scholarly journals The toxicity and effectiveness of nanoemulsion formulas from Piper retrofractum essential oil against brown plant hopper (Nilaparvata lugens Stål)

2020 ◽  
Vol 1450 ◽  
pp. 012055
Author(s):  
N S P Nuryanti ◽  
Jurayrah ◽  
L Budiarti
Keyword(s):  
Essential Oil ◽  
Nilaparvata Lugens ◽  
Piper Retrofractum ◽  
Nilaparvata Lugens Stål ◽  
Brown Plant Hopper

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.

Prediction and characterization of novel microRNAs from brown plant hopper,Nilaparvata lugens(Stål) (Hemiptera: Delphacidae)

2013 ◽  
Vol 43 (4) ◽  
pp. 224-235 ◽  
Author(s):  
R. Asokan ◽  
K.B. Rebijith ◽  
H.H. Ranjitha ◽  
H.K. Roopa ◽  
V.V. Ramamurthy
Keyword(s):  
Nilaparvata Lugens ◽  
Nilaparvata Lugens Stål ◽  
Brown Plant Hopper

scholarly journals Broadening Genetic Base of Rice and Identification of Pre-Breeding Lines for Resistance to Brown Plant Hopper, Nilaparvata lugens (Stål.)

2021 ◽  
pp. 76-80
Author(s):  
Prakash Chandra Rath ◽  
Lotan Kumar Bose ◽  
Nitiprasad Namdeorao Jambhulkar ◽  
Hata Nath Subudhi ◽  
Meera Kumari Kar
Keyword(s):  
Quantitative Traits ◽  
Basic Research ◽  
Nilaparvata Lugens ◽  
Hybrid Breeding ◽  
Breeding Lines ◽  
Qualitative And Quantitative ◽  
Glasshouse Condition ◽  
Nilaparvata Lugens Stål ◽  
Moderately Resistant ◽  
Brown Plant Hopper

Pre-breeding includes basic research to achieve wide crosses and facilitate the use of exotic materials or wild relatives for both qualitative and quantitative traits. The main objective is to provide breeders with more ‘attractive’ PGR that are easier to use, i.e. resistance sources in acceptable genetic background; or inbreeding tolerant forms of out crossing species for hybrid breeding. Forty seven pre-breeding lines were evaluated against Brown Plant Hopper under glasshouse condition over a period of two years (2018 and 2019). Out of these, two pre-breeding lines were moderately resistant to BPH having score 3. Two pre-breeding lines were moderately susceptible to BPH having score 5, five lines were susceptible having score 7 and rest thirty nine pre-breeding lines were highly susceptible to BPH with a score of 9.

scholarly journals CHARACTERISTICS AND TOXICITY OF NANOEMULSION FORMULATION OF PIPER RETROFRACTUM AND TAGETES ERECTA EXTRACT MIXTURES

2018 ◽  
Vol 18 (1) ◽  
pp. 1 ◽  
Author(s):  
Ni Siluh Putu Nuryanti ◽  
Edhi Martono ◽  
Endang Sri Ratna ◽  
Dadang .
Keyword(s):  
Brown Planthopper ◽  
Particle Morphology ◽  
Nilaparvata Lugens ◽  
Low Energy ◽  
Tagetes Erecta ◽  
Contact Method ◽  
Botanical Insecticide ◽  
Piper Retrofractum ◽  
Nilaparvata Lugens Stål ◽  
Triton X

Characteristics and Toxicity of Nanoemulsion Formulations of Piper retrofractum and Tagetes erecta Extract Mixtures. Nanotechnology has been used in the developing of botanical insecticide formulation for improving its stability and effectiveness. The research was aimed to make nanoemulsion formulations of Piper retrofractum fruits and Tagetes erecta flowers extracts and to evaluate their toxicity against brown planthopper (Nilaparvata lugens [Stål]) nymphs. The development of nanoemulsion formulaions was carried out by using the low energy method with inversion phase emulsification.  The toxicity of the four formulations was tested against brown planthopper nymphs using a contact method. Four nanoemulsion formulations were obtained.  The study showed that in the developing of the formulations, the type and level of emulsifier materials affected the physical characteristics of formulas, such as stability, surface tension, viscosity, particle size, and particle morphology. The nanoemulsion formulation containing 1% of the mixture of P. retrofractum fruits and T. erecta flowers extracts, 1.75% Triton X-100 emulsifier showed the highest toxic on the brown planthopper nymph, with the LC95 value was 0.15%.  The study indicates that nanoemulsion formulation of P. retrofractum and T. erecta extracts are potential to be developed as botanical insecticide to control brown planthopper of rice.

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