Simulation Analysis of Brown Planthopper (Nilaparvata lugens) Population Dynamics on Rice in the Philippines

1987 ◽  
Vol 24 (1) ◽  
pp. 87 ◽  
Author(s):  
J. Holt ◽  
A. G. Cook ◽  
T. J. Perfect ◽  
G. A. Norton
Keyword(s):  
Population Dynamics ◽  
Simulation Analysis ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
The Philippines

scholarly journals Seasonal variation in population and biochemical contents of brown planthopper, Nilaparvata lugens (Stål)

2022 ◽  
Vol 43 (1) ◽  
pp. 52-58
Author(s):  
S. Narayana ◽  
◽  
S. Chander ◽  
S. Doddachowdappa ◽  
S. Sabtharishi ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Rainy Season ◽  
Brown Planthopper ◽  
Chemical Compounds ◽  
Nilaparvata Lugens ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
Water Soluble Carbohydrates ◽  
Nilaparvata Lugens Stål ◽  
Brown Plant Hopper

Aim: The present study was undertaken on population dynamics and estimation of protein, water-soluble carbohydrates and glycogen contents in the brown planthopper, Nilaparvata lugens to explore their migratory behaviour. Methodology: Brown planthopper populations were monitored and collected using sweep nets from 23rd standard meteorological week (SMW) to 47th SMW during 2017 and 2018 rainy seasons to understand population dynamics of the pest. The protein, water-soluble carbohydrates and glycogen contents were estimated from the pest samples collected during 36th to 44th SMW in 2017 and 2018 rainy seasons. Results: Brown planthopper population were not observed in rice farm during 23rd SMW to 28th SMW during two years of study. However, macropterous form of the pest first appeared in the farm during 29th SMW and peaked during 43rd SMW. Thereafter, population declined and disappeared after 47th SMW during both the years. Water-soluble carbohydrates and glycogen contents varied significantly different weeks which remained low during 36th-39th SMW, however, increased gradually towards the end of the rainy season 2017 and 2018. On the other hand, protein content significantly varied among different weeks unlike the trend of water-soluble carbohydrates and glycogen. Interpretation: The study revealed the absence of brown plant hopper during summer season preceding rainy season, and the accumulation of bio-chemical compounds towards the end of rainy season under Delhi environment is perhaps suggestive of migration of the pest from unknown areas during rainy season to Delhi and likely preparedness of the pest for emigration to safer areas from Delhi, respectively.

Genetic analysis of brown planthopper biotypes using random amplified polymorphic DNA-polymerase chain reaction (RAPD-PCR)

1995 ◽  
Vol 16 (1) ◽  
pp. 27-33 ◽  
Author(s):  
K. A. Shufran ◽  
M. E. Whalon
Keyword(s):  
Polymerase Chain Reaction ◽  
Dna Polymerase ◽  
Random Amplified Polymorphic Dna ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
The Philippines ◽  
Rice Cultivars ◽  
Chain Reaction ◽  
Rapd Pcr ◽  
Polymerase Chain

AbstractRandom amplified polymorphic DNA (RAPD) amplified by the polymerase chain reaction (PCR) was used to estimate the relatedness of three biotypes of brown planthopper, Nilaparvata lugens (Stål), from the Philippines. Each individual brown planthopper had a unique set of RAPD bands, but no bands were diagnostic for any one biotype. Brown planthopper types 1, 2 and 3 were genetically homogeneous. This supports results of other studies which conclude that brown planthopper biotypes are not sub-specific categories, but merely represent individual variation for virulence to rice cultivars.

The role of ants, especially the fire ant, Solenopsis geminata (Hymenoptera: Formicidae), in the biological control of tropical upland rice pests

2002 ◽  
Vol 92 (5) ◽  
pp. 431-437 ◽  
Author(s):  
M.J. Way ◽  
G. Javier ◽  
K.L. Heong
Keyword(s):  
Biological Control ◽  
Upland Rice ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
The Philippines ◽  
Solenopsis Geminata ◽  
Rice Plants ◽  
Rice Pests ◽  
Predator Complex

AbstractPredatory ants are omnipresent year-round in upland (dryland) rice fields in the Philippines. At least 14 species were identified of which the very aggressive Solenopsis geminata (Fabricius) and also Tapinoma sp. nr indicum Forel usually predominated. Some highly aggressive species, notably Pheidolegeton spp. and Bothriomyrmex dalyi Forel were localized. Solenopsis geminata flourished within many fields, not only during the crop season but also throughout dry season fallows where they remained aggressively predatory. Rice plants infested with brown planthopper Nilaparvata lugens (Stål) were usually found within a few hours and S. geminata workers were quickly recruited to N. lugens aggregates. Predation was usually incomplete and workers began to solicit the few remaining late instar or adult N. lugens survivors. These oviposited but no second generation nymphs appeared. There was a surge of recruited ants at the time of N. lugens egg hatch when surviving adults were also killed. Initially, S. geminata alone killed N. lugens aggregates less quickly than with the whole predator complex but ultimately its sole effect was as great as that of the complex. Scattered N. lugens adults, corresponding to numbers that initially colonize rice plants, were eliminated as quickly by S. geminata alone as by the predator complex. Tapinoma indicum occurring separately or with S. geminata on the same plant contributed to predation of N. lugens especially on young nymphs. Solenopsis geminata attacked other insects on rice notably leaffolders of which 97% mortality was recorded when they were exposed throughout egg and larval stages. The role of S. geminata as a predator of upland rice pests is discussed in the context of known biological control of pests of non-rice dryland crops in the tropics and sub-tropics by S. geminata and other Solenopsis spp.

scholarly journals Migration dynamics of an important rice pest: the brown planthopper (Nilaparvata lugens) across Asia – insights from population genomics

2020 ◽  
Author(s):  
J. P. Hereward ◽  
X.H. Cai ◽  
A. M. Matias ◽  
G. H. Walter ◽  
C. X. Xu ◽  
...  
Keyword(s):  
Population Genomics ◽  
Insect Pests ◽  
Sequence Data ◽  
Brown Planthopper ◽  
Mainland China ◽  
Nilaparvata Lugens ◽  
The Philippines ◽  
Whole Genome Sequence ◽  
Regional Dynamics ◽  
Migration Dynamics

AbstractBrown planthoppers (Nilaparvata lugens) are the most serious insect pests of rice, one of the world’s most important staple crops. They reproduce year-round in the tropical parts of their distribution, but cannot overwinter in the temperate areas where they occur, and invade seasonally from elsewhere. Decades of research has not revealed their source unambiguously. We therefore sequenced the genomes of brown planthopper populations from across temperate and tropical parts of their distribution and show that the Indochinese peninsula is the major source of migration into temperate China. The Philippines, once considered a key source, is not significant, with little evidence for their migration into China. We find support for immigration from the west of China contributing to these regional dynamics. The lack of connectivity between the Philippines and mainland China explains the different evolution of Imidacloprid resistance in these populations. This study highlights the promise of whole genome sequence data to understand migration when gene flow is high – a situation that has been difficult to resolve using traditional genetic markers.

Screening of rice genotypes for resistance to the brown planthopper, Nilaparvata lugens Stål

2012 ◽  
Vol 40 (4) ◽  
pp. 502-508 ◽  
Author(s):  
M. P. Ali ◽  
Salem S. Alghamdi ◽  
M. A. Begum ◽  
A. B. M. Anwar Uddin ◽  
M. Z. Alam ◽  
...  
Keyword(s):  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Rice Genotypes
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