scholarly journals Populasi Hama Wereng Batang Coklat (Nilaparvata lugens Stal.), Keragaman Musuh Alami Predator Serta Parasitoidnya Pada Lahan Sawah Di Dataran Rendah Kabupaten Indramayu

Agrologia ◽  
2017 ◽  
Vol 6 (1) ◽  
Author(s):  
Martua Suhunan Sianipar ◽  
Andang Purnama ◽  
Entun Santosa ◽  
R.C. Hidayat Soesilohadi ◽  
Wahyu Daradjat Natawigena ◽  
...  
Keyword(s):  
Integrated Pest Management ◽  
Pest Management ◽  
Diversity Index ◽  
Population Decline ◽  
Nilaparvata Lugens ◽  
Uniform Field ◽  
Wiener Diversity Index ◽  
Rice Pest ◽  
Nilaparvata Lugens Stål ◽  
Brown Plant Hopper

Population of brown plant hopper (Nilaparvata lugens Stal) is one of the major rice pest that is threatening rice production in Indramayu. Integrated pest management is needed to control the population of brown plant hopper (BPH). To construct effective strategy of Integrated Pest Management, a survey to obtain information about the population of BPH and the diversity of its natural enemies predator and parasitoid is required. The result of the survey showed that fluctuation of BPH population was evidence. BPH occurs from the 1st week of observation and the population was rising until the 5th week of observation and hence the population declined until the 12th week of observation. This population decline was caused by BPH’s live cycle followed the growth phase of rice plant. Correlation between climate factors and fluctuation of BPH population was not significant. Based on Shanon-Wiener diversity index analysis, the diversity of natural predators of BPH was medium with the value of H’ of 1,83 due to  uniform field condition

scholarly journals Fluktuasi Populasi Serangga Wereng Batang Coklat (Nilaparvata lugens) Pada Lahan Sawah Di Kabupaten Kerawang Jawa Barat

Agrologia ◽  
2018 ◽  
Vol 7 (2) ◽  
Author(s):  
Martua Suhunan Sianipar
Keyword(s):  
Regression Analysis ◽  
Natural Enemy ◽  
Diversity Index ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Population Fluctuation ◽  
Plant Pests ◽  
Nilaparvata Lugens Stål ◽  
Experimental Plots

Brown Planthopper (Nilaparvata lugens Stal.) is a main pest of paddy. The purpose of this research is to study the population of Brown Planthopper and the natural enemy. The method of this research using survey. Survey was conducted in three experimental plots at JatisariSubdistrict, Karawang District, West Javaand in the greenhouse of the Department of Plant Pests and Deseases, Faculty of Agriculture,  Universitas Padjadjaran. The sample were collected by systematically diagonal using yellow stiky trap and manually or visual counting. The result showed population fluctuation BPH below the economy line where is temperature, humidity and rainfall did not significantly effect to the BPH population. It was indicated by the regression analysis of each temperature Y= (- 24.225 + 1.008 X1 ; R2 =0,020; P/Sign = 0.660),  Humidity  (Y=- 32.337 + 0.424 X2; R2  = 0,124; P/ Sign  = 0.261) and Rainfall (Y=1.707 + 0.090 X3 ; R2  = 0.050; P/ Sign = 0.487). There is a relation between temperature, humidity and rainfall to BPH (Y = - 123 + 2.685 T + 0.649 RH - 0.14 CH; R2 = 0.236; P/ Sign = 0.516) dit not significantly because as the value of significance (P = Sign)  > 0.05.8. The diversity index was moderate 1.88

scholarly journals Effects of elevated CO2 on resistant and susceptible rice cultivar and its primary host, brown plant hopper (BPH), Nilaparvata lugens (Stal)

2020 ◽  
Author(s):  
Sengottayan Senthil-Nathan
Keyword(s):  
Elevated Co2 ◽  
Insect Pests ◽  
Rice Cultivar ◽  
Nilaparvata Lugens ◽  
Carbon Accumulation ◽  
Rice Cultivars ◽  
Ambient Conditions ◽  
Primary Host ◽  
Nilaparvata Lugens Stål ◽  
Brown Plant Hopper

Abstract Elevated CO2 has positive response on plant growth and negative response on insect pests. As a contemplation, the feeding pattern of the brown plant hopper, Nilaparvata lugens Stål on susceptible and resistant rice cultivars and their growth rates exposed to elevated CO2 conditions were analyzed. The elevated CO2 treatment showed significant differences in percentage of emergence and rice biomass that were consistent across the rice cultivars, when compared to the ambient conditions. Similarly, increase in carbon and nitrogen ratio of leaves and alterations in defensive peroxidase enzyme levels were observed, but was non-linear among the cultivars tested. Lower survivorship and nutritional indices of N. lugens were observed in conditions of elevated CO2 levels over ambient conditions. Results were nonlinear in manner. We conclude that the plant carbon accumulation increased due to elevated CO2, causing physiological changes that decreased nitrogen content. Similarly, elevated CO2 increased insect feeding, but did not alter other variables such as their biology or reproduction.

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