scholarly journals EFEK PENYIMPANAN TERHADAP VIRULENSI NUCLEAR POLYHEDROSIS VIRUS YANG DIAPLIKASIKAN PADA TANAMAN KEDELAI TERSERANG ULAT GRAYAK (Spodoptera litura Fabr. )

2001 ◽  
Vol 1 (1) ◽  
pp. 29-32
Author(s):  
Sudi Pramono
Keyword(s):  
Spodoptera Litura ◽  
Field Experiments ◽  
Nuclear Polyhedrosis Virus ◽  
Block Design ◽  
Control Techniques ◽  
Polyhedrosis Virus ◽  
One Year ◽  
Nuclear Polyhedrosis ◽  
And Control ◽  
Army Worm

One of the problem increased soybean production was Spodoptera litura (army worm), because army worm has been known to be resistant to many insec¬ticides.  Alternatif control techniques should be explored  to reduce population of the pest.  Nuclear Polyhedrosis Virus (NPV) could storage one or more year,  but must used technique cold storage so that not virulence decreased.  This experiment was conducted to study (1) NPV patho¬genicity to army worm in the field, and (2) the effect of storage on the pathogenicity of NPV to S.  litura.  The research consisted of two experiments i.e.  laboratory and field experiments.  Each experiment had  seven treatments arranged in a randomized completely block design.  Each treatment was replicated four times.  The results show  the highest mortality of S.  litura occurred in plot treated  with 1,0 x 107 PIBs /ml, the mortality was 48 to 49,33 spec/plot after ten days aplicated .  If comparative patogenicity the new and the old NPV was not significant.  Population of army worm decreased significantly by NPV and control.  So that patogenecity NPV storage  one  year as well as new NPV  against army worm.     

scholarly journals Pengujian Bahan Formulasi MsNPV ( Mythimna separata Nuclear Polyhedrosis Virus) terhadap Ulat Grayak Padi, Mythimna separata Walker di Lapangan

2016 ◽  
Vol 6 (1) ◽  
pp. 15
Author(s):  
Trisnaningsih Trisnaningsih ◽  
Arifin Kartohardjono
Keyword(s):  
Sea Level ◽  
Nuclear Polyhedrosis Virus ◽  
Block Design ◽  
Mythimna Separata ◽  
Life And Death ◽  
Randomized Block Design ◽  
Nuclear Polyhedrosis ◽  
And Control ◽  
Rice Plantation ◽  
Army Worm

The objective of these studies were to observe efficiency material formulations of MsNPV and the influence to rice plantation on different locations (Indramayu (3 m above sea level), Sukabumi (400m above sea level) and Bogor (250 m above sea level) to larvae of rice army worm. This study used randomized block design with 4 treatments consisted of 3 formulation materials (talc, kaolin and gypsum) and control in five replications. Observations were done to life and death larvae on 5, 10, 15 days after inoculation and leaf damaged. Data were analysed with DMRT. Results from this study indicated that material talc formulation was more effective because all the material was dissolve as compare to material kaolin and gypsum formulations while the material were precipitated. Utilize these three material formulations on three different locations above sea level gave the same impact to the mortality army worm larvae and also to the plant damage.

scholarly journals Biological Test of Formulation of Subculture Helicovepa armigera Nuclear Polihedrosis Virus (HaNPV) on Mortality of Spodoptera litura Larvae infested to cabbage (Brassica oleracea Var. capitata Linn.) Plantation

2015 ◽  
Vol 2 (1) ◽  
pp. 646
Author(s):  
Desy Efriyani Anggraeny Nasution ◽  
Mia Miranti ◽  
Melanie .
Keyword(s):  
Brassica Oleracea ◽  
Helicoverpa Armigera ◽  
Spodoptera Litura ◽  
Nuclear Polyhedrosis Virus ◽  
Insect Pests ◽  
Block Design ◽  
Economic Value ◽  
Helicoverpa Armígera ◽  
Polyhedrosis Virus ◽  
Nuclear Polyhedrosis

<p>Helicoverpa armigera Nuclear Polyhedrosis Virus (HaNPV) is one of the biological agents that could be used for the development of organic farming in Indonesia. One of the organic agricultural food products which have high economic value is cabbage, HaNPV effectif to control the population of several species of insect pests, can be used instead of synthetic insecticides in agricultural development efforts of organic cabbage. HaNPV formulation can be used as a way to maintain the virulence properties of the virus and facilitate the storage and application. The preparation of subculture HaNPV formulations was in liquid, powders, cornstarch and talk carrier material. The design experimental was used randomized block design consists single factor (type HaNPV formulation consisting of powder formulations, liquid formulation, formulation in cornstarch, and talc formulation including water formulation without virus as a control), with eight replications. The results showed that all of the formulations of subculture HaNPV causing larvae mortality at range 97.4% -100%. The highest mortality of larvae occurred in cabbage plants are protected by HaNPV carrier liquid and talk preparations by 100% each. <br /><strong></strong></p><p><strong>Keywords</strong>: Formulations Helicoverpa armigera Nuclear Polyhedrosis Virus (HaNPV), subculture, Spodoptera litura, Brassica oleracea Var. capitata Linn.</p>

EFFECTS OF LARVAL AGE ON SUSCEPTIBILITY OF SPODOPTERA LITURA (LEPIDOPTERA: NOCTUIDAE) TO SPODOPTERA LITURA MULTIPLE NUCLEAR POLYHEDROSIS VIRUS

2000 ◽  
Vol 132 (3) ◽  
pp. 337-340 ◽  
Author(s):  
M.D. Monobrullah ◽  
Masao Nagata
Keyword(s):  
Spodoptera Litura ◽  
Nuclear Polyhedrosis Virus ◽  
Actual Mechanism ◽  
Polyhedrosis Virus ◽  
Nuclear Polyhedrosis ◽  
Time Required ◽  
Lepidoptera Noctuidae ◽  
Host Development

Susceptibility of many insects to baculoviruses decreases with host development (Hochberg 1991), whereas the time required for infected hosts to die increases with larval age (Boucias et al. 1980; Bucher and Turnock 1983; Smits and Vlak 1988). The actual mechanism of this phenomenon, however, has not been established in many cases. The present study was undertaken to investigate the effect of larval age on the susceptibility of Spodoptera litura Fabricius to nuclear polyhedrosis virus (NPV) through oral and intrahaemocoelic routes of infection.

scholarly journals Effectiveness of Nuclear Polyhedrosis Virus and Bacillus thuringiensis alone and in Combination against Spodoptera litura (Fabricius)

2019 ◽  
Vol 51 (2) ◽  
Author(s):  
Sumaira Maqsood ◽  
Muhammad Afzal ◽  
Muhammad Saleem Haider ◽  
Hafiz Azhar Ali Khan ◽  
Muhammad Ali ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Spodoptera Litura ◽  
Nuclear Polyhedrosis Virus ◽  
Polyhedrosis Virus ◽  
Nuclear Polyhedrosis

scholarly journals Uji Efektivitas Konsentrasi Spodoptera litura – Nuclear Polyhedrosis Virus (SlNPV) JTM 97C Formulasi Bubuk Terhadap Larva Spodoptera litura Fabricius (Lepidoptera: Noctuidae) Pada Tanaman Kedelai

2019 ◽  
Vol 2 (2) ◽  
pp. 46
Author(s):  
M Novel Ghufron Syahroni ◽  
Nanang Tri Haryadi
Keyword(s):  
Spodoptera Litura ◽  
Nuclear Polyhedrosis Virus ◽  
Larval Instar ◽  
Crop Failure ◽  
Randomized Design ◽  
Pathogenic Virus ◽  
Hot And Humid Climates ◽  
Polyhedrosis Virus ◽  
Soybean Plants ◽  
Nuclear Polyhedrosis

Spodoptera litura (armyworm) is an important leaf pest that is polyphagic and has a broad range of hosts. Spodoptera litura is the main pest in soybean plants and can cause up to 50% damage and often results in decreased productivity and even crop failure. Spodoptera litura is widespread in areas with hot and humid climates from the subtropics to the tropics. S. litura pests attack cultivation plants in the vegetative and generative phases. The prospect of insect pathogens as a substitute for chemical insecticides is quite good in terms of their effectiveness and impact on the environment. Nuclear Polyhedrosis Virus (NPV) is one of the Baculoviridae viruses that infect the larval stage. Spodoptera litura Nuclear Polyhedrosis Virus (SlNPV) is a pathogenic virus that infects armyworms. SlNPV JTM 97C is an effective isolate in controlling larvae of Spodoptera litura. The larvae used in this study were larval instar 4, instar 5, and instar 6. The study was conducted using a Completely Randomized Design (CRD) with 6 treatments and 3 replications. The treatments consisted of controls, 1 g / l, 2g / l, 3 g / l, 4 g / l, and 5 g / l. Each treatment was applied to instar 4, instar 5 and 6 instar larvae. The results showed that SlNPV JTM 97C affected mortality, stopped eating and pupa formation of instar 4, instar 5 larvae, but did not affect instar 6 larvae. The younger the larval instar the higher the pathogenicity response.

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