Insecticidal seed treatment — a physiological assessmentresoybean yield - bean leaf beetle - Bean pod mottle virus

2016 ◽  
Author(s):  
James E. Specht
Keyword(s):  
Seed Treatment ◽  
Leaf Beetle ◽  
Mottle Virus ◽  
Bean Pod Mottle Virus ◽  
Bean Leaf Beetle

scholarly journals Quantifying the Within-Field Temporal and Spatial Dynamics of Bean pod mottle virus in Soybean

Plant Disease ◽  
2011 ◽  
Vol 95 (2) ◽  
pp. 126-136 ◽  
Author(s):  
E. Byamukama ◽  
A. E. Robertson ◽  
F. W. Nutter
Keyword(s):  
Point Source ◽  
Spatial Dynamics ◽  
Leaf Beetle ◽  
Mottle Virus ◽  
Growth Stages ◽  
Spatial Analyses ◽  
Bean Pod Mottle Virus ◽  
Beetle Population ◽  
Bean Leaf Beetle ◽  
Temporal And Spatial

The prevalence and incidence of Bean pod mottle virus (BPMV) have been reported to be on the increase in the United States but little is known about the temporal and spatial dynamics of this virus within soybean (Glycine max) fields. A quadrat-based sampling method was developed to quantify the within-field spread of BPMV in soybean in 2006 and 2007. Twenty-five 30-cm-long quadrats were established within each row of soybean in field plots consisting of six rows, each 7.6 m long and spaced 0.76 m apart. Four treatments were used to influence the temporal and spatial dynamics of BPMV epidemics. Treatments were: (i) establishment of a point source of BPMV inoculum within soybean plots; (ii) lambda-cyhalothrin insecticide applied at the V1 and R2 growth stages; (iii) establishment of a BPMV inoculum point source, plus the application of foliar insecticide sprays at the V1 and R2 growth stages; and (iv) a nontreated, noninoculated control. All quadrats (census) were sampled beginning 25 days after planting; sampling continued every 8 to 11 days until plants were senescent. Sap from leaf samples was extracted and tested for BPMV by enzyme-linked immunosorbent assay. The incidence of BPMV per treatment was plotted against time to produce BPMV incidence curves for temporal analyses. In addition, positions of BPMV-positive quadrats were mapped for spatial analyses. BPMV was detected within soybean plots on the first sampling date in 2006 (30 May) and on the second sampling date in 2007 (21 June). The rate of BPMV temporal spread within treatments ranged from 0.11 to 0.13 logits/day in 2006 and from 0.05 to 0.07 logits/day in 2007. Doubling times for BPMV incidence among treatments ranged from 5.4 to 6.4 days in 2006 and from 10.0 to 14.1 days in 2007. Soybean plots that had the earliest dates of BPMV detection within quadrats (x) also had the highest BPMV incidence (y) at the end of the growing season (R2 = 66.5 and 70.4% for 2006 and 2007, respectively). Spatial analyses using ordinary runs, black-white join-counts, and spatial autocorrelation revealed highly aggregated spatial patterns of BPMV-infected quadrats over time. Bean leaf beetle population densities were linearly related to BPMV incidence (P < 0.0001) in both years, indicating that BPMV epidemics were greatly influenced by bean leaf beetle population density. To our knowledge, this is the first study to quantify the seasonal temporal and spatial dynamics of BPMV spread within soybean.

POLYMORPHIC FORMS OF THE BEAN LEAF BEETLE, CEROTOMA TRIFURCATA (FORSTER) (COLEOPTERA: CHRYSOMELIDAE), IN SOYBEANS IN MISSISSIPPI: TRANSMISSION OF BEAN POD MOTTLE VIRUS.1

1989 ◽  
Vol 24 (4) ◽  
pp. 582-587 ◽  
Author(s):  
Henry N. Pitre
Keyword(s):  
Growing Season ◽  
Leaf Beetle ◽  
Transmission Efficiency ◽  
Field Population ◽  
Mottle Virus ◽  
Cerotoma Trifurcata ◽  
Bean Pod Mottle Virus ◽  
Bean Leaf Beetle ◽  
Polymorphic Forms ◽  
Soybean Plants

A field population of bean leaf beetle, Cerotoma trifurcata (Forster), adults on soybean, cv. Lee, in north Mississippi showed consistent frequencies of occurrence of polymorphic forms during the growing season. The greatest percentage of beetles were in the beige with spots category (62%), followed in order by beige without spots (27%), crimson with spots (8%), and crimson without spots (3%). Field-collected adults experimentally transmitted bean pod mottle virus from infected soybean plants, cv. Bragg, to healthy seedlings (1st trifoliolate) after a 24-h acquisition feeding on virus infected source plants with equal degrees of polymorph transmission efficiency (29 - 35%, n.s.).

scholarly journals Bean Leaf Beetle (Coleoptera: Chrysomelidae) and Bean Pod Mottle Virus in Soybean: Biology, ecology, and management

2012 ◽  
Vol 3 (1) ◽  
pp. B1-B7 ◽  
Author(s):  
Buyung A. R. Hadi ◽  
Jeffrey D. Bradshaw ◽  
Marlin E. Rice ◽  
John H. Hill
Keyword(s):  
Leaf Beetle ◽  
Mottle Virus ◽  
Bean Pod Mottle Virus ◽  
Bean Leaf Beetle

Bean Leaf Beetle (Coleoptera: Chrysomelidae) Management for Reduction of Bean Pod Mottle Virus

2004 ◽  
Vol 97 (2) ◽  
pp. 192-202 ◽  
Author(s):  
Rayda K. Krell ◽  
Larry P. Pedigo ◽  
John H. Hill ◽  
Marlin E. Rice
Keyword(s):  
Leaf Beetle ◽  
Mottle Virus ◽  
Bean Pod Mottle Virus ◽  
Bean Leaf Beetle

scholarly journals First Report of Bean pod mottle virus in Soybean in Iran

Plant Disease ◽  
2005 ◽  
Vol 89 (7) ◽  
pp. 775-775 ◽  
Author(s):  
N. Shahraeen ◽  
T. Ghotbi ◽  
M. Salati ◽  
A. Sahandi
Keyword(s):  
Visual Assessment ◽  
Leaf Beetle ◽  
Mottle Virus ◽  
Enzyme Linked Immunosorbent Assay ◽  
Minor Importance ◽  
Bean Pod Mottle Virus ◽  
Trifoliate Leaf ◽  
First Report ◽  
Das Elisa ◽  
Green Stem

Soybean (Glycine max (L.) Merr.) has been increasing in importance and acreage for the past 5 years in Iran and is now planted on approximately 108,000 ha. Previous surveys in Iran of viruses infecting soybean failed to identify Bean pod mottle virus (BPMV), but the incidence of other common viruses of soybean in the field has been reported (1). During October 2004, symptoms characteristic of those caused by BPMV including mosaic, puckering of trifoliate leaves, and delayed maturity of stems or green stems were observed in soybean fields in the Takhti Mahaleh, Versen, and Hashemabad areas located in the Gorgan Province. Sporadic incidence of plants infected with BPMV has been usually of minor importance to growers. Symptoms were often overlooked or considered to be physiological disorders. A visual assessment was made to determine incidence of green stem in the commonly grown soybean cv. Sahar. Forty soybean plants showing symptoms of crinkling, mottling, green stem, and retaining green leaves were sampled by collecting one trifoliate leaf near the top of the plant. All samples were tested in parallel for BPMV using double-antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA). BPMV was detected in 40% of the samples. Seven of the samples shown to be infected with BPMV using DAS-ELISA were mechanically (2) transferred to soybean seedlings in the greenhouse. These plants developed systemic mottle symptoms typical of those caused by BPMV and tested positive for BPMV using DAS-ELISA. The distribution of BPMV within soybean-growing regions, exploration of potential virus reservoirs, and economic impact of this virus have yet to be determined. There is no published report on the presence of potential BPMV vectors including the bean leaf beetle (Cerotoma trifurcata) from soybean fields in Iran. To our knowledge, this is the first report of BPMV in Iran. References: (1) A. R. Golnaraghi et al. Plant Dis.88:1069, 2004. (2) R. Louie et al. Plant Dis.84:1133, 2000.

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