geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Effect of insecticides on survival, development, fecundity, and sex ratio in controlled infestations of western corn rootworm (Coleoptera: Chrysomelidae)


, : Effect of insecticides on survival, development, fecundity, and sex ratio in controlled infestations of western corn rootworm (Coleoptera: Chrysomelidae). Journal of Economic Entomology 84(6): 1905-1912

In a 4-yr study, granular soil insecticides were applied at planting time to plots of maize, Zea mays L., infested with population densities of eggs of western corn rootworms, Diabrotica virgifera virgifera LeConte, to determine how insecticides affected survival and development of immatures and female fecundity. Survival to adulthood differed among plots treated with different insecticides as well as among years of the study. Survival was generally highest in plots treated with insecticides that were the least water soluble (chlorpyrifos and fonofos) and lowest in plots treated with compounds that were the most water soluble (carbofuran and ethoprop). Survival was highest in years when precipitation and topsoil moisture were below normal during egg hatch and larval development and lowest when these conditions were above normal. Carbofuran, ethoprop, and chlorpyrifos delayed the mean emergence date in 1981. Only carbofuran delayed emergence in 1982, and none of the insecticides affected emergence in 1985. Mean percentage of survivors that were female differed each year (range, 23.2-45.3%). Egg density did not affect sex ratio. As reflected in the significant-year-by-insecticide interaction, some insecticides were inconsistent in their effect on sex ratios. In 1981, fecundity of survivors from plots treated with carbofuran, chlorpyrifos, terbufos, and isofenphos was significantly greater than that of survivors from plots treated with phorate, fonofos, and ethoprop or that were left untreated. Insecticides did not affect timing of oviposition, which began 2 wk after emergence and peaked when beetles were 4 wk old.

US$19.90

DOI: 10.1093/jee/84.6.1905


Other references

Milstein, A.; Hepher, B.; Teltsch, B., 1985: Principle component analysis of interactions between fish species and the ecological conditions in fish ponds ii. zooplankton. Interactions between fish species as to their effect on the zooplankton populations in the ponds were studied in ten ponds of 0.1 ha each. The ponds were stocked with bottom-feeding fish: common carp, Cyprinus carpio L., and male hybrid tilapia Or...

Vernon, M.E.; Bryan, G.; Hunt, P.; Allensworth, D.; Bradley, B., 1997: Immunization services for adolescents within comprehensive school health programs. Every school day, more than 95% of the nation's five- to 17-year-olds attend one of almost 110,000 elementary and secondary schools where they receive instruction in how to avoid major health-threatening behaviors. School is also the place wh...

Ren, S.; Ni, X.; Xu, H.; Den, J.; Wang, Y.; Sun, J.; Kong, Q.; Zha, J.; Jin, H.; Zhao, H.; Shen, L., 2011: The relationship between hand area and hand contamination. Although the number of colony-forming units (CFUs) on the hands of health care workers (HCWs) is a critical measurement in research studies of hand contamination, few studies have investigated the correlation between hand area and CFU count. In th...

Landeiro, Jé.Alberto.; Fonseca, E.Oliveira.; Monnerat, A.Lima.Cruz.; Taboada, G.Fernandes.; Cabral, G.Augusto.Porto.Sereno.; Antunes, F., 2015: Nonfunctioning giant pituitary adenomas: Invasiveness and recurrence. We report our surgical series of 35 patients with giant nonfunctioning pituitary adenomas (GNFPA). We analyzed the rule of Ki-67 antigen expression in predicting recurrence. Thirty-five patients were operated between 2000 and 2010. Suprassellar ex...

Luo, Y.; Yi, J.; Li, B.; Zhang, G., 2004: Novel ceramides and a new glucoceramide from the roots of Incarvillea arguta. Novel ceramides, rel-(3S,4S,5S)-3-((2R)-2-hydroxycosanoylapprxhexacosanoylamino)-4-hydroxy-5-((4Z)-tetradecane- 4-ene)-2,3,4,5-tetrahydrofuran (1a-g), and a new glucoceramide, 1-O-beta-D-glucopyranosyl-(2S,3S,4R,8E)-2-((2R)-2-hydroxytetracosanoyla...

Sahova, O.V., 1970: Role of the herb/moss layer in the water balance of a territory. cf. F.A. 32 No. 64.] Tabulates data on the species composition of the herb/moss layer in five different forest types (3 Birch, 1 Spruce, 1 Alder) in the Yaroslavl region of N. central Russia, and the proportions of the different species in the tot...

Tonti, E.; Fedeli, M.; Napolitano, A.; Iannacone, M.; von Andrian, U.H.; Guidotti, L.G.; Abrignani, S.; Casorati, G.; Dellabona, P., 2012: Follicular helper NKT cells induce limited B cell responses and germinal center formation in the absence of CD4(+) T cell help. B cells require MHC class II (MHC II)-restricted cognate help and CD40 engagement by CD4(+) T follicular helper (T(FH)) cells to form germinal centers and long-lasting Ab responses. Invariant NKT (iNKT) cells are innate-like lymphocytes that jumps...

Viskupic K.; Hodges K.V., 1998: The inheritance of accessory phases and the use of saturation temperatures for anatectic melts. Calculations of monazite saturation temperatures for a sample of Himalayan leucogranite clearly demonstrate the complexity introduced by the inheritance of accessory phases in calculating melt temperatures. Previous studies of Himalayan leucograni...

Johnsen, H.Erik.; Bøgsted, M.; Schmitz, A.; Bødker, J.Støve.; El-Galaly, T.Christoffer.; Johansen, P.; Valent, P.; Zojer, N.; Van Valckenborgh, E.; Vanderkerken, K.; van Duin, M.; Sonneveld, P.; Perez-Andres, M.; Orfao, A.; Dybkær, K., 2016: The myeloma stem cell concept, revisited: from phenomenology to operational terms. NlmCategory="UNASSIGNED">The concept of the myeloma stem cell may have important therapeutic implications, yet its demonstration has been hampered by a lack of consistency in terms and definitions. Here, we summarize the current docum...

Ahmad, N., 1942: Technological research on cotton in India being an account of the work done at the Indian Central Cotton Committee Technological Laboratory, 1924-1941. "In evolving new strains by hybridization it is necessary that the breeder has full knowledge of the fibre properties of the parent strains he wishes to cross". Information relating to this and many data from the study of the relationshi...