Control of Primary Infections of Subterranean Clover Red Leaf Virus, a Luteovirus, in a Broad Bean Crop With the Synthetic Pyrethroid Deltamethrin.

1984 ◽  
Vol 13 (4) ◽  
pp. 55 ◽  
Author(s):  
GR Johnstone
Keyword(s):  
Broad Bean ◽  
Subterranean Clover ◽  
Synthetic Pyrethroid ◽  
Bean Crop ◽  
Leaf Virus

Diseases of broad bean (Vicia faba L. major) and green pea (Pisum sativum L.) in Tasmania caused by subterranean clover red leaf virus

1978 ◽  
Vol 29 (5) ◽  
pp. 1003 ◽  
Author(s):  
GR Johnstone
Keyword(s):  
Broad Bean ◽  
Leaf Roll ◽  
Subterranean Clover ◽  
Aphid Transmission ◽  
Pisum Sativum L ◽  
Bean Plants ◽  
Subterranean Clover Stunt Virus ◽  
Efficient Vector ◽  
Green Pea ◽  
Leaf Virus

A leaf-roll disease of broad bean, similar to that induced by bean leaf roll virus (BLRV) in Europe, is common in Tasmania. Subterranean clover red leaf virus (SCRLV) was transmitted to subterranean clover test seedlings by using its most efficient vector, Aulacorthum solani (Kalt.), from 84% of 204 randomly selected affected broad bean plants. The disease was reproduced in broad bean with SCRLV in controlled aphid transmission tests. Effects of infection on yield were severe, as further pod set was markedly reduced after symptoms of infection developed. There was some variation among cultivars in their response to infection. The virus occurred as commonly in green pea crops as in broad bean. In pea it caused a top yellowing, but most commercially grown pea cultivars had some tolerance. Subterranean clover stunt virus (SCSV) caused symptoms in broad bean and pea which were also similar to those induced by SCRLV. However, SCSV was rarely found infecting plants in Tasmanian pea and bean crops. BLRV, SCRLV and SCSV share many properties in common and with some other viruses.

Control of subterranean clover red leaf virus in broad bean crops with aphicides

1981 ◽  
Vol 99 (2) ◽  
pp. 135-141 ◽  
Author(s):  
G. R. JOHNSTONE ◽  
P. E. L. RAPLEY
Keyword(s):  
Broad Bean ◽  
Subterranean Clover ◽  
Leaf Virus

The effect of time of sowing on the incidence of subterranean clover red leaf virus infection in broad bean (Vicia faba)

1979 ◽  
Vol 91 (3) ◽  
pp. 345-351 ◽  
Author(s):  
G. R. JOHNSTONE ◽  
P. E. L. RAPLEY
Keyword(s):  
Virus Infection ◽  
Vicia Faba ◽  
Broad Bean ◽  
Subterranean Clover ◽  
Leaf Virus

THESIS SUMMARY STUDIES OF ALFALFA MOSAIC VIRUS AND SUBTERRANEAN CLOVER RED LEAF VIRUS

1979 ◽  
pp. 163-164
Author(s):  
P.B. Teh
Keyword(s):  
Mosaic Virus ◽  
Alfalfa Mosaic Virus ◽  
Subterranean Clover ◽  
Test Plant ◽  
Transmission Frequency ◽  
Virus Source ◽  
Leaf Virus

AMV was shown to be transmitted by sap, aphids and through lucerne seed, but not by Cuscuta. Virus source and test plant influenced transmission frequency. Sap-inoculation tests showed that 20 species of plants were susceptible to this virus. Thirteen species of plants from the fields where AMV had been detected were tested but only three were found to be infected with the virus.

Purification of a Tasmanian isolate of subterranean clover red leaf virus, and its serological interactions with a New Zealand isolate and other luteoviruses

1982 ◽  
Vol 33 (4) ◽  
pp. 697 ◽  
Author(s):  
GR Johnstone ◽  
JE Duffus ◽  
D Munro ◽  
JW Ashby
Keyword(s):  
New Zealand ◽  
Gradient Centrifugation ◽  
Subterranean Clover ◽  
Particle Morphology ◽  
Serological Tests ◽  
Virus Particles ◽  
Potato Isolate ◽  
Distinct Member ◽  
The Relationship ◽  
Leaf Virus

A Tasmanian isolate of subterranean clover red leaf virus (SCRLV) was purified and concentrated from pea (Pisum sativunz L. cv. Puget) by tissue extraction with cellulase followed by heat clarification, precipitation with polyethylene glycol in salt, and differential and density gradient centrifugation. Virus particles were isometric and 27 nm in diameter. Aulacorthum solani (Kalt.) acquired virus particles from the preparations through Parafilm membranes and transmitted them to healthy subterreanean clover test seedlings, causing disease symptoms of SCRLV. Isolates of SCRLV from Tasmania appeared identical with those from New Zealand on the basis of particle morphology and serological tests. Tasmanian SCRLV was distantly related serologically to Californian isolates of beet western yellows (BWYV) and legume yellows (LYV) viruses. Tests indicated that the relationship was closest with a potato isolate of BWYV and most distant with LYV. Virus particles in sap extracts from infected pea plants were readily detected by electron microscopy following adsorption onto grids coated with SCRLV antiserum, but not on grids coated with antisera to BWYV and LYV. These data confirm that SCRLV is a new, distinct member of the luteovirus group.

scholarly journals Water Requirements of Crops under Various Kc Coefficient Approaches by Using Water Evaluation and Planning (WEAP)

2020 ◽  
Vol 15 (5) ◽  
pp. 739-748
Author(s):  
Abu Baker A. Najm ◽  
Isam M. Abdulhameed ◽  
Sadeq O. Sulaiman
Keyword(s):  
Broad Bean ◽  
Sandy Loam ◽  
Water Requirement ◽  
Silt Loam ◽  
Clay Loam ◽  
Water Requirements ◽  
Winter Crops ◽  
End Stage ◽  
Bean Crop ◽  
Water Evaluation And Planning

In this study, the Dual-Kc approach within FAO-56 paper was applied by water evaluation and planning (WEAP) to get the Kc parameters (Kcb and Ke) and to calculate the water requirement for various soil textures. The results compared with the outputs of Single-Kc approach for summer and winter crops in addition to trees. The results showed when applying Dual-Kc approach, the water requirements was more compared with the Single-Kc approach, except the tomato, eggplant, and Broad bean crop, which decreased by 5%, 4%, and 17% respectively. Also, there was a different in values of coefficient when compare two approaches, it was increased in Dual-Kc approach for wheat by 62% with 20% during initial and end-stage while ranged between 26-58% for trees during all season with more different for other winter and summer crops. The water requirement of crops was different according to soil texture. The net water requirement of wheat was 429 mm and 433 mm for sandy loam and clay loam respectively, with different in irrigation intervals 11 and 12 respectively, while the silt loam was recording water requirement 417 mm with 8 irrigation intervals.

Purification of particles of subterranean clover red leaf virus using an industrial-grade cellulase

1984 ◽  
Vol 8 (4) ◽  
pp. 321-329 ◽  
Author(s):  
P.M. Waterhouse ◽  
Katie Helms
Keyword(s):  
Subterranean Clover ◽  
Industrial Grade ◽  
Leaf Virus
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