Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Robert L. Pienkowski"'
Publikováno v:
Journal of Economic Entomology. 86:1151-1156
Stored cocoa beans ( Theobroma cacao L.) were sampled from dockside warehouses in Norfolk, VA, to determine the effect on insect populations of using covers of plastic sheeting to contain dichlorvos in an open warehouse versus the use of the chemical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c83edc184d1311a93b3ad3514bfdf75
https://doi.org/10.1093/jee/86.4.1151
https://doi.org/10.1093/jee/86.4.1151
Autor:
Patrick Parkman, Robert L. Pienkowski
Publikováno v:
Journal of Economic Entomology. 83:1246-1249
Fecundity and longevity were determined for adult Liriomyza trifolii (Burgess) that survived treatments of neem seed extract as immatures. Soil drenches of 1.0 and 2.0 ppm azadirachtin, an insecticidal component of neem extract, applied to infested c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06ff8842541e0c002047eabc4db23600
https://doi.org/10.1093/jee/83.4.1246
https://doi.org/10.1093/jee/83.4.1246
Autor:
Patrick Parkman, Robert L. Pienkowski
Publikováno v:
The Florida Entomologist. 74:473
Exposure to cold temperatures or CO2 has been used often to immobilize insects and several studies have dealt with the short and long term effects of exposure to cold and CO2 (Edwards & Patton 1965, Edwards 1968, Hooper 1970, Speirs & Zettler 1972, B
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f5089bb047bc1d0f9da93576a2e2d50
https://doi.org/10.2307/3494845
https://doi.org/10.2307/3494845
Publikováno v:
Annals of the Entomological Society of America. 82:166-171
The effects of polymorphic development on the life history of the redlegged grasshopper, Melanoplus femurrubrum (DeGeer), were investigated. In a population reared from field-collected eggs, the developmental threshold for six- and seven-instar group
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ced3ee255b110432881a0b94b58eb204
https://doi.org/10.1093/aesa/82.2.166
https://doi.org/10.1093/aesa/82.2.166
Publikováno v:
Journal of Economic Entomology. 75:425-430
A study of sampling techniques for adults of Empoasca (abae (Harris) in alfalfa was undertaken to derive ahsolute-density estimates from sweep-net sampling. A comparison of three absolute-density techniques showed that either the D-VacR or a modified
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2aabc3f5be3be685e2f433f568bed03f
https://doi.org/10.1093/jee/75.3.425
https://doi.org/10.1093/jee/75.3.425
Autor:
Robert L. Pienkowski, Rodney H. Ward
Publikováno v:
Environmental Entomology. 7:536-540
Five species of parasites were reared from the larval, pupal, or adult stages of Cassida rubiginosa Muller (Coleoptera: Chrysomelidae), collected from northern Virginia during 1973 and 1974. They were: Tetrastichus rhosaces (Walker) (Hymenoptera: Eul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::827d4910ee85b7ac3bde44cd3f430287
https://doi.org/10.1093/ee/7.4.536
https://doi.org/10.1093/ee/7.4.536
Publikováno v:
Entomologia Experimentalis et Applicata. 44:75-80
Ovariole number in univoltine populations of the grasshoppers Melanoplus femurrubrum (De Geer) and M. scudderi scudderi (Uhler) (Orthoptera: Acrididae) from Virginia was studied. Ovariole number in M. femurrubrum was found to vary among three geograp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2cd53307948d61f2cee5557454fab486
https://doi.org/10.1111/j.1570-7458.1987.tb02243.x
https://doi.org/10.1111/j.1570-7458.1987.tb02243.x
Autor:
Robert L. Pienkowski, W. A. Allen
Publikováno v:
Annals of the Entomological Society of America. 68:1001-1007
Life tables of Oscinella frit (L.) were prepared for the spring and summer generations of 3 consecutive years. Mortality of the insect prior to entry into the host was regarded as the key factor that regulated population changes in reed canarygrass.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2421efda488cb455155ee2670ff837b
https://doi.org/10.1093/aesa/68.6.1001
https://doi.org/10.1093/aesa/68.6.1001
Autor:
D. E. Simonet, Robert L. Pienkowski
Publikováno v:
Journal of Economic Entomology. 72:428-431
Egg, nymphal, and adult populations of Empoasca fabae (Harris) were monitored in 2 fields in Montgomery Co., Va., during 1976 and 1977. Centigrade degree day (COD) accumulations for egg and nymphal development were related to alfalfa growth and harve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::734123a3ce9cd44c24232a658fe32f18
https://doi.org/10.1093/jee/72.3.428
https://doi.org/10.1093/jee/72.3.428
Publikováno v:
Annals of the Entomological Society of America. 78:127-130
Ovariole number is useful in quantifying the reproductive potential of grasshoppers, because the number of eggs in a pod is equal to or less than the number of ovarioles. Ovariole number was determined for 10 species of melanopline grasshoppers. Regr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c03c2ddaa204d576c2a02f8c04e56d66
https://doi.org/10.1093/aesa/78.1.127
https://doi.org/10.1093/aesa/78.1.127