scholarly journals EVALUATION OF ADMIRE FOR THE CONTROL OF CUCUMBER BEETLES AND BACTERIAL WILT IN CUCUMBER, 2000

2001 ◽  
Vol 26 (1) ◽  
Author(s):  
M. T. McGrath ◽  
D. Gilrein
Keyword(s):  
Bacterial Wilt ◽  
Cucumber Beetles

scholarly journals 627 Using a Toxic Bait and a Trap Crop for the Control of Striped and Spotted Cucumber Beetles and Bacterial Wilt of Cucumbers

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 555D-555 ◽  
Author(s):  
Karen M. Meyer ◽  
Greg L. Davis ◽  
James R. Steadman
Keyword(s):  
Bacterial Wilt ◽  
Block Design ◽  
Bacterial Pathogen ◽  
Direct Application ◽  
Plant Metabolites ◽  
Trap Crop ◽  
Erwinia Tracheiphila ◽  
Secondary Plant Metabolites ◽  
Cucumber Beetles ◽  
Trap Plants

The toxic bait, Adios, was tested with the use of a trap crop in a field experiment at the Univ. of Nebraska during Summer 1998. The insecticide contains the secondary plant metabolites known as cucurbitacins that are highly attractive to the striped and spotted cucumber beetles, Acalymma vittatum and Diabrotica undecimuncata howardi, respectively. These beetles serve as the vector of the bacterial pathogen, Erwinia tracheiphila, which causes severe wilting and eventual death of susceptible cucurbits. The objective of the study was to determine whether treatments of Adios, when applied to a flowering trap crop of resistant squash plants, would lure the cucumber beetles away from the susceptible cucumber plants and reduce bacterial wilt. The study compared the effectiveness of a sprayed trap crop, the direct application of Adios to the cucumber plants and no treatment in a randomized complete-block design. A greater number of beetles were attracted to the sprayed and untreated cucumbers compared to the cucumbers surrounded by the treated trap plants. However, significant numbers of dead beetles were found near the sprayed cucumber plants. Untreated plants showed more feeding damage, diminished fruit quality, and an earlier observation date of wilt symptoms as compared to the other treatments. The treated trap plants and the direct application of Adios were effective in delaying infection in cucumbers compared to the untreated plants in the experimental plots. This treatment may be useful to home gardeners.

Erwinia tracheiphila. [Descriptions of Fungi and Bacteria].

1970 ◽  
Author(s):  
J. F. Bradbury
Keyword(s):  
South Africa ◽  
North America ◽  
Geographical Distribution ◽  
Bacterial Wilt ◽  
Seed Transmission ◽  
Mechanical Transmission ◽  
Erwinia Tracheiphila ◽  
Cucumber Beetles

Abstract A description is provided for Erwinia tracheiphila. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Cucumis spp., Cucurbita spp., and Citrullus spp. Elliott lists hosts in three other genera, all Cucurbitaceae. DISEASE: Bacterial wilt of cucumber. The symptoms are similar to those of other wilts, leaves and later entire branches wilt and shrivel. Infected stems may exude sticky bacterial slime when cut, which helps to distinguish this disease from other wilts. GEOGRAPHICAL DISTRIBUTION: Widespread in Canada and U.S.A., also reported sporadically in South Africa, Congo, Japan, China, U.S.S.R., and several countries in Europe (CMI Map 456). TRANSMISSION: The usual vectors in North America are the cucumber beetles, Diabrotica spp., but other insects that cause wounds may also be able to transmit the disease, e.g. grasshoppers (Chupp & Sherf, 1960). It has not been conclusively shown that woodlice play an important role in transmission in the absence of Diabrotica spp., and statements to this effect seem to originate from the conjecture of Bewley in his Diseases of Glasshouse Plants (3: 94). Mechanical transmission on tools or hands of workers also occurs. Infection without wounding does not normally take place, but there is one report of infection along the margins of unwounded leaves that had been artificially water-congested (28: 26). Seed transmission does not occur.

scholarly journals New Pest Control Strategies and Effects on Pollination of Cucumbers

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 700f-701
Author(s):  
Karen E. Mulford ◽  
James J. Linduska
Keyword(s):  
Pest Control ◽  
Bacterial Wilt ◽  
Control Strategies ◽  
Cucumber Beetles ◽  
Plant Emergence ◽  
New Pest ◽  
Methods Of Application

Cucumbers are susceptible to the bacterial wilt organism that overwinters in the gut of cucumber beetles. This disease is transmitted in feces via open feeding wounds and plugs xylem vessels of water conductive tissues. Insecticides can be applied to control cucumber beetles. Adios, a semiochemical bait impregnated with cucurbitacin is combined with the insecticide carbaryl, which can be applied after plant emergence to control cucumber beetles. However, the method of application for giving the maximum control is unknown; thus, this was the purpose of this project. This study evaluates the rate of application, number of applications, methods of application using pressure and airblast sprays, and compares two Adios formulations. Also studied were the effects of Adios on bee fertilization and the quality of the fruit, since carbaryl is toxic to bees, and therefore can affect pollination. Adios was also compared to a foliar insecticide, Asana.

scholarly journals NEW PEST CONTROL STRATEGIES AND EFFECTS ON POLLINATION OF CUCUMBERS

HortScience ◽  
1996 ◽  
Vol 31 (5) ◽  
pp. 744b-744
Author(s):  
Karen E. Mulford ◽  
Dr. James Linduska
Keyword(s):  
Pest Control ◽  
Bacterial Wilt ◽  
Control Strategies ◽  
Cucumber Beetles ◽  
Diabroticite Beetles ◽  
Plant Emergence ◽  
New Pest ◽  
Methods Of Application

Cucumbers are susceptible to the bacterial wilt organism that overwinters in the gut of Diabroticite (cucumber) beetles. This disease is transmitted in feces via open feeding wounds and plugs xylem vessels of water conductive tissues. Insecticides can be applied to control Diabroticite beetles. Adios, a semiochemical bait impregnated with cucurbitacin is combined with the insecticide carbaryl, which can be applied after plant emergence to control Diabroticite beetles. However, the method of application for giving the maximum control was unknown. This study evaluates the rate of application, number of applications, methods of application using pressure and airblast sprays, and compares two Adios formulations. Also studied were the effects of Adios on bee fertilization and the quality of the fruit, since carbaryl is toxic to bees and thus affects pollination. Adios was also compared to a foliar insecticide, Asana XL.

scholarly journals Effect of Row Covers on Suppression of Bacterial Wilt of Muskmelon in Iowa

2006 ◽  
Vol 7 (1) ◽  
pp. 6 ◽  
Author(s):  
Daren S. Mueller ◽  
Mark L. Gleason ◽  
Adam J. Sisson ◽  
Jon M. Massman
Keyword(s):  
Bacterial Wilt ◽  
Row Covers ◽  
Cucumber Beetles ◽  
Wilt Incidence

Spun polyester row covers, alone and in combination with insecticides, were evaluated for management of bacterial wilt of muskmelon at three locations in Iowa during 2003 and 2004. Following removal of row covers at bloom, more spotted cucumber beetles were counted in the plots with row covers than in the non-covered plots. Row covers delayed the onset of bacterial wilt symptoms and reduced bacterial wilt incidence. In both years, row covers increased both number and yield of marketable melons. There were no significant differences in beetle counts or melon yield among insecticide treatments in 2003. In 2004, however, each of the insecticide treatments had more marketable melons than the non-treated control. Row covers may enable cucurbit growers to reduce reliance on insecticides for managing bacterial wilt. Accepted for publication 31 July 2006. Published 20 October 2006.

scholarly journals Differential Occurrence of Bacterial Wilt in Muskmelon Due to Preferential Striped Cucumber Beetle Feeding

HortScience ◽  
1995 ◽  
Vol 30 (5) ◽  
pp. 1043-1045 ◽  
Author(s):  
Gerald E. Brust ◽  
Karen K. Rane
Keyword(s):  
Bacterial Wilt ◽  
Cucumis Melo ◽  
Field Studies ◽  
Causal Agent ◽  
The Other ◽  
Feeding Damage ◽  
Selective Feeding ◽  
Cucumber Beetles ◽  
Cucumber Beetle ◽  
Striped Cucumber Beetle

Ten muskmelon (Cucumis melo L.) cultivars were tested for their susceptibility to bacterial wilt, caused by Erwinia trucheiphila (Smith) Bergey, Harrison, Breed, Hammer and Huntoon and vectored by the striped cucumber beetle Acalymma vittatum (F). `Superstar', `Rising Star', `Pulsar', `Caravelle', `Cordele', `Legend', `Makdimon', `Galia', `Rocky Sweet', and `Passport' were used in field studies to determine the number of striped cucumber beetles, feeding damage, and incidence of bacterial wilt. `Makdimon' and `Rocky Sweet' hosted significantly more beetles than the other cultivars. These two cultivars and `Legend' and `Cordele' had much more feeding damage and a significantly higher incidence of bacterial wilt than the others. A greenhouse experiment was conducted with seven of the cultivars to test their susceptibility to bacterial wilt when directly inoculated with the causal agent. All cultivars were equally susceptible to the disease when it was introduced directly into the plant. Selective feeding by striped cucumber beetles was probably most responsible for `Makdimon', `Rocky Sweet', `Legend', and `Cordele' having greater incidences of bacterial wilt than the other cultivars.

Segregation of Resistance to Bacterial Wilt in Crosses Involving Grimm Alfalfa 1

1947 ◽  
Vol 39 (5) ◽  
pp. 423-425 ◽  
Author(s):  
Fred Reuel Jones ◽  
William K. Smith
Keyword(s):  
Bacterial Wilt

scholarly journals Different Sequevars of Ralstonia pseudosolanacearum Causing Bacterial Wilt of Bidens pilosa in China

Plant Disease ◽  
2020 ◽  
Vol 104 (11) ◽  
pp. 2768-2773
Author(s):  
Yonglin He ◽  
Yixue Mo ◽  
Dehong Zheng ◽  
Qiqin Li ◽  
Wei Lin ◽  
...  
Keyword(s):  
Arachis Hypogaea ◽  
Bacterial Wilt ◽  
Geographical Origin ◽  
Bidens Pilosa ◽  
Invasive Weed ◽  
High Virulence ◽  
Race 1 ◽  
Ralstonia Pseudosolanacearum ◽  
Phylotype I

Bidens pilosa is an invasive weed that threatens the growth of crops and biodiversity in China. In 2017, suspected bacterial wilt of B. pilosa was discovered in Qinzhou and Beihai, Guangxi, China. A variety of weeds are considered as reservoirs harboring bacterial wilt pathogens, but most do not show obvious symptoms in the field. Identifying the classification status of the B. pilosa bacterial wilt pathogen and exploring its geographical origin might be helpful for clarifying the role of weeds in the circulation of the disease. Phylotyping, sequevar analysis, and cross inoculation of pathogens isolated from B. pilosa and nearby peanut (Arachis hypogaea), balsam gourd (Momordica charantia), and eucalyptus (Eucalyptus robusta) plants were carried out. Three isolates of B. pilosa (Bp01, Bp02, and Bp03) were identified as Ralstonia pseudosolanacearum, race 1, biovar 3, and phylotype I, and belonged to sequevars 17 and 44, and an unknown sequevar. The sequevars isolated from B. pilosa were not completely consistent with those of the nearby hosts, and the virulence of these isolates differed when cross inoculated. The Bp03 sequevar was different from peanut isolate sequevars in the same field and was not identical to any previously designated sequevars. The isolates from B. pilosa and other nearby hosts displayed low or no virulence toward their cross hosts (with wilt incidences less than 33.33%). An exception to this was the isolates from B. pilosa, which displayed high virulence toward eucalyptus (with a wilt incidence of 70.00 to 100.00%). This is the first report of different sequevars of R. pseudosolanacearum causing typical bacterial wilt symptoms in B. pilosa in the field.

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