scholarly journals RESISTENSI BEBERAPA AKSESI WIJEN TERHADAP SERANGAN HAMA TUNGAU (Polyphagotarsonemus latus Banks)

2020 ◽  
Vol 15 (4) ◽  
pp. 184
Author(s):  
S. W . TUKIMIN ◽  
R. D. PURWATI ◽  
WIDI RUMINI
Keyword(s):  
Key Words ◽  
Sesamum Indicum ◽  
Polyphagotarsonemus Latus ◽  
Source Gene ◽  
Broad Mite

<p>ABSTRAK</p><p>Serangan hama tungau Polyphagotarsonemus latus (Banks) padatanaman wijen (Sesamum indicum L.) mulai terjadi pada tahun 2005 yangmengakibatkan penurunan produksi di daerah-daerah pengembangan.Langkah awal untuk mendapatkan varietas tahan P. latus adalahmengetahui sumber ketahanan pada plasma nutfah wijen. Pengujianresistensi beberapa aksesi wijen terhadap hama tungau P. latus dilaksana-kan di Kebun Percobaan Sumberrejo, Bojonegoro, mulai April sampai Juli2008. Tujuan penelitian untuk mengetahui tingkat ketahanan aksesi-aksesiwijen terhadap tungau Polyphagotarsonemus latus (Banks). Perlakuanyang terdiri dari 25 aksesi wijen disusun dalam rancangan acak kelompok,dan diulang tiga kali. Pengamatan meliputi: intensitas kerusakan daun,serta jumlah telur, larva, nimfa dan imago P. latus dan dilakukan mulai 25HST hingga 75 HST dengan interval 10 hari sekali. Hasil penelitianmenunjukkan bahwa intensitas serangan hingga 75 HST terendah padaaksesi HD 11 (50,0%). Nilai tersebut termasuk dalam kategori agak tahanterhadap kerusakan tungau P. latus. Intensitas kerusakan tertinggi padaaksesi HD 3 (63,33%), HD 8 dan HD 15 masing-masing 61,67%, dantermasuk kategori rentan terhadap serangan tungau P. latus. Populasilarva, nimfa, dan imago P. latus berpengaruh terhadap tingginya nilaiintensitas kerusakan.</p><p>Kata kunci : Sesamum indicum, resistensi, aksesi, Polyphagotarsonemuslatus (Banks)</p><p>ABSTRACT</p><p>The Resistance of Sesame (Sesamum indicum L.)Accessions Against Broad Mite Polyphagotarsonemuslatus (Banks)</p><p>Since 2005, investation of mite Polyphagotarsonemus latus (Banks)has affected the decrease of sesame (Sesamum indicum L.) productivity inits cultivation area. The initial first improvement to gain resistant varietiesto P. latus was identifying resistant source/gene of sesame germplasm. Theresistance evaluation of sesame accession against mite was conducted inexperimental station of IToFCRI, Sumberrejo, Bojonegoro from Apriluntil July 2008. This experiment was aimed at finding out resistanceaccessions against leaf mite P. latus. The treatment consisted of 25accessions and was arranged in randomized blok design with threereplications. The parameter observed were: leaves damage intensity, eggs,larvae, nymph and adult of P. latus. The observation had been performedsince 25 days after planting (DAP) with ten days interval until 75 DAP.The result showed that the lowest damage intensity at 75 DAP, wasobserved on HD 11 (50,0%). as moderately resistance. Other accessionswith high damage intensity were HD 3 (63,33%), HD 8 and HD 15(61,67%) and were categorized as sensitive to mite P. latus. Population oflarvae, nymph, and adult of P. latus influenced the damage intensity.</p><p>Key words: Sesamum indicum, resistance, accessions, Polyphagotar-sonemus latus (Banks)</p>

Role of jasmonic acid signaling in tomato defense against broad mite, Polyphagotarsonemus latus (Acari: Tarsonemidae)

2015 ◽  
Vol 9 (4) ◽  
pp. 361-372 ◽  
Author(s):  
Mor Grinberg-Yaari ◽  
Jeyasankar Alagarmalai ◽  
Efraim Lewinsohn ◽  
Rafael Perl-Treves ◽  
Victoria Soroker
Keyword(s):  
Jasmonic Acid ◽  
Polyphagotarsonemus Latus ◽  
Jasmonic Acid Signaling ◽  
Broad Mite

The broad mite,Polyphagotarsonemus latus, as a potential prey for phytoseiid mites in California

Entomophaga ◽  
1984 ◽  
Vol 29 (1) ◽  
pp. 83-86 ◽  
Author(s):  
J. A. McMurtry ◽  
M. H. Badii ◽  
H. G. Johnson
Keyword(s):  
Potential Prey ◽  
Polyphagotarsonemus Latus ◽  
Phytoseiid Mites ◽  
Broad Mite

scholarly journals Studies on High Frequency Shoot Regeneration in Sesame (Sesamum indicum L.)

2012 ◽  
Vol 21 (1) ◽  
pp. 45-52 ◽  
Author(s):  
Bangaramma S. Wadeyar ◽  
R. Lokesha
Keyword(s):  
Key Words ◽  
Shoot Regeneration ◽  
Plant Tissue ◽  
High Frequency ◽  
Sesamum Indicum ◽  
Direct Seeding ◽  
The Other ◽  
Seeding Method ◽  
Regeneration Response ◽  
High Sucrose

High frequency shoot regeneration was attempted in sesame (Sesamum indicum L. Pedaliaceae), using five genotypes/varieties viz. Tumkur and Gulbarga Locals (land races), W-II, E-8 and DS-1 (varieties). The hypocotyl-derived callus obtained through direct seeding method was placed on MS with five different treatments viz. pre-culture of callus on high sucrose (6 - 9%) for two weeks and transferring on to plain MS with 3% sucrose, MS with variable concentrations of TDZ alone, MS with constant TDZ and variable concentrations of BA and IAA, MS with variable concentrations of BA and IAA without TDZ, MS with ABA and AgNO3 and MS with BAP, NAA and AgNO3.  Highest frequency of cent per cent shoot regeneration was initiated in variety DS-1on MS containing NAA 2.5 mg/l, BAP 3.5 mg/l and 20 µM AgNO3 with 2.50 mean shoots/callus followed by 91.6% in variety W-II on MS containing 25 µM TDZ with 2.20 mean shoots/callus. The other treatments had poor shoot regeneration response. The results have been discussed in the light of sesame improvement through biotechnological ways.   Key words: Sesamum indicum, hypocotyl, high frequency,  shoot regeneration   D. O. I. 10.3329/ptcb.v21i1.9562   Plant Tissue Cult. & Biotech. 21(1): 45-52, 2011 (June)

Host preference, population growth and injuries assessment of Polyphagotarsonemus latus (banks) (ACARI: Tarsonemidae) on Capsicum annuum L. Genotypes

2016 ◽  
Vol 106 (5) ◽  
pp. 672-678 ◽  
Author(s):  
M.O. Breda ◽  
J.V. de Oliveira ◽  
A.B. Esteves Filho ◽  
D.R.S. Barbosa ◽  
M.F. de Santana
Keyword(s):  
Population Growth ◽  
Capsicum Annuum ◽  
Population Growth Rate ◽  
Host Preference ◽  
Polyphagotarsonemus Latus ◽  
Population Growth Rates ◽  
Choice Tests ◽  
Broad Mite ◽  
Positive Population ◽  
Total Average

AbstractDespite the continued efforts on the search for different genotypes, Capsicum annuum (L.) is quite susceptible to attack by pest arthropods, especially the broad mite Polyphagotarsonemus latus Banks. Thus, the host preference, population growth and the injuries assessment of P. latus was studied on six C. annuum genotypes used in Brazil (Atlantis, California Wonder, Impact, Palloma, Rubia and Tendence). Host preference was accessed in choice tests, pairing the several genotypes, and the population growth was observed through non-choice tests in laboratory. The injuries assessments were evaluated in the greenhouse, comparing the injury level among the six genotypes. The results indicate that California Wonder and Palloma genotypes were more preferred by P. latus, and Impact and Tendence were less preferred. P. latus presented positive population growth rates (ri) on all the genotypes, however, Palloma and California Wonder showed the highest values of population growth rate (ri = 0.344 and ri = 0.340, respectively), while Impact had the lowest value (ri = 0.281). All the evaluated C. annuum genotypes showed low tolerance to P. latus and exhibited several injuries, but there was no statistical difference between them. California Wonder had the highest average number of mites/leaf (57.15), while Impact and Tendence obtained the lowest values (36.67 and 35.12, respectively) at the end of the evaluation period. The total average of injuries notes at the end of the bioassay did not differ between the genotypes. The number of mites/leaf was growing for the injury scale to the note 3.0, but when the injury scale approached the note 4.0, there was observed a decrease in the number of mites/leaf for all the genotypes.

scholarly journals Broad Mite on Primocane-fruiting Blackberry in Organic Production in Arkansas

2010 ◽  
Vol 20 (4) ◽  
pp. 718-723 ◽  
Author(s):  
Christopher I. Vincent ◽  
M. Elena García ◽  
Donn T. Johnson ◽  
Curt R. Rom
Keyword(s):  
Leaf Area ◽  
Organic Production ◽  
Temperate Climate ◽  
Trichome Density ◽  
Ambient Conditions ◽  
Polyphagotarsonemus Latus ◽  
High Tunnels ◽  
Broad Mite ◽  
Spring Harvest ◽  
Genotype Effects

The broad mite (Polyphagotarsonemus latus) was found in association with leaf-curling symptoms on primocane-fruiting blackberry (Rubus rubus) in Arkansas in 2007–2009. Broad mite had not been previously reported on blackberry. The plots sampled in this study were part of a study comparing harvesting in the fall versus harvest in spring and fall, high tunnels versus ambient conditions, and three genotypes, all under organic production. Leaves were sampled, broad mites per leaf counted, and leaf area and trichome density measured. Results indicated that broad mite is capable of overwintering in a moderate temperate climate and that it reduces leaf area of primocane-fruiting blackberry. The fall-only harvest system had fewer broad mites than fall and spring harvest. There were a range of genotype effects on broad mite populations, including one genotype, ‘Prime-Jan®’, on which broad mite populations remained low, and one genotype, APF-46, on which mite populations grew significantly. Observations indicate that the broad mite may be a pest of ‘Prime-Ark® 45’, another primocane-fruiting cultivar.

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