References in periodicals archive ?
Are fruit and seed production in horsenettle populations pollen limited?
The two horsenettle populations used in this investigation were selected because they appeared to represent extremes of horsenettle population density and community composition and physiognomy.
We established a 100-m transect in each field and selected horsenettle plants with flower buds but no open flowers at 2-m intervals along the transect.
Horsenettle density was measured by counting the number of conspecific stems in a 1-[m.
2] quadrat, height of fescue, horsenettle stem height and density of horsenettle stems per [m.
Moreover, pollen limitation occurred in both populations despite their differences in species richness, species composition and the density and size of horsenettle stems, and during a period when conditions were optimal for pollinator activity (warm temperatures and few rainy mornings).
The pollen limitation of fruit and seed set documented in this study could have resulted from either receipt of inadequate amounts of horsenettle pollen or receipt of incompatible pollen.
Globodera tabacum virginiae Miller and Gray, found in the Tidewater region of Virginia, reproduces on tobacco, but is primarily found parasitizing common horsenettle (Solanum carolinense L.