scholarly journals Beauveria bassiana as a potential biocontrol agent against the clover root weevil, Sitona lepidus.

1998 ◽  
Vol 51 ◽  
pp. 9-15 ◽  
Author(s):  
B.E. Willoughby ◽  
T.R. Glare ◽  
F.J. Kettlewell ◽  
T.L. Nelson
Keyword(s):  
Beauveria Bassiana ◽  
Biocontrol Agent ◽  
Sitona Lepidus ◽  
Potential Biocontrol Agent ◽  
Clover Root

scholarly journals South Island distributions of clover root weevil and its biocontrol agent

2010 ◽  
pp. 227-232 ◽  
Author(s):  
C.B. Phillips ◽  
M.R. Mcneill ◽  
S. Hardwick ◽  
C.M. Ferguson ◽  
J.M. Kean
Keyword(s):  
Northern Hemisphere ◽  
White Clover ◽  
Biocontrol Agent ◽  
The North ◽  
Sitona Lepidus ◽  
Clover Root

Clover root weevil (Sitona lepidus) (CRw), a white clover pest from the Northern Hemisphere, was first found in the North island in 1996.

scholarly journals Farmer response to minirelease strategy for the clover root weevil biocontrol agent

2010 ◽  
Vol 63 ◽  
pp. 283-283
Author(s):  
P.J. Gerard ◽  
D.J. Wilson ◽  
T.M. Eden
Keyword(s):  
New Zealand ◽  
Technology Transfer ◽  
Biocontrol Agent ◽  
Good Condition ◽  
High Demand ◽  
Dairy Farmers ◽  
Sitona Lepidus ◽  
Parasitism Rates ◽  
Clover Root ◽  
Microctonus Aethiopoides

The Irish wasp Microctonus aethiopoides was released in 2006 as a biocontrol agent for the clover root weevil Sitona lepidus a serious pest of white clover in New Zealand Following the successful and very rapid establishment of the Irish wasp there was high demand by farmers for the biocontrol Around 2000 minirelease samples were distributed directly to farmers through pastoral industry networks and field days These consisted of ten fieldcollected weevils exposed to the wasp in the laboratory at parasitism rates such that over 99 of samples contained parasitoids A random subsample of 100 recipient dairy farmers was surveyed subsequently by post with 59 responses The minireleases were well received most going to farmers that had previously experienced losses due to the weevil The mini releases were very effective in terms of getting the biocontrol to farms with 92 of insects arriving in good condition and 96 being released on the same day The farmers appeared receptive of the information provided with the samples indicating the project was successful in terms of technology transfer There was good recognition of DairyNZ with 79 showing awareness of the organisations funding enabling the biocontrol research

scholarly journals Influence of Two Varieties of Broad Bean and Beauveria bassiana (Blas) on Aphis fabae scop. Under Field Conditions

2019 ◽  
Vol 9 (2) ◽  
pp. 16-19
Author(s):  
Zayoor Z. Omar ◽  
Tavga S. Rashid ◽  
Hayman K. Awla
Keyword(s):  
Beauveria Bassiana ◽  
Biocontrol Agent ◽  
Broad Bean ◽  
Field Conditions ◽  
Aphis Fabae ◽  
High Concentration ◽  
Black Bean ◽  
Local Variety ◽  
Potential Biocontrol Agent ◽  
Black Bean Aphid

Black bean aphid (Aphis fabae scop.), belongs to order Hemiptera and family Aphididae, is one of the important pests of the Fabaceae family. Beauveria bassiana is an important biocontrol agent to replace chemical insecticides. Therefore, in this research, two different varieties of broad bean with three different concentrations of B. bassiana were investigated on adults of fabae aphids under field conditions. After 3, 5, 7, and 14 days, the effect of the B. bassiana on the population of aphids was measured. The local variety was found to be more sensitive to the aphids compare with the Spain variety. In the high concentration (108 spores/ml), 80% mortality was obtained with B. bassiana in day 3 with local variety; then mortality increased after 5, 7, and 14 days of measuring the population of the adults. Mortality declined with the decrease in concentrations. The Spain variety was found to be resistance because fewer aphids were recorded compared to the local variety. In the highest concentration and day 14, mortality was 100%. The achieved results showed that B. bassiana can be used as a potential biocontrol agent for the management of black bean aphid in the fields.

scholarly journals Status of clover root weevil and its biocontrol agent in the South Island after six years.

2012 ◽  
pp. 171-175 ◽  
Author(s):  
C.M. Ferguson ◽  
M.R. Mcneill ◽  
C.B. Phillips ◽  
S. Hardwick ◽  
D.M. Barton ◽  
...  
Keyword(s):  
Biocontrol Agent ◽  
Parasitoid Wasp ◽  
The South ◽  
Natural Spread ◽  
Sitona Lepidus ◽  
Clover Root ◽  
Microctonus Aethiopoides ◽  
Made In

Clover root weevil was first discovered in the South Island in 2006. Since then its distribution has been monitored. Although not yet occurring throughout all the South Island, it is widespread and has become common in many regions. The first releases of a biocontrol agent, the Irish ecotype of the parasitoid wasp Microctonus aethiopoides, were also made in 2006, with more made as suitable weevil populations were detected. In all areas where the releases have been monitored the biocontrol agent has established and extensive natural spread has occurred from the earlier release sites. As a consequence it is now established extensively in the northern South Island. Targeted releases have established the agent in Canterbury, Otago and Southland. Keywords: Biocontrol, clover root weevil, Sitona lepidus, Microctonus aethiopoides

scholarly journals Greenhouse evaluation of Beauveria bassiana (Balsamo) Vuillemin against Aphis craccivora (Das) on Fenugreek

2014 ◽  
Vol 6 (2) ◽  
pp. 852-856 ◽  
Author(s):  
K. Selvaraj ◽  
H. D. Kaushik
Keyword(s):  
Beauveria Bassiana ◽  
Sustainable Management ◽  
Biocontrol Agent ◽  
Pathogenic Fungus ◽  
Aphis Craccivora ◽  
Lc50 Value ◽  
Greenhouse Evaluation ◽  
Potential Biocontrol Agent ◽  
Field Efficacy ◽  
Lethal Time

The bioassay studies were carried out to determine the LC50 and LT50 of Beauveria bassiana against Aphis craccivora on fenugreek under greenhouse conditions. The results revealed that, the cumulative corrected mortality (CCM) was 43.50% at higher concentration (1×1010 spores/ml) and it was 20.85% at lowest concentration (1×104 spores/ml) at one day after treatment (DAT). The CCM decreased with decreasing conidial spore concentration. Likewise, at 2, 3, 4, 5, 6 and 7 DAT, almost same trend was observed. At 7 DAT, the CCM was 85.04% and 55.21% at 1×1010 spores/ml and 1×104 spores/ml, respectively. The LC50 value of B. bassiana against A. craccivora was 1.2×108 spores/ml. Mean lethal time (LT50) values were worked out 73, 89, 97, 112, 126, 138 and 157 hours for 1010, 109, 108, 107, 106, 105 and 104 spores/ml, respectively. By testing the field efficacy of B. bassiana against A. craccivora, this insect pathogenic fungus can be used as potential biocontrol agent for the sustainable management of aphid in fenugreek crop.

scholarly journals Distribution of the clover root weevil biocontrol agent in the North Island of New Zealand

2008 ◽  
Vol 61 ◽  
pp. 24-30 ◽  
Author(s):  
P.J. Gerard ◽  
T.M. Eden ◽  
D.J. Wilson ◽  
G. Burch
Keyword(s):  
New Zealand ◽  
Biocontrol Agent ◽  
Point Sources ◽  
The North ◽  
Sitona Lepidus ◽  
Clover Root ◽  
Successful Establishment ◽  
Set Up ◽  
Microctonus Aethiopoides ◽  
Training And Support

The Irish wasp Microctonus aethiopoides was released in 2006 as a biocontrol agent for the clover root weevil Sitona lepidus a serious pest of white clover in New Zealand Following successful establishment two strategies were implemented to accelerate the widespread establishment of the parasitoid throughout the North Island The first approach was the establishment of regional nursery sites that act as point sources for natural and assisted dispersal With the assistance of Regional Councils and major landowners these were set up at sites favourable to the wasp and local people were provided the training and support to undertake collections and distribution of parasitized weevils Secondly samples of parasitized weevils were distributed for release directly to farmers through pastoral industry networks and events Initial results indicate that while the parasitoid established rapidly at Taranaki and Waikato nursery sites as anticipated it has failed to establish in Northland in two successive seasons

scholarly journals Effect of black legume aphid Aphis craccivora honeydew on survival of the parasitoid Microctonus aethiopoides

2013 ◽  
Vol 66 ◽  
pp. 153-156
Author(s):  
P.J. Gerard ◽  
K.R. Carswell ◽  
T.M. Eden
Keyword(s):  
Biocontrol Agent ◽  
Sucrose Solution ◽  
Aphis Craccivora ◽  
Available Energy ◽  
Sitona Lepidus ◽  
Nectar Sources ◽  
Clover Root ◽  
Additional Water ◽  
Microctonus Aethiopoides ◽  
Aphid Honeydew

The introduced parasitoid Microctonus aethiopoides (Hymenoptera Braconidae) appears to be an effective biocontrol agent for clover root weevil Sitona lepidus Gyllenhal (Coleoptera Curculionidae) in New Zealand pastures As these pastures lack accessible nectar sources hemipteran honeydew may be the most readily available energy source for the parasitoid Experiments were undertaken to compare longevity of newly emerged M aethiopoides adults caged on white clover firstly with and without black legume aphid Aphis craccivora Kock (Hemiptera Aphididae) and then with additional water and sucrose solution treatments Parasitoids with access to aphid honeydew lived significantly longer (mean longevity 81 days) than those with water or no liquid (both 68 days) but not as long as those fed sucrose solution (109 days) Therefore the abundance of aphids commonly present on clovers may enhance M aethiopoides longevity and therefore efficacy in the field especially in mid spring when host availability is very low

scholarly journals Establishing the fungus Beauveria bassiana in pasture for clover root weevil (Sitona lepidus) control

2004 ◽  
Vol 57 ◽  
pp. 314-318 ◽  
Author(s):  
T.L. Nelson ◽  
B.E. Willoughby ◽  
D. Wilson ◽  
T. Eden ◽  
T.R. Glare
Keyword(s):  
New Zealand ◽  
Beauveria Bassiana ◽  
Fungal Inoculum ◽  
Sitona Lepidus ◽  
Introduced Pest ◽  
Clover Root ◽  
Successful Establishment ◽  
Second Year ◽  
Fungus Beauveria Bassiana

The fungus Beauveria bassiana is a virulent pathogen of the clover root weevil a major introduced pest of clover in New Zealand Trials to investigate establishment of fungal inoculum in pasture were conducted in the Waikato region of New Zealand Granular formulations of conidia based on biopolymer technology successfully allowed the established of fungus in pasture However it did not support survival of inoculum into the second year Conidia on rice and conidial emulsions resulted in more successful establishment These results have implications for development of a biopesticide for clover root weevil based on B bassiana

scholarly journals Rationale for release of the Irish strain of Microctonus aethiopoides for biocontrol of clover root weevil

2006 ◽  
Vol 59 ◽  
pp. 285-289 ◽  
Author(s):  
P.J. Gerard ◽  
M.R. McNeill ◽  
B.I.P. Barratt ◽  
S.A. Whiteman
Keyword(s):  
New Zealand ◽  
Host Range ◽  
Biocontrol Agent ◽  
Hazardous Substances ◽  
Sitona Lepidus ◽  
Clover Root ◽  
Microctonus Aethiopoides ◽  
Poor Efficacy

A European biotype of Microctonus aethiopoides was identified as the best candidate biocontrol agent for Sitona lepidus a serious New Zealand pasture pest A Moroccan biotype was already present throughout the country and hence there was no requirement to obtain Hazardous Substances and New Organisms (HSNO) Act approval to release new biotypes However as research had shown mating between the two biotypes produced hybrids with poor efficacy against target hosts and that the Moroccan biotype attacked several native weevil genera serious reservations were held about introducing the European biotype Concerns were overcome with the identification of a parthenogenetic strain of European M aethiopoides from Ireland which has little risk of hybridisation and a narrower host range than the Moroccan biotype Following regulation of M aethiopoides as a risk species this strain was considered to be a new organism Approval was sought and gained under the HSNO Act to release the strain

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