Volume 46: Issue 4

Pheromone trap captures of Helicoverpa zea (Boddie) and Heliothis virescens (F.) from 2002 - 2005 were used to examine the distribution of these species across a multiple crop environment in southeast Arkansas. The greatest number of H. virescens moths was collected during 2003, but densities were low compared with H. zea throughout the study. Overall, fewer H. virescens moths were captured next to Bt corn and Bt cotton than next to nonBt cotton and early-maturing soybean. A significant relationship was not detected between pheromone trap captures of H. virescens and the percentage of these moths that fed on cotton as larvae. More H. zea moths were captured in traps located next to Bt corn and nonBt corn during the month of June than in traps located next to cotton, sorghum, or soybean, whereas traps located adjacent to early- and late-maturing varieties of soybean, Bt cotton, nonBt cotton, and grain sorghum captured greater numbers of moths than those traps located next to corn during July. Therefore, the distribution of H. zea appeared to be influenced by corn acreage during the month of June. Later in the season, this species was widely distributed across the agricultural landscape. Compared with 2 other regions of AR, fewer H. zea moths were captured during the month of June and more H. virescens moths were captured during August in Mississippi Co., an area of intense cotton production.

Reticulitermes flavipes (Kollar), R. virginicus Banks, and Coptotermes formosanus Shiraki were stressed by holding them at 25°C or 28°C, respectively, in metal pans for 5 d prior to introduction into 1 side of 3-jar arenas (3 containers connected serially) containing freshly-collected nestmates. After 14 d, mass loss of wooden blocks was determined for blocks from the arena side to which stressed termites were added (treated) as well as those from the opposite side (control). Feeding effects of termite exposure to stress were inconsistent among species. For R. flavipes, there was no significant difference in feeding; whereas loss of block mass on the treated side in R. virginicus arenas was significantly greater (P = 0.0017) than that on the control side of the arenas. For C. formosanus, mass loss of wafers also was significantly greater (P = 0.0284) on the treated side of the arenas, similar to the response of R. virginicus.

Ground-surface arthropods were captured by barrier pitfall traps over a 15-month period in an old-field habitat adjacent to a cotton field. Members of the Coleoptera, Orthoptera, and Araneae constituted 89% of the 11,496 captures. The most abundant species group was Gryllus sp. (Orthoptera: Gryllidae).The most abundant predator species was Megacephala Carolina L. (Coleoptera: Cicindelidae), present in atypically large numbers. The peak abundance of nymphal Gryllus sp. (July–October) overlapped the peak abundance period (August) of M. Carolina. Feeding experiments indicated M.Carolina adults were active predators on Gryllus sp. nymphs. As a potential biocontrol agent, methods to encourage M. Carolina adults to move each season from old-field habitats into adjacent crop fields should be considered.

Host plant foliage plays an important role in silkworm nutrition and, in turn, cocoon and silk production and quality (Nagaraju 2002, Current Sci. 83(4): 231; Seidavi et al. 2005, Asia Pac. J. Clin. Nutr. 14(Suppl):S122). Furthermore, nutritional management directly influences the quality and quantity of silk production in Bombyx mori L. (Murugan et al. 1998, J. Sci. Ind. Res. 57:740 - 745).

Mulberry leaves have been supplemented with various nutrients for silkworm feeding to promote silk quality and quantity and is a relatively recent technique in sericultural research (Murugan et al. 1998). Vitamins of the B-complex group and

Relationship Between Frankliniella occidentalis (Thysanoptera: Thripidae) Population Density and Three of Its Natural Enemies in Commercial Lemon Orchards in Mexico¹

Saúl Pardo-Melgarejo,

Filemón Morales-Hernández,

Jaime González-Cabrera,

Mario A. Miranda-Salcedo,

Juan Carlos Álvarez-Hernández,

J. Concepción Rodríguez-Maciel,

Alejandra Mondragón-Flores,

Bismarck Aguilar-Garzón, and

Karen Vianey Díaz Arias

Temporal and Spatial Distribution of Helicoverpa zea and Heliothis virescens (Lepidoptera: Noctuidae) Moths in Pheromone Traps across Agricultural Landscapes in Arkansas

Response of Subterranean Termites (Isoptera: Rhinotermitidae) to Stressed Nestmates

Ground-Surface Arthropods of an Old-Field Habitat in the Delta of Mississippi, with Emphasis on the Cicindelidae (Coleoptera)

Effects of Selected Defoliants in Combination with Insecticides on the Sweetpotato Whitefly (Hemiptera: Aleyrodidae) and Its Parasitoids in Cotton

Phenology of the Hemlock Woolly Adelgid (Hemiptera: Adelgidae) in Northern Georgia

House Fly (Diptera: Muscidae) Resting Preference on Various Cords and Potential of Fipronil- or Indoxacarb- Impregnation on Cords for Fly Control

Cryptic Association of Microdeuterus megacephalus (Hemiptera: Heteroptera: Acanthosomatidae) Nymphs with Ficus benjamina Fruits

Field Evaluations of Emamectin Benzoate for Control of Birch Leafminer (Hymenoptera: Tenthredinidae) in Interior Alaska

Response of Muga Silkworm, Antheraea assama Westwood (Lepidoptera: Saturniidae), to Ascorbic Acid Placed on Host Plant Leaves

Ticks and Lice of the Black Bear, Ursus americanus Pallas, in Northern Georgia, USA, Including a New State Record for the Chewing Louse, Trichodectes euarctidos (Phthiraptera: Trichodectidae)

Relationship Between Frankliniella occidentalis (Thysanoptera: Thripidae) Population Density and Three of Its Natural Enemies in Commercial Lemon Orchards in Mexico¹

A Review of the Host Plant Records of Phthorimaea absoluta (=Tuta absoluta) (Lepidoptera: Gelechiidae)¹

Carabidae (Coleoptera: Harpalinae: Harpalini: Harpalina) from an Upper Cretaceous Rock Deposit at Orapa Diamond Mine in Botswana¹

Chemical Mechanism of Exogenous Jasmonic Acid-Induced Resistance in Rose Against Spodoptera exigua (Lepidoptera: Noctuidae)¹

Interference with Fatty Acyl-CoA Reductase Reduces Wax Secretion and Influences the Development of Male Ericerus pela (Hemiptera: Coccoidae) Nymphs¹