scholarly journals Survival of Conidia of Discula destructiva in Frass of the Convergent Lady Beetle

Plant Disease ◽  
1999 ◽  
Vol 83 (9) ◽  
pp. 806-809 ◽  
Author(s):  
Bryan E. Hed ◽  
Mark T. Windham ◽  
Jerome F. Grant
Keyword(s):  
Lady Beetle ◽  
Hippodamia Convergens ◽  
Discula Destructiva ◽  
Lady Beetles

The survival of conidia of Discula destructiva in frass of convergent lady beetles (Hippodamia convergens) was investigated. D. destructiva was isolated from frass pellets of 76% of adult convergent lady beetles exposed to D. destructiva for 1 h. Of the beetles from which D. destructiva was initially isolated, more than 80, 32, 19, 13, and 12.5% retained viable conidia of D. destructiva internally for at least 12, 24, 48, 72, and 96 h, respectively. Numbers of conidia, estimated with a hemacytometer, ranged from 0 to 3.2 × 106 conidia per frass pellet.

scholarly journals Density and Survival of Lady Beetles (Coccinellidae) in Overwintering Sites in Manitoba

2004 ◽  
Vol 118 (3) ◽  
pp. 309 ◽  
Author(s):  
W. J. Turnock ◽  
I. L. Wise
Keyword(s):  
Leaf Litter ◽  
Coccinella Septempunctata ◽  
Lady Beetle ◽  
Hippodamia Convergens ◽  
Beach Ridge ◽  
The South ◽  
Lady Beetles ◽  
South Shore ◽  
The Mean ◽  
Overwintering Survival

The densities of lady beetles, Coccinellidae, overwintering as adults (adults per m2) in leaf litter collected in late October for two years in a beach-ridge forest on the south shore of Lake Manitoba were 56.4 for the Thirteen-spotted Lady Beetle, Hippodamia tredecimpunctata (Say), 38.3 for the Seven-spotted Lady Beetle, Coccinella septempunctata (L.), 7.7 for the Transverse Lady Beetle, Coccinella transversoguttata richardsonii Brown, 1.6 for the Convergent Lady Beetle, Hippodamia convergens Guerin, and 0.6 for the Parenthesis Lady Beetle, Hippodamia parenthesis (Say). The mean overwintering survival for these species was 0.254, 0.036, 0.023, 0.0, and 0.0, respectively. The density of overwintering coccinellids was highest near the margins of the forest, particularly on the beach side, where beetles from shore appear to have entered the forest. The mean density over 3 years (2.9 per m2) of all coccinellid species in November in the litter under a remnant grove of riverbank forest in Winnipeg, was lower than in the beach-ridge forest (104.8 per m2), but their survival (0.460) was higher than in the beach-ridge forest (0.154). More species of coccinellids were found in the samples from the riverbank forest than from the beach-ridge forest.

scholarly journals Interactions of ants with native and invasive lady beetles and the role of chemical cues in intraguild interference

Chemoecology ◽  
2021 ◽  
Author(s):  
Roman Bucher ◽  
Laura M. Japke ◽  
Ayse Gül Ünlü ◽  
Florian Menzel
Keyword(s):  
Chemical Cues ◽  
Harmonia Axyridis ◽  
Species Recognition ◽  
Lady Beetle ◽  
Lasius Niger ◽  
Beetle Species ◽  
Beetle Elytra ◽  
Lady Beetles ◽  
Ant Aggression

AbstractThe predator-predator naïveté hypothesis suggests that non-native predators benefit from being unknown to native predators, resulting in reduced intraguild interference with native predators. This novelty advantage should depend on the ability of native predators to recognize cues of non-native predators. Here, we compared ant aggression and lady beetle reaction in four native and the invasive lady beetle species Harmonia axyridis. In addition, we tested whether lady beetle cuticular hydrocarbons (CHCs) are involved in species recognition, which might explain naïveté if the invasive species has a specific CHC profile. To this end, we conducted behavioral assays confronting two native ant species with both living lady beetles and lady beetle elytra bearing or lacking CHCs of different lady beetle species. Finally, we characterized CHC profiles of the lady beetles using GC–MS. In general, the aggression of Lasius niger was more frequent than that of Myrmica rubra and L. niger aggression was more frequent towards most native lady beetle species compared to H. axyridis. The removal of CHCs from lady beetle elytra reduced aggression of both ant species. If CHCs of respective lady beetle species were added on cue-free elytra, natural strength of L. niger aggression could be restored. CHC analyses revealed a distinct cue composition for each lady beetle species. Our experiments demonstrate that the presence of chemical cues on the surface of lady beetles contribute to the strength of ant aggression against lady beetles. Reduced aggression of L. niger towards H. axyridis and reduced avoidance behavior in H. axyridis compared to the equally voracious C. septempunctata might improve the invasive lady beetle’s access to ant-tended aphids.

scholarly journals Review of lady beetles in the Cycloneda germainii species complex (Coleoptera; Coccinellidae: Coccinellinae: Coccinellini) with descriptions of new and unusual species from Chile and surrounding countries

Zootaxa ◽  
2006 ◽  
Vol 1311 (1) ◽  
pp. 13 ◽  
Author(s):  
GUILLERMO GONZÁLEZ ◽  
NATALIA J. VANDENBERG
Keyword(s):  
New Species ◽  
Species Complex ◽  
Lady Beetle ◽  
Valid Species ◽  
Beetle Species ◽  
Lady Beetles ◽  
Three New Species

A complex of lady beetle species including Cycloneda germainii (Crotch) is reviewed and seven valid species recognized, including C. germainii, C. eryngii (Mulsant), C. sicardi (Brèthes), C. boliviana (Mulsant), and three new species, C. lacrimosa González & Vandenberg, n. sp., C. disconsolata Vandenberg & González, n. sp., and C. patagonica González & Vandenberg, n. sp.

scholarly journals Competition for Aphid Prey between Different Lady Beetle Species in a Laboratory Arena

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Christy Leppanen ◽  
Andrei Alyokhin ◽  
Serena Gross
Keyword(s):  
Native Species ◽  
Harmonia Axyridis ◽  
Coccinella Septempunctata ◽  
Lady Beetle ◽  
Macrosiphum Euphorbiae ◽  
Beetle Species ◽  
Lady Beetles ◽  
Aphid Prey ◽  
Aphid Consumption ◽  
Asymmetric Interactions

Direct competition for aphid prey (Hemiptera: Aphididae) was evaluated between and among several lady beetle species (Coleoptera: Coccinellidae). The behavior of three native (Coccinella trifasciata, Coleomegilla maculata,andHippodamia convergens) and four nonnative (Coccinella septempunctata,Harmonia axyridis,Hippodamia variegata,andPropylea quatuordecimpunctata) lady beetles was observed in laboratory arenas. The beetles were kept alone, paired with conspecifics or paired with heterospecifics, and presented with potato aphids (Macrosiphum euphorbiae).Harmonia axyridiswas the most successful aphid predator in our study, being able to find aphids more quickly and consume more of them compared to most other lady beetle species. It was also by far the most aggressive of the tested species.Coccinella septempunctata, C. trifasciata,andC. maculatagenerally followedH. axyridisin aphid consumption. Prey discovery, consumption, and aggressive behaviors were dependent on which species were present in the arena. Except for the generally superiorH. axyridis, there was no obvious dominance hierarchy among the other tested species and no dichotomy between the native and non-native species. Asymmetric interactions between lady beetle species may affect their abilities to coexist in the same habitat.

scholarly journals Comparative Studies of Three Populations of the Lady Beetle Predator Hippodamia convergens (Coleoptera: Coccinellidae)

2001 ◽  
Vol 84 (1) ◽  
pp. 55 ◽  
Author(s):  
John J. Obrycki ◽  
Elliot S. Krafsur ◽  
Carlos E. Bogran ◽  
Luis E. Gomez ◽  
Ronald E. Cave
Keyword(s):  
Comparative Studies ◽  
Lady Beetle ◽  
Hippodamia Convergens

Effect of cotton genotypes on numbers of adult lady beetles (Coleoptera: Coccinellidae)

1987 ◽  
Vol 108 (3) ◽  
pp. 687-689
Author(s):  
H. L. Bhardwaj ◽  
J. B. Weaver
Keyword(s):  
Control Measure ◽  
Heliothis Zea ◽  
Lady Beetle ◽  
Coleomegilla Maculata ◽  
Cotton Pests ◽  
Calcium Arsenate ◽  
Lady Beetles ◽  
Cotton Genotypes ◽  
Small Container ◽  
Cotton Fields

Predatory arthropods can play an important role in the natural control of cotton pests, including bollworms (Heliothis zea Boddie and H. virescens F.). Smith & Fontenot (1942) reported that widespread use of calcium arsenate in cotton fields reduced the number of coccinellids, which resulted in increased damage by pests. Ewing & Ivy (1943) confined several predacious insects collected from cotton (individually in jelly glasses fitted with slightly moistened blotting paper) and supplied them daily with eggs deposited by insectary-reared bollworm moths. The maximum number of eggs destroyed in a day by a single adult of the convergent lady beetle (Hippodama convergent Guerin-Meneville) was 275. Adults of another species of lady beetle (Coleomegilla fuscilabris Muls.) frequently consumed all the eggs given them, an adult on average consuming 22 eggs per day. All the 12 species of predacious insects found in cotton fields survived on bollworm eggs. Whitcomb & Bell (1964) showed that the three most common lady beetles in cotton fields in Arkansas were: (1) spotted lady beetles (Coleomegilla maculata De Geer), (2) convergent lady beetles, and (3) ninespotted lady beetles (Ciccinella novemnotata Herbst). They recorded 24 species of lady beetles, all feeding on lepidopterous eggs including those of bollworms. Many of these predators were captured while feeding on small bollworm larvae. Van den Bosch & Kagen (1966) proposed guidelines for the mass releases of convergent lady beetle adults as a pest control measure in cotton. Lingren, Ridgway & Jones (1968) reported from small-container experiments that adult females of convergent lady beetles consumed an average of 129·9 bollworm eggs per day.

Population genetics of the predatory lady beetle Hippodamia convergens

2015 ◽  
Vol 84 ◽  
pp. 1-10 ◽  
Author(s):  
Arun Sethuraman ◽  
Fredric J. Janzen ◽  
John Obrycki
Keyword(s):  
Population Genetics ◽  
Lady Beetle ◽  
Hippodamia Convergens

scholarly journals Thiamethoxam Differentially Impacts the Survival of the Generalist Predators, Orius insidiosus (Hemiptera: Anthocoridae) and Hippodamia convergens (Coleoptera: Coccinellidae), When Exposed via the Food Chain

2020 ◽  
Vol 20 (4) ◽  
Author(s):  
Carlos J Esquivel ◽  
Erick J Martinez ◽  
Raven Baxter ◽  
Rogelio Trabanino ◽  
Christopher M Ranger ◽  
...  
Keyword(s):  
Food Chain ◽  
Time Course ◽  
Ecological Impact ◽  
Aphis Gossypii ◽  
Lady Beetle ◽  
Generalist Predators ◽  
Hippodamia Convergens ◽  
Orius Insidiosus ◽  
Control Programs ◽  
Predatory Insects

Abstract Insect predators are seldom considered during toxicological trophic assessments for insecticide product development. As a result, the ecological impact of novel insecticides on predators is not well understood, especially via the food chain, i.e., when their prey is exposed to insecticides. Neonicotinoids are systemic insecticides widely used in agriculture to control herbivorous insects, but their effects on predatory insects via the food chain have not been well characterized. In this study, we documented the time-course effects of the neonicotinoid thiamethoxam on the survival of two predators, the insidiosus flower bug Orius insidiosus (Say) and the convergent lady beetle Hippodamia convergens Guérin-Méneville, when preying upon the aphids Aphis glycines Matsumura (Hemiptera: Aphididae), Aphis gossypii Glover (Hemiptera: Aphididae), and Myzus persicae (Sulzer) (Hemiptera: Aphididae). Aphids were exposed to thiamethoxam-treated or untreated plants every week over the course of 5 wk. After transferring aphids to Petri dishes, predators were allowed to feed on aphids. We found that the survival of the insidiosus flower bug, but not the convergent lady beetle, was reduced after consuming aphids reared on thiamethoxam-treated plants compared to untreated plants. Survival reduction of the insidiosus flower bug was observed only during the first weeks after thiamethoxam application; no reduction occurred 28 d after treatment or beyond. These results demonstrate that a systemic application of thiamethoxam could be compatible with convergent lady beetles and insidiosus flower bugs, if the time of predator release does not coincide with thiamethoxam activity. These findings are critical for the development of future pest control programs that integrate biological and chemical control.

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