Entomology Commons^™

Review Of Adaptations Of Velvet Ants (Hymenoptera: Mutillidae), Mark Deyrup

The Great Lakes Entomologist

Mutillid wasps are active and conspicuous insects, but their interactions with each other and with other animals are seldom observed. Mostly indirect evidence is used to postulate that an array of traits represents adaptations to exploit ground-nesting, aggressive, often highly dispersed hosts. The massive exoskeleton protects the parasitoid invading nests of biting and stinging hosts; certain unrelated parasitoids attacking the same hosts are similarly armored. Female aptery occurs in mutillids and in many other wasps attacking soil-dwelling hosts. In at least two mutillid lineages, female aptery apparently led to phoretic copulation, which led in turn to selection for large size …

Effects Of Soil Silicon Amendment And Nitrogen Levels On Rice Insect Pest Complex, James Michael P. Villegas

LSU Master's Theses

Rice plants are consistently subjected to various pressures by insect pests throughout the growing season. The main insect pest complex reported in Louisiana are the rice water weevil (major early-season insect pest), fall armyworm (sporadic early-season pest), sugarcane borer and rice stalk borer (long- established but sporadic stem boring pests), Mexican rice borer (an invasive stem-boring pest), and rice stink bug (major late-season pest). Soil silicon amendment has been shown to enhance plant resistance against herbivorous pests. Rice is a typical silicon-accumulating graminaceous crop. Field and greenhouse experiments were conducted from 2015 to 2017 to investigate the effects of soil …

Incorporation Of Biorationals And Trap Crop For Stink Bug Management In Soybeans, Kukuh Hernowo

LSU Doctoral Dissertations

Stink bugs are one of the most important seed sucking pests impacting soybean production in Louisiana. Exploration of chemicals that exhibit attraction or repellent activities toward this major pest would be beneficial to develop a push-pull strategy against this pest complex. Spinosad and neem are two commercially available natural insecticides that were claimed to have attractant and repellent activities against stink bugs. To test the potential of these chemicals, a series of experiments was conducted to investigate the olfactory, tactile, feeding, and oviposition preference of stink bugs toward different commercial spinosad products and neem. Additionally, two years of field experiments …

A Procedure For Sampling Nymphs Of Saratoga Spittlebug, Aphrophora Saratogensis (Homoptera: Cercopidae), Using Percentage Of Sample-Units Infested, Louis F. Wilson, Sharon L. Hobrla

The Great Lakes Entomologist

A method is proposed for rapidly estimating the nymphal population of the Saratoga spittlebug on alternate host plants in young red pine plantations. The method is based on an assumption that the number of nymphs per sample unit is distributed within an infested plantation according to the negative binomial distribution. This method can be 1.1-11.0 times more efficient depending upon the density of plants and the nymphal population level.

Life History And Laboratory Rearing Of Gerris Argenticollis (Hemiptera: Gerridae) With Descriptions Of Immature Stages, Peter P. Korch Iii, J. E. Mcpherson

The Great Lakes Entomologist

The life history of Gerris argenticollis was investigated in Jackson County, Illinois, March-June 1986, and the immature stages were described. The water strider also was reared from egg to adult under laboratory conditions. This univoltine species overwintered as adults that became active in early March, appearing on a temporary woodland pond after the air temperature exceeded 12°C. Seasonal occurrence of the adults and immatures is discussed. Adults were last observed in mid-June. Feeding records are given. G. argenticollis was reared on Drosophila melanogaster adults under a 10L: 14D photoperiod (ca. 2800 lux) at ca. 21°C. The incubation period averaged 12.5 …

Exploitation Of Eggs Of The Colorado Potato Beetle, Leptinotarsa Decemlineata (Coleoptera: Chrysomelidae), By The Exotic Egg Parasitoid Edovum Puttleri (Hymenoptera: Eulophidae) In Eggplant, Charles E. Williams

The Great Lakes Entomologist

Edovum puttleri is a newly discovered, exotic, egg parasitoid of the Colorado potato beetle, (CPB) Leptinotarsa decemlineata. The exploitation of CPB eggs by E. puttleri was examined in a New Jersey eggplant field. E. puttleri parasitized 46.8% of the CPB eggs present in the field. Exploitation of eggs within eggmasses was high; 73.9% of CPB eggs in eggmasses attacked by E. puttleri were parasitized.

Influence Of Temperature On Egg Production In Sunflower Stem Weevil Cylindrocopturus Adspersus (Coleoptera: Cucurlionidae), John F. Barker

The Great Lakes Entomologist

Controlled laboratory experiments were conducted to study the influence of temperature on production of eggs by a sunflower stem weevil Cylindrocopturus adspersus. Maximum egg production occurred when the temperature was 30± 1°C. At 27C the rate of egg production was lower than at 30°C but significant only at the P < 0.1 level. At 20, 23. and 35C egg production was significantly lower than at 30°C (P < 0.05) indicating that temperature can be an important factor in regulating the fecundity of this species.

Observations Of The Habits Of Corthylus Punctatissimus (Coleoptera: Scolytidae) Infesting Maple Saplings In Central Michigan, Richard A. Roeper, Brian J. Palik, Demetrios V. Zestos, Patrick G. Hesch, Celia Duke Larsen

The Great Lakes Entomologist

Corthylus punctatissimus, the pitted ambrosia beetle, infested and killed maple saplings that were 3-12 years of age with a basal diameter of 4-14 mm. The habits of the parental pair of adults are described. The beetles construct a spiral gallery system with about five egg niches per host. Half the brood reaches adult stage during the summer with a sex ratio of 1:1. No relationship was found between the number of niches, length of gallery system, or diameter of stem.

Bibliography Of Sequential Sampling Plans In Insect Pest Management Based On Wald's Sequential Probability Ratio Test, Gary W. Fowler, Ann M. Lynch

The Great Lakes Entomologist

This paper contains 65 references dealing with the development of sequential sampling plans in insect pest management based on Wald's Sequential Probability Ratio Test (SPRT), 25 in forest entomology and 40 in agriculture entomology. The insect(s) sampled, whether the decision procedure was based on one or two SPRTs, and the mathematical distribution and probabilities of Type I and Type II errors used to develop the SPRTs are also given for each sequential sampling plan.

Regression Equations And Table For Estimating Numbers Of Eggs In Spruce Budworm (Lepidoptera: Tortricidae) Egg Masses In Michigan, Gary W. Fowler, Bruce A. Montgomery, Gary A. Simmons

The Great Lakes Entomologist

Three simple linear regression equations were developed to estimate the numbers of eggs in spruce budworm, Choristoneura fumiferana, egg masses in Michigan. One equation was developed for each of 2-row, 2- row + , and 3-row egg masses. A table of estimated numbers of eggs per egg mass is given for each of the three row types for egg mass lengths from 1 to 13 mm.

Bacteria As Ovipositional Attractants For Culex Pipiens (Diptera: Culicidae), C. Lee Rockett

The Great Lakes Entomologist

(excerpt)

The study of factors and mechanisms involving ovipositional attractants in mosquitoes is still a relatively new area of research. Some early workers in mosquito biology suggested that gravid mosquitoes simply scattered their eggs indiscriminately on available aquatic sites; however, numerous field studies have failed to provide any real evidence for indiscriminate oviposition. The current idea is that oviposition involves not only locating an aquatic site, but the selection of an environment containing the necessary physical, chemical, and biotic factors required for larval development. It is desirable for female mosquitoes to be able to detect a breeding site that can …

Regression Equations And Table For Estimating Numbers Of Eggs In Jack Pine Budworm (Lepidoptera: Tortricidae) Egg Masses In Michigan, Gary W. Fowler, Gary A. Simmons

The Great Lakes Entomologist

Three simple linear regression equations were developed to estimate the numbers of eggs in jack pine budworm, Choristoneura pinus pinus, egg masses in Michigan. One equation was developed for each of 2-row, 2-row +, and 3-row egg masses. A table of estimated numbers of eggs per egg mass is given for each of the three row types for egg mass lengths from 1 to 25 nun.

Head Capsule Widths As An Indicator Of The Larval Instar Of Codling Moth (Lepidoptera: Olethreutidae), Peter Weitzner, Mark E. Whalon

The Great Lakes Entomologist

Head capsule width was a reliable indicator of larval instar in a strain of Michigan codling moths, Cydia pomonella. Head capsules were 0.33, 0.50, 0.82, 1.18 and 1.55 mm in width from first to fifth instar respectively. Development as measured by days and degree days was much more variable than head capsule width in estimating larval instars.

Parasites Recovered From Overwintering Mimosa Webworm, Homadaula Anisocentra (Lepidoptera: Plutellidae), F. D. Miller, T. Cheetham, R. A. Bastian, E. R. Hart

The Great Lakes Entomologist

The mimosa webworm, Homadaula anisocentra, overwinters in the pupal stage. Two parasites, Parania geniculata and Elasmus albizziae, are associated with overwintering pupae or the immediate prepupal larvae. Combined parasitism during the winters of 1981-82,1982-83, and 1983-84 was 2.1,3.9, and 2.9%, respectively.

New Host Records Of Parasitic Hymenoptera In Clearwing Moths (Lepidoptera: Sesiidae), Foster Forbes Purrington, David G. Nielsen

The Great Lakes Entomologist

Synanthedon pictipes is host for Dibrachus cavus; Podosesia aureocincta hosts Phaeogenes ater, Macrocentrus marginator, and
Lissonota sp.; Podosesia syringae hosts Lissonota sp.

Habitats And Spider Prey Of Dipogon Sayi Sayi (Hymenoptera: Pompilidae) In Washington County, Maine, Daniel T. Jennings, Frank D. Parker

The Great Lakes Entomologist

Spider wasps were reared from three types of trap-nests deployed in strip-clearcut areas of a spruce-fir-mixed hardwood forest of Maine. Collections of Dipogon sayi sayi from Mooseborn National Wildlife Refuge, Washington County, represent the easternmost records for the United States. Spider prey included females of Misumena vatia, Xysticus emertoni (new prey record), and X. punctatus, and juveniles and penultimate males of Xysticus sp. We found no evidence of nest-site competition between spider wasps and eumenid wasps (Hymenoptera: Eumenidae) that prey on spruce budwornl, Choristoneura fumiferana, when available nesting sites ranged from 320 to 4400,

Spruce Budworm And Other Lepidopterous Prey Of Eumenid Wasps (Hymenoptera: Eumenidae) In Spruce-Fir Forests Of Maine, Judith A. Collins, Daniel T. Jennings

The Great Lakes Entomologist

Three species of eumenid wasps, Ancistrocerus adiabatus, Ancistrocerus antilope, and Euodynerus Ieucomelas, accepted and provisioned trap-nesting blocks with lepidopterous larvae, A pyralid. Nephopteryx sp., was the most commonly provisioned prey. A. adiabarus and E. leucomelas preyed on late instars of the spruce budworm, Choristoneura fumiferana: however. budworms accounted for only 6% of the provisioned prey. Estimates of budworm population densities before and after wasp predation, and subsample-s of provisioned prey indicated no significant reductions i = 0.065%) in budworm populations attributable to trap-nesting wasps.

Further Observations On The Nesting Behavior Of Liris Argentatus (Hymenoptera: Sphecidae), Frank E. Kurczewski, Margery G. Spofford

The Great Lakes Entomologist

A three-celled nest of Liris argentatus was excavated and examined in upstate New York. The nest was constructed from the terminus of an abandoned cicada-killer burrow and the cells contained 1-4 incompletely paralyzed Gryllus pennsylvanicus as prey. Two of the three cells were cleptoparasitized by the satellite fly Senotainia trilineata. The components of the ecology and behavior of L. argentatus we observed are compared with those from previous studies on this species.

Leptoglossus Corculus And Leptoglossus Occidentalis (Hemiptera: Coreidae) Attacking Red Pine, Pinus Resinosa, Cones In Wisconsin And Minnesota, Steven A. Katovich, Herbert M. Kulman

The Great Lakes Entomologist

Leptoglossus corculus and Leptoglossus occidentalis are recorded feeding on red pine cones and conelets in Wisconsin and L. occidentalis is recorded feeding on red pine conelets in Minnesota.

Life History, Damage, And Gall Development Of The Gall Midge, Neolasioptera Brevis (Diptera: Cecidomyiidae), Injurious To Honeylocust In Michigan, Louis F. Wilson, George C. Heaton

The Great Lakes Entomologist

Neolasioptera brevis is univoltine in Michigan. Adults issue in late spring, and females deposit eggs in rows on the lower side of young shoots of honeylocust. Larval eclosion occurs shortly after: there are three larval instars. The gall is polythalamous and may have 20 or more larvae. The third-instar larvae overwinter, and pupation occurs in spring. The gall injury kills sorne shoots, but most damage is cosmetic. One can monitor for adult emergence in late April or May by observing cast pupal cases protruding from the gall. Control, if needed, should be directed at adults.