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Temperature-Dependent Development, Survival, And Potential Distribution Of Ischnodemus Variegatus (Hemiptera: Blissidae), A Herbivore Of West Indian Marsh Grass, Rodrigo Diaz, William A. Overholt, J. P. Cuda, Paul D. Pratt, Alison Fox
Temperature-Dependent Development, Survival, And Potential Distribution Of Ischnodemus Variegatus (Hemiptera: Blissidae), A Herbivore Of West Indian Marsh Grass, Rodrigo Diaz, William A. Overholt, J. P. Cuda, Paul D. Pratt, Alison Fox
Faculty Publications
The bug Ischnodemus variegatus (Signoret) (Hemiptera: Blissidae) is an adventive herbivore, native to South America that feeds in the invasive grass Hymenachne amplexicaulis (Rudge) Nees (Poaceae). This grass is a problematic weed in Florida and Australia, but it is a highly valued forage in Mexico, Cuba, and Venezuela. We studied the influence of nine constant temperatures (8-38°C) on the developmental time and survival of I. variegatus. Complete egg and nymphal mortality occurred at temperatures ≤20.5°C and at 38°C. Developmental time decreased linearly with temperature until 28-30°C and then increased at 33°C. Mortality of first, second, and third instars was high …
Entomopathogenic Fungal Endophytes, Fernando E. Vega, Francisco Posada, M. Catherine Aime, Monica Pava-Ripoll, Francisco Infante, Stephen A. Rehner
Entomopathogenic Fungal Endophytes, Fernando E. Vega, Francisco Posada, M. Catherine Aime, Monica Pava-Ripoll, Francisco Infante, Stephen A. Rehner
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
Fungal endophytes are quite common in nature and some of them have been shown to have adverse effects against insects, nematodes, and plant pathogens.
Our research program is aimed at using fungal endophytes-mediated plant defense as a novel biological control mechanism against the coffee berry borer, the most devastating pest of coffee throughout the world. A survey of fungal endophytes in coffee plants from Hawaii, Colombia, Mexico, and Puerto Rico has revealed the presence of various genera of fungal entomopathogens, including Acremonium, Beauveria, Cladosporium, Clonostachys, and Paecilomyces. Two of these, B. bassiana and Clonostachys rosea …
New Records For Aceria Anthocoptes (Acari: Eriophyidae) Occurring On Canada Thistle In Colorado, Nebraska, And Wyoming, U.S.A., G. J. Michels Jr., V. A. Carney, J. Lydon, Ronald Ochoa, R. L. Renn
New Records For Aceria Anthocoptes (Acari: Eriophyidae) Occurring On Canada Thistle In Colorado, Nebraska, And Wyoming, U.S.A., G. J. Michels Jr., V. A. Carney, J. Lydon, Ronald Ochoa, R. L. Renn
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
Canada thistle [Cirsium arvense (L.) Scop.] growing in eastern Colorado, Wyoming and western Nebraska were surveyed for the presence and distribution of Aceria anthocoptes (Nal.). Of the 34 sites surveyed in 2004, mites were abundant at 42%, present in lesser numbers at 52%, and not present at 6% of the sites. In 2005, two new sites were added and ten sites sampled in 2004 were revisited. Of these 12 sites, mites were abundant at 17%, present to a lesser extent at 58%, and not present at 25% of the sites. The results demonstrate that Canada thistle growing in this …
Alien Dominance Of The Parasitoid Wasp Community Along An Elevation Gradient On Hawai’I Island, Robert W. Peck, Paul C. Banko, Marla Schwarzfeld, Melody Euaparadorn, Kevin W. Brinck
Alien Dominance Of The Parasitoid Wasp Community Along An Elevation Gradient On Hawai’I Island, Robert W. Peck, Paul C. Banko, Marla Schwarzfeld, Melody Euaparadorn, Kevin W. Brinck
United States Geological Survey: Staff Publications
Through intentional and accidental introduction, more than 100 species of alien Ichneumonidae and Braconidae (Hymenoptera) have become established in the Hawaiian Islands. The extent to which these parasitoid wasps have penetrated native wet forests was investigated over a 1,765 m elevation gradient on windward Hawai’i Island. For [1 year, malaise traps were used to continuously monitor parasitoid abundance and species richness in nine sites over three elevations. A total of 18,996 individuals from 16 subfamilies were collected. Overall, the fauna was dominated by aliens, with 44 of 58 species foreign to the Hawaiian Islands. Ichneumonidae was dominant over Braconidae in …
Biological Control Of Bacterial Spot Disease Of Pepper With Bacillus Strains, Mustafa Mi̇ri̇k, Yeşi̇m Aysan, Özden Çinar
Biological Control Of Bacterial Spot Disease Of Pepper With Bacillus Strains, Mustafa Mi̇ri̇k, Yeşi̇m Aysan, Özden Çinar
Turkish Journal of Agriculture and Forestry
Bacterial spot disease caused by Xanthomonas axonopodis pv. vesicatoria (X. axonopodis pv. vesicatoria) is a devastating pepper (Capsicum annuum) disease in Turkey. Biological control of Xanthomonas axanopodis pv. vesicatoria is of great interest, in terms of environmental safety and economic return. In this study, 3 Bacillus strains isolated from soil samples of the rhizospheres of peppers grown in greenhouses and fields were used to suppress the size of the population of X. axonopodis pv. vesicatoria. Results indicated that disease development decreased by 11%-62% and 38%-67% in pepper plants inoculated with the 3 Bacillus strains alone and in combination, respectively, in …