534/g3.120.401372. Epub 2009 Dec 14. It infests and kills the rice … When the stem was extracted with water, the number of larvae that moved to the extract from the stem was smaller in the stem containing a higher Si. The large jaws of the stem borer gnawing rice with a high Si content would wear out more easily than that gnawing rice with a low Si content. In rice, a single gene, Bph-1, conferred resistance to brown planthopper in a variety IR 26 but this broke down within 2 years. 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