Strategies targeting the biological control of the cherry bark tortrix (=CBT), Enarmonia formosan... more Strategies targeting the biological control of the cherry bark tortrix (=CBT), Enarmonia formosana (Scopoli) in North America have also included the search for potentially useful native hymenopterous parasitoids of the pest in Europe. The search for such agents undertaken in the central-east Europe (Czech Republic, Slovak Republic, Hungary) resulted in determination of several ichneumonid species (Campoplex cf. dubitator Horst., Liotryphon
Distribution of the cherry bark tortrix, Enarmonia formosana (Scopoli) (=CBT) was determined by d... more Distribution of the cherry bark tortrix, Enarmonia formosana (Scopoli) (=CBT) was determined by detecting the presence of their frass tubes on the trunk of rosaceous shrubs and trees throughout the Czech Republic. Tree disjunctive areas of CBT were indicated in the country. The overall distribution of CBT approximates the annual isothermes 8ā9Ā°C and 10ā11Ā°C, but a number of zonal exceptions
ABSTRACT The Carpathian Basin has been classified as one of the model areas of Russian wheat aphi... more ABSTRACT The Carpathian Basin has been classified as one of the model areas of Russian wheat aphid (= RWA), Diuraphis noxia (Kurdj.), expansion from the southeast to Central Europe. Explorations in 2002 as well as the summarized information published earlier centered the evidence for RWA in the northern and northeastern parts of the area and its occurrence was detected and verified in the area up to the submountains of the Carpathian Mountain Range. The history and distribution peculiarities of RWA in the Carpathian Basin and area are reviewed and discussed.
The feasibility of utilizing Pyemotes tritici as a biological control agent against the Mediterra... more The feasibility of utilizing Pyemotes tritici as a biological control agent against the Mediterranean flour moth, Anagasta kuehniella was investigated. The results from experiments designed to assess the effect of P. tritici on cohorts of A. kuehniella of different ages were not significant. They suggested that moth larvae were most severely affected if physogastric P. tritici females were introduced 10
The seasonal abundance of spider mites and their predator Neoseiulus fallacis (Garman) (Acari: Ph... more The seasonal abundance of spider mites and their predator Neoseiulus fallacis (Garman) (Acari: Phytoseiidae) was determined during three consecutive years in Washington State red raspberry fields. Tetranychus urticae Koch (Acari: Tetranychidae), Eotetranychus carpini borealis (Ewing) (Acari: Tetranychidae), and N. fallacis were commonly found in Skagit and Whatcom Counties. E. carpini borealis colonized the fruiting canes earlier in the season than T. urticae. The two phytophages overlapped in midseason, but T. urticae entered diapause earlier than E. carpini borealis and N. fallacis. Densities of N. fallacis increased with increase in spider mite densities. However, the numerical response of the predator was more evident for T. urticae than for E. carpini borealis. Nevertheless, the predator was spatially associated with the two prey species. The spatial and seasonal distribution of N. fallacis in relationship to host plant phenology and prey distribution may influence the effectiv...
Competitive interactions between Tetranychus urticae and Eotetranychus carpini borealis were inve... more Competitive interactions between Tetranychus urticae and Eotetranychus carpini borealis were investigated under laboratory and greenhouse conditions. When placed first to colonize red raspberry leaves, T. urticae caused extinction of E. carpini borealis populations. E. carpini borealis had detrimental effects on T. urticae but did not cause T. urticae population extinction. The area used by E. carpini borealis for egg deposition decreased with an increase in the number of T. urticae eggs. Red raspberry showed an induced response to T. urticae and E. carpini borealis feeding after two weeks of infestation. Population growth of each species was reduced on plants that were previously infested by conspecifics but inducible response by one species had no effects on the other species.
Page 1. Flight Response of Aphytis melinus (Hymenoptera: Aphelinidae) and Scirtothrips citri (Thy... more Page 1. Flight Response of Aphytis melinus (Hymenoptera: Aphelinidae) and Scirtothrips citri (Thysanoptera: Thripidae) to Trap Color, Size, and Shape1 DANIEL S. MORENO, WILLIAM A. GREGORY,2 ANDLYNELL K. TANIGOSHI ...
Annals of the Entomological Society of America, 1978
... Comprehensive life tables for the phytoseiid pred-ator, Metaseiulus ocddentalis (Nesbitt), an... more ... Comprehensive life tables for the phytoseiid pred-ator, Metaseiulus ocddentalis (Nesbitt), and the McDaniel spider mite, Tetranychus mcdanieli Mc ... Hoyt's (1969a) comprehensive researches on mite populations in an integrated apple pest program sug-gested that T. mcdanieli ...
Annals of the Entomological Society of America, 1975
... DISCUSSION This study supports the hypothesis that during the growing season temperatures in ... more ... DISCUSSION This study supports the hypothesis that during the growing season temperatures in the intermontane river valleys of the Pacific Northwest are favorable to T. mcdanieli (Webster 1948, Nielsen 1958, Hoyt 1969b). ...
Annals of the Entomological Society of America, 1976
... Ann. Entomol. Soc. Am. 63: 1385-9. Hoyt, SC 1969. Population studies of five mite spe-cies on... more ... Ann. Entomol. Soc. Am. 63: 1385-9. Hoyt, SC 1969. Population studies of five mite spe-cies on apple in Washington. Proc. 2nd Int. Congr. ... Mushi 40: 47-65. Nielsen, GL 1958. Biology of theMcDaniel mite, Tetranychus mcdanicli McGregor in Utah. J. Econ. Entomol. 51: 588-92. ...
Experimental and Applied Acarology - EXP APPL ACAROL, 1993
The nutritional effects of pollen from cassava, oil palm, castor bean, Leucaena leucocephala and ... more The nutritional effects of pollen from cassava, oil palm, castor bean, Leucaena leucocephala and a phloem exudate from cassava were tested in the laboratory for their effect on survivorship and oviposition of Amblyseius idaeus (Denmark & Muma). Survival and longevity of even-aged females were enhanced on the aforementioned non-prey diets when compared with the control of no food. Castor bean pollen provided sufficient nutrition to induce an irregular and low ovipositional rate of A. idaeus over a five week interval. Oviposition ceased after 48 h in the presence of the other non-prey foods or free-water only. These studies suggest that A. idaeus is capable of switching or supplementing its diet with non-prey foods during periods when spider mite populations are low.
General biology, seasonal flight numbers and ovipositional data were gathered to understand the p... more General biology, seasonal flight numbers and ovipositional data were gathered to understand the phenology of the cherry bark tortrix, Enarmonia formosana Scopoli in Seattle, WA. Pheromone trapping during 2001 and 2002 showed a continuous flight period from May to September. During this time the greatest abundance of adults occurred during July and August. The combined seasonal egg data and larval
Strategies targeting the biological control of the cherry bark tortrix (=CBT), Enarmonia formosan... more Strategies targeting the biological control of the cherry bark tortrix (=CBT), Enarmonia formosana (Scopoli) in North America have also included the search for potentially useful native hymenopterous parasitoids of the pest in Europe. The search for such agents undertaken in the central-east Europe (Czech Republic, Slovak Republic, Hungary) resulted in determination of several ichneumonid species (Campoplex cf. dubitator Horst., Liotryphon
Distribution of the cherry bark tortrix, Enarmonia formosana (Scopoli) (=CBT) was determined by d... more Distribution of the cherry bark tortrix, Enarmonia formosana (Scopoli) (=CBT) was determined by detecting the presence of their frass tubes on the trunk of rosaceous shrubs and trees throughout the Czech Republic. Tree disjunctive areas of CBT were indicated in the country. The overall distribution of CBT approximates the annual isothermes 8ā9Ā°C and 10ā11Ā°C, but a number of zonal exceptions
ABSTRACT The Carpathian Basin has been classified as one of the model areas of Russian wheat aphi... more ABSTRACT The Carpathian Basin has been classified as one of the model areas of Russian wheat aphid (= RWA), Diuraphis noxia (Kurdj.), expansion from the southeast to Central Europe. Explorations in 2002 as well as the summarized information published earlier centered the evidence for RWA in the northern and northeastern parts of the area and its occurrence was detected and verified in the area up to the submountains of the Carpathian Mountain Range. The history and distribution peculiarities of RWA in the Carpathian Basin and area are reviewed and discussed.
The feasibility of utilizing Pyemotes tritici as a biological control agent against the Mediterra... more The feasibility of utilizing Pyemotes tritici as a biological control agent against the Mediterranean flour moth, Anagasta kuehniella was investigated. The results from experiments designed to assess the effect of P. tritici on cohorts of A. kuehniella of different ages were not significant. They suggested that moth larvae were most severely affected if physogastric P. tritici females were introduced 10
The seasonal abundance of spider mites and their predator Neoseiulus fallacis (Garman) (Acari: Ph... more The seasonal abundance of spider mites and their predator Neoseiulus fallacis (Garman) (Acari: Phytoseiidae) was determined during three consecutive years in Washington State red raspberry fields. Tetranychus urticae Koch (Acari: Tetranychidae), Eotetranychus carpini borealis (Ewing) (Acari: Tetranychidae), and N. fallacis were commonly found in Skagit and Whatcom Counties. E. carpini borealis colonized the fruiting canes earlier in the season than T. urticae. The two phytophages overlapped in midseason, but T. urticae entered diapause earlier than E. carpini borealis and N. fallacis. Densities of N. fallacis increased with increase in spider mite densities. However, the numerical response of the predator was more evident for T. urticae than for E. carpini borealis. Nevertheless, the predator was spatially associated with the two prey species. The spatial and seasonal distribution of N. fallacis in relationship to host plant phenology and prey distribution may influence the effectiv...
Competitive interactions between Tetranychus urticae and Eotetranychus carpini borealis were inve... more Competitive interactions between Tetranychus urticae and Eotetranychus carpini borealis were investigated under laboratory and greenhouse conditions. When placed first to colonize red raspberry leaves, T. urticae caused extinction of E. carpini borealis populations. E. carpini borealis had detrimental effects on T. urticae but did not cause T. urticae population extinction. The area used by E. carpini borealis for egg deposition decreased with an increase in the number of T. urticae eggs. Red raspberry showed an induced response to T. urticae and E. carpini borealis feeding after two weeks of infestation. Population growth of each species was reduced on plants that were previously infested by conspecifics but inducible response by one species had no effects on the other species.
Page 1. Flight Response of Aphytis melinus (Hymenoptera: Aphelinidae) and Scirtothrips citri (Thy... more Page 1. Flight Response of Aphytis melinus (Hymenoptera: Aphelinidae) and Scirtothrips citri (Thysanoptera: Thripidae) to Trap Color, Size, and Shape1 DANIEL S. MORENO, WILLIAM A. GREGORY,2 ANDLYNELL K. TANIGOSHI ...
Annals of the Entomological Society of America, 1978
... Comprehensive life tables for the phytoseiid pred-ator, Metaseiulus ocddentalis (Nesbitt), an... more ... Comprehensive life tables for the phytoseiid pred-ator, Metaseiulus ocddentalis (Nesbitt), and the McDaniel spider mite, Tetranychus mcdanieli Mc ... Hoyt's (1969a) comprehensive researches on mite populations in an integrated apple pest program sug-gested that T. mcdanieli ...
Annals of the Entomological Society of America, 1975
... DISCUSSION This study supports the hypothesis that during the growing season temperatures in ... more ... DISCUSSION This study supports the hypothesis that during the growing season temperatures in the intermontane river valleys of the Pacific Northwest are favorable to T. mcdanieli (Webster 1948, Nielsen 1958, Hoyt 1969b). ...
Annals of the Entomological Society of America, 1976
... Ann. Entomol. Soc. Am. 63: 1385-9. Hoyt, SC 1969. Population studies of five mite spe-cies on... more ... Ann. Entomol. Soc. Am. 63: 1385-9. Hoyt, SC 1969. Population studies of five mite spe-cies on apple in Washington. Proc. 2nd Int. Congr. ... Mushi 40: 47-65. Nielsen, GL 1958. Biology of theMcDaniel mite, Tetranychus mcdanicli McGregor in Utah. J. Econ. Entomol. 51: 588-92. ...
Experimental and Applied Acarology - EXP APPL ACAROL, 1993
The nutritional effects of pollen from cassava, oil palm, castor bean, Leucaena leucocephala and ... more The nutritional effects of pollen from cassava, oil palm, castor bean, Leucaena leucocephala and a phloem exudate from cassava were tested in the laboratory for their effect on survivorship and oviposition of Amblyseius idaeus (Denmark & Muma). Survival and longevity of even-aged females were enhanced on the aforementioned non-prey diets when compared with the control of no food. Castor bean pollen provided sufficient nutrition to induce an irregular and low ovipositional rate of A. idaeus over a five week interval. Oviposition ceased after 48 h in the presence of the other non-prey foods or free-water only. These studies suggest that A. idaeus is capable of switching or supplementing its diet with non-prey foods during periods when spider mite populations are low.
General biology, seasonal flight numbers and ovipositional data were gathered to understand the p... more General biology, seasonal flight numbers and ovipositional data were gathered to understand the phenology of the cherry bark tortrix, Enarmonia formosana Scopoli in Seattle, WA. Pheromone trapping during 2001 and 2002 showed a continuous flight period from May to September. During this time the greatest abundance of adults occurred during July and August. The combined seasonal egg data and larval
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