Effects of Population Density and Host Availability on the Migration Process of Brown Planthopper Fed Using Susceptible and Resistant Rice Varieties (Pengaruh Kepadatan Populasi Dan Ketersediaan Pakan Terhadap Proses Migrasi Wereng Batang Cokelat Pada Padi Varietas Rentan Dan Tahan) (original) (raw)
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Journal of Applied and Natural Science, 2014
The present study on the effect of variety and planting date of rice on population of natural enemies of brown planthopper, Nilaparvata lugens (Stal) showed that during August, the mean population of spiders was statistically on par on CSR 30 and PR 114. The population differed with dates and was significantly (p=0.05) higher (9.0/10 hills) in D2 during 2011 only. There was no significant difference in the population of spiders on two varieties and dates of transplanting during September 2011 only. However, significantly higher population of spiders was recorded in variety PR 114 (21.65/10 hills) and D2 (20.52/10 hills) than on CSR 30 (13.67/10 hills) and D1 (14.80/10 hills) during September, 2012. The mean population of spiders did not differ significantly with the dates during October, 2011 and 2012. However, it was significantly higher on variety PR 114 (27.65/10 hills) than on CSR 30 during both the crop seasons. Mirid bugs did not appear in the month of August, 2011 and 2012 wh...
Scientific reports, 2017
In this study, we evaluated the adaptability of the small brown planthopper (SBPH), Laodelphax striatellus (Hemiptera: Delphacidae) to four rice cultivars including Shengdao13 (SD13), Shengdao14 (SD14), Shengdao15 (SD15), and Zixiangnuo (ZXN) using the age-stage, two-sex life table with a simplified method for recording egg production (i.e., every five days vs. daily). The intrinsic rate of increase (r) of the SBPH was the highest (0.1067 d(-1)) on cultivar SD15, which was similar to the rate on SD14 (0.1029 d(-1)), but was significantly higher than that occurring on ZXN (0.0897 d(-1)) and SD13 (0.0802 d(-1)). The differences of the finite rate of increase (λ) on the four rice cultivars were consistent with the r values. Population projection predicted an explosive population growth of the SBPH occurring in a relatively short time when reared on SD14 and SD15. These findings demonstrated that the SBPH can successfully survive on the four rice cultivars, although there were varying h...
Pakistan Journal of Zoology
Authors' Contribution CMR, MR and BA conceived the idea. UBK, SI, MZ collected data for yield and yield attributes. MR, BA and HL collected data of Nilaparvata lugens incidence in field and fertilizer responsive development of Nilaparvata under lab conditions. CMR, MR, BA, MZ and MA analyzed the data. MR, BA, MR and MA wrote the draft. MR and MA writing review and editing.
Jurnal Perlindungan Tanaman Indonesia, 2020
An extensive study about egg parasitoid biodiversity in different plant growth stages is an important need. This study was aimed to determine the diversity and abundance of egg parasitoids Nilaparvata lugens on different rice growth stages in Saketi, Pandeglang, Banten. The parasitoids sample was collected three times with two days interval sampling in three villages, i.e. Sodong (location I), Sindanghayu (location II), and Sukalangu (location III) from February to September 2018. Ten plants (as bait: rice that infected by N. lugens eggs) were put during two days along the transect line (100 meters) with 10 m space in between. The findings revealed that the abundance richness (S), the diversity index (H'), and similarity (J') of egg parasitoids of N. lugens were higher in the location I than those in the locations II and III. The study indicated that the diversity and abundance of egg parasitoids of N. lugens decreased in the generative phase of rice growth.
Environmental Entomology, 1986
Of 36 wild rices screened, 19 accessions were resistant or moderately resistant to three biotypes of the brown planthopper, Nilaparvata lugens (Stal), and 9 were resistant or moderately resistant to at least one biotype. Resistant accessions were nonpreferred and N. lugens caged on resistant accessions had low food ingestion rates, slow nymphal development, reduced longevity, low fecundity, and consequently low populations. Two wild rice species decreased the percent hatchability of N. lugens eggs. Some moderately resistant accessions have tolerance to N. lugens, as indicated by low plant damage ratings and plant loss and high percentage N. lugens survival and weight gain. Wild rices are possible sources of new genes for N. lugens resistance.
Journal of Scientific & Industrial Research, 2010
Multiple linear regression models (pest-weather models) were developed between monthly mean brown planthopper (BPH), Nilaparvata lugens light trap catches and monthly mean values of minimum temperature (Tmin), maximum temperature (Tmax), morning relative humidity (RH 1 ) and evening relative humidity (RH 2 ) observed at Maruteru, Andhra Pradesh during 2000-2007 kharif seasons. Comparison between predicted and observed BPH light trap catches at Nellore (kharif 2004 and 2005), Ragolu (kharif 2003-2007) and Rajendranagar (kharif 2005 and 2007) evinced very high level of congruence between them, thereby validating agro-ecological zoning of BPH incidence in Andhra Pradesh. Knowledge of BPH incidence levels in different zones would facilitate strategic decisions with regard to selection of crop cultivars and management practices, and prediction of probable life of resistant cultivars.
Jurnal Perlindungan Tanaman Indonesia, 2017
ABSTRACTThe rice brown planthopper, Nilaparvata lugens (Hemiptera: Delphacidae) is an important pest of rice. Since at the early stage, this pest is infested by parasitoids, but most cultural practices do not consider the existences of parasitoids in rice ecosystem. This study was aimed to determine the level of parasitism on N. lugens with regard to the time of the day. This information would be useful to minimize the effect of insecticide application to the parasitoids. Trapping of egg parasitoids in rice ecosystem was conducted every two hours from 05.00 a.m. until 04.00 p.m. Parasitism occured as early as at 05.00 a.m. (12.26% of the total parasitoid found), reached the peak abundance at 11.00 a.m. (36.13%), and decreased at 01.00 p.m. The parasitism level varied from 1.12 to 8.51% at 66 days after planting. The highest number of parasitoids and the highest parasitism level occured when trapping was conducted between 11.00 a.m.−01.00 p.m.. Before and after this period of time,...
Journal of entomology and zoology studies, 2019
Brown plant hopper, Nilaparvata lugens (Stal.), one of the major insect pest in paddy has developed resistance against the majority of insecticides which has created a new challenge for its management. Growing of BPH resistant varieties is an economical, environmentally safe and effective strategy to manage this pest. In the present study, 105 Plant Hopper Screening (PHS) and 25 Multiple Resistant Screening Trial (MRST) of rice genotypes were screened in the glasshouse conditions along with resistant (PTB-33) and susceptible checks Taichung Native-1(TN1). The standard seedbox screening method was used for the bulk screening of entries. The rating scale and level of resistance were adopted from the standard evaluation system for rice but the ranges for percent dead seedling were constructed to facilitate the rating based on percent seedling mortality due to BPH damage. According to observations, entries RP 2068-18-3-5, RP 6121Bphk17-2, IR 73382-80-9-3-13-2-2-1-3-B (HWR-16), IR 77390-...
Rice Brown Plant hopper, Nilaparvata lugens (Stal) (BPH) management strategy at present involves traditional approaches like, Using Resistant Varieties, Cultural Management and Use of Insecticides. Natural Biological Control is considered only in delaying insecticide application at favorable times and Use of Bio-Agents is non-existent. Varietal resistance could not achieve desired results due to inefficient and inadequate screening and breeding techniques presently employed to transfer highly complex multi-gene multi QTL based trait. This can possibly be improved by following traditional approach of screening and selecting plants directly under field conditions. Leaving alley-ways, optimum nitrogen application, optimum plant population are largely followed in many countries. New possibilities by changing the rice planting design can be experimented and exploited. Insecticide use is the major tactic followed in almost all the countries with inevitable consequences of natural enemy destruction and more importantly insecticide resistance development and pest resurgence. The scope of utilizing natural enemies as a major tactic appeared to be remote. Alien sources like lectins or Similar chemicals which can directly affect BPH, Alien organisms or the chemicals that disrupt the physiological base of Galbachina, Alien genes which can produce compounds related to insect molting hormones or juvenile hormones, in rice plants are the distant goals but worthy of initiation. After quantitative assessment of water vapor pressure and humidity on BPH, Chemicals interfering with water balance in BPH and even suitable dusts to mechanically disrupt insect body wall seem to have scope in future.
Resistance Of Local Rice Genotypes Against Brown Planthopper Pest In Kuantan Singingi Regency
JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA)
Produksi beras dunia hilang 25% setiap tahun karena kerusakan yang disebabkan oleh hama serangga, sepeti wereng. Salah satu upaya untuk mengendalikan hama wereng batang coklat yaitu dengan menggunakan genotipe lokal yang tahan. Penelitian ini bertujuan untuk mengetahui intensitas serangan dan tingkat ketahanan dari dua puluh empat genotipe lokal Kabupaten Kuantan Singingi terhadap hama wereng batang coklat. Penelitian ini menggunakan metode Rancangan Acak Lengkap satu faktor dengan empat ulangan. Faktor perlakuan yang dicobakan adalah 24 genotipe padi local Kabupaten Kuantan Singingi ditambah satu varietas yang tahan (Inpari 13) dan satu varietas yang rentan (TN1). Hasil penelitian menunjukan bahwa seluruh genotipe yang diuji 100% terserang wereng batang coklat dengan tingkat intesitas serangan yang berbeda-beda. Berdasarkan tingkat intensitas serangan ditemukan katagori ringan dan berdasarkan SES IRRI 2013 ditemukan genotipe dengan kriteria tahan, yaitu pada genotipe Padi Sironda P...