Effect of Selected Insecticides on the Natural Enemies Coleomegilla maculata and Hippodamia convergens (Coleoptera: Coccinellidae), Geocoris punctipes (Hemiptera: Lygaeidae), and Bracon mellitor, Cardiochiles nigriceps, and Cotesia marginiventris (Hymenoptera: Braconidae) in Cotton

2000 ◽  
Vol 93 (6) ◽  
pp. 1638-1643 ◽  
Author(s):  
P. G. Tillman ◽  
J. E. Mulrooney
Keyword(s):  
Natural Enemies ◽  
Coleomegilla Maculata ◽  
Cotesia Marginiventris ◽  
Hippodamia Convergens ◽  
Geocoris Punctipes ◽  
Cardiochiles Nigriceps ◽  
Bracon Mellitor

Populations of Stink Bugs (Heteroptera: Pentatomidae) and their Natural Enemies in Peanuts

2008 ◽  
Vol 43 (2) ◽  
pp. 191-207 ◽  
Author(s):  
Glynn Tillman
Keyword(s):  
Natural Enemies ◽  
Developmental Stages ◽  
Seasonal Abundance ◽  
Stink Bug ◽  
Stink Bugs ◽  
Geocoris Punctipes ◽  
Oebalus Pugnax ◽  
Heteroptera Pentatomidae ◽  
Telenomus Podisi ◽  
On Farm

The objective of this on-farm study was to determine if peanuts harbor populations of stink bugs (Heteroptera: Pentatomidae) and their natural enemies in Georgia. Eight species of phytophagous stink bugs were found in peanuts over the 5-yr study. The predominant stink bug species were Nezara viridula (L.), Euschistus servus (Say), Euschistus quadrator (Rolston), and Oebalus pugnax pugnax (F.). The remaining 4 species, Acrosternum hilare (Say), Euschistus tristigmus (Say), Euschistus ictericus (L.), and Thyanta custator accerra McAtee, were found in relatively low numbers. All developmental stages of N. viridula, E. servus, E. quadrator, A. hilare, and O. p. pugnax were collected at various times in the study indicating that these 5 species of stink bugs were developing on this crop. Seasonal abundance of N. viridula and E. servus nymphs and adults provided further support that these 2 species of stink bugs developed on peanuts. At least 1 generation of N. viridula and E. servus occurred in peanuts each year, and generally some of the adults that developed on peanuts oviposited on peanuts producing another generation of nymphs in this crop. Because only adults of T. c. accerra, E. tristigmus, and E. ictericus were found in peanuts, these 3 stink bug species probably were not developing on this crop. Adult stink bugs were parasitized by the tachinid parasitoids Trichopoda pennipes (F.) and Cylindromyia spp. Stink bug eggs were parasitized by the scelionids, Trissolcus basalis (Wollaston), Trissolcus thyantae Ashmead, Trissolcus brochymenae (Ashmead), Telenomus podisi Ashmead, and Gryon obesum Masner, and an unknown encyrtid species. Geocoris punctipes (Say), Geocoris uliginosus (Say), Orius insidiosus (Say), Podisus maculiventris (Say), and Oxyopes salticus Hentz preyed on stink bugs in peanuts. Peanuts harbor populations of stink bugs and their natural enemies, and thus the role peanuts play in landscape ecology of stink bugs needs to be ascertained to better understand how to manage stink bug populations in landscapes in which peanuts are associated with other crops.

Mortality of the Corn Earworm (Lepidoptera: Noctuidae) on Sorghum Panicles in Georgia

2006 ◽  
Vol 41 (4) ◽  
pp. 292-304 ◽  
Author(s):  
P. Glynn Tillman
Keyword(s):  
Helicoverpa Zea ◽  
Larval Mortality ◽  
Egg Parasitoid ◽  
Corn Earworm ◽  
Cotesia Marginiventris ◽  
Mortality Factors ◽  
Geocoris Punctipes ◽  
Lady Beetles ◽  
Nuclear Polyhedrosis ◽  
Lepidoptera Noctuidae

The mortality of the corn earworm, Helicoverpa zea (Boddie), on sorghum panicles in Georgia was determined in a 2-yr study. Percent total real mortality (rx) of H. zea exceeded 99% for each year and planting date. Percent total real mortality was highest for eggs followed by 1st instars. Parasitization and predation were the primary mortality factors for eggs on sorghum panicles. Larval mortality was due in part to predation, parasitization, and infection by pathogens. Trichogramma pretiosum Riley was the only egg parasitoid observed on sorghum panicles. Orius insidiosus (Say) was the predominant predator of H. zea. Other predators observed feeding on H. zea included the big-eyed bug, Geocoris punctipes (Say), the spined soldier bug, Podisus maculiventris (Say), green lynx spiders, Peucetia viridans (Hentz), and lady beetles (mainly Hippodamia convergens Guérin-Méneville). A variety of parasitoids attacked larvae on sorghum. The braconid Cotesia marginiventris (Cresson) parasitized small to medium-sized larvae. The tachinids Eucelatoria rubentis Coquillett and Archytas marmoratus (Townsend) parasitized large larvae. Two pathogens, HzNPV, a naturally-occurring nuclear polyhedrosis virus of H. zea, and the fungus, Entomophthora aulicae (Reichardt) G. Winter, caused mortality of larvae. In conclusion, biological control by natural enemies of H. zea on sorghum panicles resulted in significant mortality for this pest.

SEASONAL ABUNDANCE AND DISTRIBUTION OF PREDATORS AND PARASITES ASSOCIATED WITH MONELLIOPSIS PECANIS BISSELL AND MONELLIA CARYELLA (FITCH) (HOMOPTERA: APHIDAE)1

1987 ◽  
Vol 22 (4) ◽  
pp. 336-347 ◽  
Author(s):  
J. V. Edelson ◽  
P. M. Estes
Keyword(s):  
Parasite Species ◽  
Coleomegilla Maculata ◽  
Seasonal Abundance ◽  
Hippodamia Convergens ◽  
Parasite Abundance ◽  
Arthropod Species ◽  
Tree Canopies ◽  
Abundance And Distribution ◽  
Aphid Abundance

A survey of predators and parasites associated with the pecan aphids Monelliopsis pecanis Bissell and Monellia caryella (Fitch), revealed the presence of approximately 33 aphidophagous arthropod species. The most abundant predators included Chrysopa rufilabris Burmeister, C. quadripunctata Burmeister, Micromus posticus (Walsh), Coniopteryx simplicior Meinander, Olla abdominalis (Say), Coleomegilla maculata (Mulsant), Hippodamia convergens Guerin-Mineville, and Allograpta oblique (Say). Three parasite species were collected and two subsequently identified from aphid mummies, including Aphelinus perpallidus Gahan, and Alloxysta schlingeri Andrews. Predators were most abundant at times of greatest aphid abundance; parasite abundance varied. No directional or height preferences in tree canopies were noted for predators or parasites.

Pest Insects and Natural Enemies in Transitional Organic Cotton in Georgia

2009 ◽  
Vol 44 (1) ◽  
pp. 11-23 ◽  
Author(s):  
Glynn Tillman ◽  
Marshall Lamb ◽  
Benjamin Mullinix
Keyword(s):  
Natural Enemies ◽  
Helicoverpa Zea ◽  
Insect Pests ◽  
Larval Mortality ◽  
Transitional Period ◽  
Seasonal Abundance ◽  
Red Imported Fire Ant ◽  
Stink Bugs ◽  
Geocoris Punctipes ◽  
Solenopsis Invicta Buren

This research was conducted in experimental plots in Georgia from 2004 through 2006 and assessed the prospects for transitioning to a totally organic management system for cotton. The seasonal abundance of insect pests and their natural enemies over the 3-yr transitional period are reported herein. The heliothines, Heliothis virescens (F.) and Helicoverpa zea (Boddie), and stink bugs, mainly Nezara viridula (L.), Euschistus servus (Say), and Euschistus quadrator (Rolston), were the 2 groups of insect pests found on cotton. Heliothine larvae were observed each year of the study but, in general, infestations of heliothines were higher in 2004 than in the other 2 yrs. Stink bugs were observed in relatively high numbers, and the percent of cotton bolls damaged by these pests was high only during year 2 of the study. Over the 3-yr period, the red imported fire ant, Solenopsis invicta Buren, various spiders, including Oxyopes scalaris Hentz and Peucetia viridans (Hentz), the big-eyed bug, Geocoris punctipes (Say), and the pirate bug, Orius insidiosus (Say), were the most abundant predators of the heliothines and stink bugs. The endoparasitoid Toxoneuron nigriceps Viereck and an ascovirus also contributed to larval mortality of H. virescens. The endoparasitoid Trichopoda pennipes (F.) parasitized adults of N. viridula.

SEASONAL OCCURRENCE AND RELATIVE ABUNDANCE OF APHID PREDATORS AND PARASITOIDS ON PUBESCENT POTATO PLANTS

1985 ◽  
Vol 117 (10) ◽  
pp. 1231-1237 ◽  
Author(s):  
John J. Obrycki ◽  
Maurice J. Tauber
Keyword(s):  
Solanum Tuberosum ◽  
Relative Abundance ◽  
Coleomegilla Maculata ◽  
Seasonal Occurrence ◽  
Hippodamia Convergens ◽  
Aphid Parasitoid ◽  
Potato Plants ◽  
Aphid Predators ◽  
Coccinella Transversoguttata

AbstractDuring 2 field seasons, Coccinellidae (primarily Coccinella transversoguttata richardsoni, Coleomegilla maculata, Hippodamia convergens, H. tridecimpunctata, and H. glacialis) were the most abundant predators on potato hybrids (Solanum tuberosum × S. berthaultii, F3) with various densities of glandular pubescence. Highly pubescent clones had the highest percentage of predator eggs, while clones with the lowest trichome densities had the highest percentages of immature and adult predators. By comparison, high numbers of aphid parasitoid mummies (primarily Aphidius and Praon spp.) occurred on clones with moderate to high densities of glandular pubescence. During both years, predators and parasitoids were most abundant in late July and August.

Differences in Flight Activity of Coleomegilla maculata and Hippodamia convergens (Coleoptera: Coccinellidae) Following Emergence, Mating, and Reproduction

2017 ◽  
Vol 46 (6) ◽  
pp. 1359-1364
Author(s):  
Ahmed H Abdel-Wahab ◽  
J P Michaud ◽  
Mohamed H Bayoumy ◽  
Samir S Awadalla ◽  
Mohamed El-Gendy
Keyword(s):  
Flight Activity ◽  
Coleomegilla Maculata ◽  
Hippodamia Convergens
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