Viruses infecting peaches in the Murrumbidgee Irrigation Areas of New South Wales

1972 ◽  
Vol 12 (57) ◽  
pp. 447
Author(s):  
RD Pares ◽  
LJ Penrose ◽  
PF Kable
Keyword(s):  
New South ◽  
New South Wales ◽  
Dwarf Virus ◽  
Prune Dwarf Virus ◽  
South Wales ◽  
Decline Disease ◽  
Dark Green

Prunus necrotic ringspot and dark green sunken mottle viruses were present in canning peaches in the Murrumbidgee Irrigation Areas of New South Wales. Prune dwarf virus was not detected. The peach rosetting and decline disease was not observed.

scholarly journals Occurrence of Winter Cereal Viruses in New South Wales, Australia, 2006 to 2014

Plant Disease ◽  
2016 ◽  
Vol 100 (2) ◽  
pp. 313-317 ◽  
Author(s):  
Andrew Milgate ◽  
Dante Adorada ◽  
Grant Chambers ◽  
Mary Ann Terras
Keyword(s):  
Mosaic Virus ◽  
Barley Yellow Dwarf Virus ◽  
New South ◽  
New South Wales ◽  
Yellow Dwarf ◽  
Dwarf Virus ◽  
Winter Cereal ◽  
Barley Yellow Dwarf ◽  
South Wales ◽  
Yellow Dwarf Virus

Winter cereal viruses can cause significant crop losses; however, detailed knowledge of their occurrence in New South Wales, Australia is very limited. This paper reports on the occurrence of Wheat streak mosaic virus (WSMV), Wheat mosaic virus (WMoV), Barley yellow dwarf virus (BYDV), Cereal yellow dwarf virus (CYDV), and their serotypes between 2006 and 2014. Detection of WMoV is confirmed in eastern Australia for the first time. The BYDV and CYDV 2014 epidemic is examined in detail using 139 samples of wheat, barley, and oat surveyed from southern New South Wales. The presence of virus was determined using enzyme-linked immunosorbent assays. The results reveal a high frequency of the serotype Barley yellow dwarf virus - MAV as a single infection present in 27% of samples relative to Barley yellow dwarf virus - PAV in 19% and CYDV in 14%. Clear differences emerged in the infection of different winter cereal species by serotypes of BYDV and CYDV. These results are contrasted to other Australian and international studies.

The association of Prunus ringspot, prune dwarf, and dark green sunken mottle viruses in the rosetting and decline disease of peach

1971 ◽  
Vol 22 (5) ◽  
pp. 771 ◽  
Author(s):  
LL Stubs ◽  
PR Smith
Keyword(s):  
Root Zone ◽  
Seed Transmission ◽  
Ringspot Virus ◽  
Dwarf Virus ◽  
Prune Dwarf Virus ◽  
Natural Spread ◽  
Decline Disease ◽  
Prunus Necrotic Ringspot Virus ◽  
Dark Green

The symptoms of a rosetting and decline disease of peach are described. Prunus necrotic ringspot virus (PRSV), prune dwarf virus (PDV), and a virus which causes a dark green sunken mottle (DGSM) on peach leaves have been isolated from diseased trees. Combinations of these viruses interacted synergistically in peach seedlings, but with considerable variation in the degree of synergism. The most severe expression of rosetting resulted from the interaction of all three viruses. Interaction between PRSV and PDV usually caused recurrent rosetting. PRSV and PDV were transmitted through the seed of rosetted peaches, but the latter in only a low percentage of seeds (max. 6%) and then only in combination with PRSV, which was transmitted to a maximum of 35.7 %. There was no evidence for seed transmission of DGSM. A study of natural spread of rosetting in a commercial planting of Golden Queen peaches showed that rosetted trees increased from 0.8 to 56.1 %, a total of 265 in 472 trees, in 7 years. Seedlings grown in soil obtained from the root zone of infected trees did not become infected.

Effect of barley yellow dwarf virus on the yield of wheat in NSW

1970 ◽  
Vol 10 (45) ◽  
pp. 502
Author(s):  
AM Smith
Keyword(s):  
Barley Yellow Dwarf Virus ◽  
New South ◽  
Rhopalosiphum Padi ◽  
New South Wales ◽  
Yellow Dwarf ◽  
Dwarf Virus ◽  
Organophosphate Insecticide ◽  
Barley Yellow Dwarf ◽  
South Wales ◽  
Yellow Dwarf Virus

The effect of barley yellow dwarf virus (BYDV) on yields of wheat in New South Wales was assessed in field trials at two sites over three seasons. Regular applications of an organophosphate insecticide, demeton-S-methyl, were used to control the insect vectors of the disease. Results indicated that in most seasons BYDV is only a minor disease of wheat in New South Wales. Rhopalosiphum padi appeared to be the most important aphid vector of the disease.

Impact of cereal aphids on wheat yields in southern New South Wales, Australia

1999 ◽  
Vol 39 (2) ◽  
pp. 171 ◽  
Author(s):  
W. M. Milne ◽  
R. I. Delves
Keyword(s):  
Barley Yellow Dwarf Virus ◽  
New South ◽  
New South Wales ◽  
Yellow Dwarf ◽  
Dwarf Virus ◽  
Striking Difference ◽  
Cereal Aphids ◽  
Barley Yellow Dwarf ◽  
South Wales ◽  
Yellow Dwarf Virus

The effect of naturally occurring aphid infestations on yield was studied using sprayed and unsprayed plots in commercial wheat crops at a number of sites in southern New South Wales, Australia. In 1990, wheat was planted in April or early May following early autumn rains. Aphids were first found in the crops 4 weeks after the wheat was sown. Numbers were generally low and only at 1 site was there a significant effect on yield. In 1991, sowing was delayed by prolonged dry weather during autumn. Most crops were planted in late May and aphids started to appear only in mid July. There was no significant effect of aphids on yield but most crops were badly affected by drought. In 1991, labelled plants at some sites were used to study the impact of varying levels of aphid infestation on yield. There was a significant negative correlation between the number of aphids and yield per plant at 1 site. In both years, aphid numbers peaked in August or September. Rhopalosiphum padi was virtually the only aphid species found. Leaf samples were collected from 3 sites in 1990 and from all sites in 1991 and tested for barley yellow dwarf virus. The incidence of this virus was very high in 1990 but negligible in 1991. The striking difference in the incidence of barley yellow dwarf virus in the 2 years was most likely the result of later sowing times and delayed arrival of aphids in crops in 1991. Aphids may have a considerable impact on yield in early-sown wheat through transmission of barley yellow dwarf virus.

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