Interactions between Two Biological Control Agents and an Herbicide for Canada Thistle (Cirsium arvense) Suppression

2011 ◽  
Vol 4 (1) ◽  
pp. 151-158 ◽  
Author(s):  
Joanna K. Sciegienka ◽  
Elai N. Keren ◽  
Fabian D. Menalled
Keyword(s):  
Biological Control ◽  
Pseudomonas Syringae ◽  
Control Method ◽  
Management Program ◽  
Cirsium Arvense ◽  
Shoot Biomass ◽  
Control Methods ◽  
Biological Control Agents ◽  
Canada Thistle ◽  
Shoot Number

AbstractWe investigated the single and combined effects of two biological control agents, the stem-mining weevilHadroplontus lituraand the pathogenPseudomonas syringaepv.tagetis, with a herbicide (reduced or full application of glyphosate: 0.63 kg ae ha−1, or 3.78 kg ae ha−1, respectively) on the growth of Canada thistle,Cirsium arvense. We hypothesized that first, although each control method would have a negative effect on Canada thistle shoot biomass, root biomass, and shoot number, the integration of more than one control method would have greater impact than individual control methods. Second, we hypothesized that the order in which control methods are applied affects the outcome of the management program, with a pathogen application following weevil infestation being more effective than one prior to it. Although control methods impacted Canada thistle growth (P < 0.001, expect for a nonsignificant impact of glyphosate on shoot number), the combined effect of the three control methods behaved, generally, in an additive manner. A marginal interaction between the pathogen and the herbicide (P = 0.052) indicated a slight antagonistic interaction between these control methods. An interaction between the two biological control agents tested (P < 0.001) indicated that application of a pathogen prior to the release of weevil larvae could be more deleterious to Canada thistle than a late application. The observed, mostly additive, relationship between biological control agents and herbicides implies that integrating control methods rather than using a single approach could lead to greater Canada thistle control.

scholarly journals Reduction of Landscape Pathogens in Florida by Soil Solarization

Plant Disease ◽  
2002 ◽  
Vol 86 (12) ◽  
pp. 1388-1395 ◽  
Author(s):  
R. J. McGovern ◽  
R. McSorley ◽  
M. L. Bell
Keyword(s):  
Biological Control ◽  
Crown Rot ◽  
Soil Solarization ◽  
Shoot Biomass ◽  
Infested Soil ◽  
Pseudomonas Chlororaphis ◽  
Biological Control Agents ◽  
Central Florida ◽  
Air Space ◽  
Polyethylene Mulch

Two experiments were conducted during autumn 1997 and 1998 in west-central Florida to evaluate the effectiveness of soil solarization alone and in combination with the biological control agents Streptomyces lydicus (Actinovate) and Pseudomonas chlororaphis (syn. P. aureofasciens, AtEze) and the reduced-risk fungicide fludioxonil (Medallion) in managing soilborne pathogens of impatiens (Impatiens × wallerana, ‘Accent Burgundy’). Naturally infested soil was solarized for 47 or 48 days during September and October using two layers of 25-μm clear, low-density polyethylene mulch, separated by an air space of up to 7.5 cm. Solarization decreased the final incidence and progress of Rhizoctonia crown rot and blight, incidence of Pythium spp. in roots, and root discoloration, and increased shoot biomass in both experiments. The technique also consistently reduced root-knot severity and population densities of Meloidogyne incognita, Dolichodorus heterocephalus, Paratrichodorus minor, and Criconemella spp. The incidence of Rhizoctonia crown rot and blight was reduced by fludioxonil, but not by the biological control agents.

Regeneration of Canada Thistle (Cirsium arvense) from Intact Roots and Root Fragments at Different Soil Depths

Weed Science ◽  
2013 ◽  
Vol 61 (2) ◽  
pp. 277-282 ◽  
Author(s):  
Mette Goul Thomsen ◽  
Lars-Olav Brandsæter ◽  
Haldor Fykse
Keyword(s):  
Cirsium Arvense ◽  
Total Biomass ◽  
Layer By Layer ◽  
Canada Thistle ◽  
Soil Layers ◽  
Plant Parts ◽  
Shoot Number ◽  
Two Factors ◽  
Intact Root ◽  
Intact Roots

In the present field study, the capability of Canada thistle to develop shoots from intact roots and root fragments at different soil depths was studied. The experiments were performed on four sites with high-density Canada thistle, with three or four replications per treatment. At each site, the soil in the plots was removed layer by layer (to 30 or 40 cm, depending on the site), within a 1 by 1-m quadrat, and spread out on a plastic sheet. All roots and other plant parts were removed, and the soil was either replaced without any root material (two sites), or the roots of the thistles were cut into 10-cm-long fragments and replaced into the source holes (two sites). The measured variables were shoot number and biomass. The number of shoots of Canada thistle decreased with increasing depth (P < 0.001) and increased with time. Additionally, the two factors interacted (P < 0.001) such that shoot development was slower from greater depths. Roots from ≤ 20 cm depth produced higher biomasses than did roots from below 20 cm depth. Replacement of root fragments did not affect the amount of biomass produced. It was concluded that the intact root system contributed considerably more to the total biomass produced by Canada thistle than did the root fragments in the upper soil layers.

Integrated Pest Management for Crops and Pastures

2008 ◽  
Author(s):  
Paul Horne ◽  
Jessica Page
Keyword(s):  
Biological Control ◽  
Genetic Engineering ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Introduced Species ◽  
Chemical Control ◽  
Effective Control ◽  
Control Methods ◽  
Biological Control Agents ◽  
Cultural Changes

Integrated Pest Management for Crops and Pastures describes in straightforward language what is required for farmers to successfully implement Integrated Pest Management (IPM) in cropping and grazing operations. It explains the differences between conventional pesticide-based controls and IPM, and demonstrates the advantages of IPM. Effective control of pests depends on a number of approaches, not just chemical or genetic engineering. The opening chapters cover the different approaches to pest management, and the importance of identification and monitoring of pests and beneficials. Most farmers and advisors can identify major pests but would struggle to recognise a range of beneficial species. Without this information it is impossible to make appropriate decisions on which control methods to use, especially where pests are resistant to insecticides. The book goes on to deal with the control methods: biological, cultural and chemical. The biological control agents discussed include both native and introduced species that attack pests. Cultural changes that have led to an increase in the incidence or severity of pest attack are also examined. The chapter on chemical control describes the different ways chemicals can affect beneficial species, also detailing acute, sub-lethal and transient toxicities of pesticides, drawing on examples from horticulture where necessary. Finally, the authors bring all the components of integrated pest management together and show farmers how to put their IPM plan into action.

Using the Rosette Technique for Canada Thistle (Cirsium arvense) Control in Row Crops

1998 ◽  
Vol 12 (4) ◽  
pp. 699-706 ◽  
Author(s):  
Brett R. Miller ◽  
Rodney G. Lym
Keyword(s):  
Weed Management ◽  
Crop Production ◽  
Management Program ◽  
Cirsium Arvense ◽  
Herbicide Application ◽  
Canada Thistle ◽  
Row Crops ◽  
Row Crop ◽  
Herbicide Treatments ◽  
Standard Practices

Clopyralid applied to Canada thistle rosettes has provided better control in the following growing season than applications to bolted plants. The objectives of this research were to determine if using cultivation to prevent plants from bolting prior to herbicide application (the rosette technique) could be successfully incorporated into a row crop production system and to evaluate the effect of Canada thistle growth stage on the absorption and translocation of14C-clopyralid. Canada thistle control 8 mo after postharvest herbicide treatment (MAFT) using the rosette technique was similar to control when using conventional in-crop plus postharvest herbicide treatments in corn and soybean. Glyphosate and clopyralid plus 2,4-D were the most consistent postharvest herbicide treatments for Canada thistle control 8 MAFT in corn and soybean. Corn yields were similar, but soybean yields were slightly lower when Canada thistle was controlled using cultivation compared to conventional herbicide treatments.14C-clopyralid translocation to Canada thistle roots and lower shoot parts was greater when clopyralid was applied to the rosette stage than when applied to bolted Canada thistle plants. The increased translocation probably accounts for the increased Canada thistle control observed in the field. Incorporating the rosette technique into a weed management program should allow growers to control Canada thistle with less herbicide input than do standard practices.

scholarly journals Parasitoids of Delia planipalpis (Meigen) and Delia platura (Stein) (Diptera, Anthomyiidae) in Mexico

ZooKeys ◽  
2021 ◽  
Vol 1046 ◽  
pp. 177-187
Author(s):  
Paulina Nava-Ruiz ◽  
Ricardo Meraz-Álvarez ◽  
Jorge Valdez-Carrasco ◽  
Onésimo Chávez-López ◽  
Néstor Bautista-Martínez
Keyword(s):  
Biological Control ◽  
Brassica Campestris ◽  
Insect Pests ◽  
Management Program ◽  
Biological Control Agents ◽  
Raphanus Raphanistrum ◽  
Starting Point ◽  
Yield Quality ◽  
Sisymbrium Irio ◽  
Delia Platura

Among the insect pests that affect crucifer crops in Mexico are Delia planipalpis (Meigen) and D. platura (Stein). They are a threat to the production of these vegetables since the damage they cause directly and indirectly affects yield, quality, and commercialization of these crops. Nevertheless, the existence of natural enemies of these dipterans is still unknown. It is fundamental to determine which parasitoids or predators can be considered possible biological control agents in an integrated pest management program. The sampling sites were located in Guanajuato, Puebla, and the State of Mexico, where plants of Brassica oleracea L. var. italica Plenk and capitata L., B. napus L., and Raphanus sativus L. infested with Delia spp. were selected. The symptoms observed were wilting, yellowish, flaccid leaves and individuals less developed than the rest of the crop. These plants were extracted with their root and the surrounding soil. Also, wild crucifers were collected, such as Raphanus raphanistrum L., Brassica campestris L., and Sisymbrium irio L. The first records of Aphaereta pallipes Say (Hymenoptera, Braconidae), Trybliographa rapae (Westwood) (Hymenoptera, Figitidae), and Aleochara bimaculata Gravenhorst (Coleoptera, Staphylinidae) are reported parasitizing the puparia of these anthomyiid flies on cultivated and wild crucifers. This represents only a starting point for the continuous study of these parasitoids, which is needed to consider them useful for the biological control of D. planipalpis and D. platura.

CEUTORHYNCHUS LITURA (COLEOPTERA: CURCULIONIDAE): BIOLOGY AND FIRST RELEASES FOR BIOLOGICAL CONTROL OF THE WEED CANADA THISTLE (CIRSIUM ARVENSE) IN ONTARIO, CANADA

1973 ◽  
Vol 105 (12) ◽  
pp. 1489-1494 ◽  
Author(s):  
D. P. Peschken ◽  
R. W. Beecher
Keyword(s):  
Biological Control ◽  
Room Temperature ◽  
Release Site ◽  
Fold Increase ◽  
Circumstantial Evidence ◽  
Cirsium Arvense ◽  
Female Development ◽  
Canada Thistle ◽  
Breeding Stock ◽  
Puccinia Punctiformis

AbstractCeutorhynchus litura (F.) laid an average of 123 eggs per female. Development from egg to adult took about 6 weeks at room temperature, followed by an obligatory diapause of 3–4 months. In laboratory rearings a maximum of only an 8-fold increase over the original breeding stock was achieved in one generation. The weevil was released against the weed Canada thistle (Cirsium arvense (L.) Scop.) near Belleville, Ont., in 1967. Near the centre of the release site on about 400 m2, thistle shoots have decreased to 4% of their former density of about 3–7 shoots per 0.25 m2. Circumstantial evidence indicates that the weevil aided in the spread of thistle rust Puccinia punctiformis (Str.) Rohl.

scholarly journals Biological Control of the Raspberry Eriophyoid Mite Phyllocoptes gracilis Using Entomopathogenic Fungi

Horticulturae ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 54
Author(s):  
Camille Minguely ◽  
Lindsey Norgrove ◽  
Alexander Burren ◽  
Bastien Christ
Keyword(s):  
Biological Control ◽  
Entomopathogenic Fungi ◽  
Metarhizium Anisopliae ◽  
Fungal Spore ◽  
Control Methods ◽  
Biological Control Agents ◽  
Detached Leaves ◽  
Chemical Pesticides ◽  
Eriophyoid Mite ◽  
Mite Mortality

There is an urgent need to develop biological control methods against the eriophyoid mite, Phyllocoptes gracilis, which causes significant losses in organic raspberry production in Europe. The use of entomopathogenic fungi (EF) is a sustainable alternative to conventional chemical pesticides, reducing the risks of pesticide resistance and other negative environmental impacts of agriculture. The objective of this study was to assess the pathogenicity of three strains of EF, two of Beauveria bassiana and one of Metarhizium anisopliae, on P. gracilis under laboratory conditions. Fungal spore suspensions (1 × 107 spores per mL) were sprayed on detached leaves infested with P. gracilis. Treated mites were kept under controlled conditions (25 ± 3 °C, 72 ± 10% relative humidity and photoperiod of 16:8 (light/dark)) and mite mortality was assessed three, five and seven days after inoculation. At all three measurement points (days after inoculation), the mortality of P. gracilis was highest for B. bassiana strain BB 1.1 and M. anisopliae strain MA 10.1. Our data demonstrate that EFs are promising candidates for the development of biological control agents against P. gracilis in raspberry crops.

HOST SPECIFICITY AND SUITABILITY OF LEMA CYANELLA (COLEOPTERA: CHRYSOMELIDAE), A CANDIDATE FOR THE BIOLOGICAL CONTROL OF CANADA THISTLE (CIRSIUM ARVENSE)

1979 ◽  
Vol 111 (9) ◽  
pp. 1059-1068 ◽  
Author(s):  
D.P. Peschken ◽  
G.R. Johnson
Keyword(s):  
Biological Control ◽  
North America ◽  
Host Specificity ◽  
Biological Control Agent ◽  
Control Agent ◽  
Cirsium Arvense ◽  
Canada Thistle ◽  
Main Host ◽  
Disease Free

AbstractThe host specificity of Lema cyanella (L.) (Coleoptera: Chrysomelidae) and its suitability as a biological control agent were investigated. The females lay an average of 1564 eggs and development from egg to adult takes 17.6 days at 25°C during the day and 20°C during the night (average about 23°C). Feeding of adults and larvae is confined to Cirsium, Carduus, and Silybum species, and according to literature records, Cirsium arvense (L.) Scop. is the main host. No economic plants are attacked. A colony of field collected beetles imported from Germany was infected with a Nosema disease. It is recommended that disease free L. cyanella should be released against the weed C. arvense in North America.

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