Occurrence of common milkweed (Asclepias syriaca) in cropland and adjacent areas
نویسندگان
چکیده
منابع مشابه
Reduction in common milkweed (Asclepias syriaca) occurrence in Iowa cropland from 1999 to 2009
The role of common milkweed in the lifecycle of the monarch butterfly has increased interest in the presence of this weed in the north central United States. An initial survey conducted in 1999 found that low densities of common milkweed occurred in approximately 50% of Iowa corn and soybean fields. In 2009, common milkweed was present in only 8% of surveyed fields, and the area within infested...
متن کاملCoexistence of three specialist aphids on common milkweed, Asclepias syriaca.
Coexistence of host-specific herbivores on plants is believed to be governed by interspecific interactions, but few empirical studies have systematically unraveled these dynamics. We investigated the role of several factors in promoting coexistence among the aphids Aphis nerii, Aphis asclepiadis, and Myzocallis asclepiadis that all specialize on common milkweed (Asclepias syriaca). Competitive ...
متن کاملIsolation and characterization of microsatellite loci in the common milkweed, Asclepias syriaca (Apocynaceae).
PREMISE OF THE STUDY Microsatellite primers were developed for the common milkweed, Asclepias syriaca L., to assist in genet identification and the analysis of spatial genetic structure. METHODS AND RESULTS Using an enrichment cloning protocol, eight microsatellite loci were isolated and characterized in a Michigan population of A. syriaca. The primers amplified di- and trinucleotide repeats ...
متن کاملNatural selection on common milkweed (Asclepias syriaca) by a community of specialized insect herbivores
Hypothesis: Genetic variation in plant defence structures a community of herbivores and ultimately mediates co-evolution. Organisms: Common milkweed (Asclepias syriaca) and five natural insect herbivores (seed bug, leaf mining fly, monarch caterpillar and two beetles). Methods: Quantitative genetic field experiment over 2 years, genetic selection analyses, and measurement of five defensive trai...
متن کاملTests of the coupled expression of latex and cardenolide plant defense in common milkweed (Asclepias syriaca)
The coexpression of plant resistance traits suggests the hypothesis that they may have complementary functions in defense against herbivory. To address the extent to which defensive traits are necessarily coupled in plants grown under various conditions, we focused on latex and cardenolides, two potent defenses of milkweeds. We measured defenses across ontogenetic stages, different biotic and a...
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ژورنال
عنوان ژورنال: Crop Protection
سال: 2000
ISSN: 0261-2194
DOI: 10.1016/s0261-2194(00)00024-7