Results 21 to 30 of about 3,300 (225)

Damage in Cactaceae, their geographic distribution and new evidences

Botan‪ical Sciences, 2019
Background: Field observations of damage in columnar cacti of central Mexico, and previous evidence in scientific literature, indicated the absence of systematic information about kinds of damage, vectors, and pathogens, in this botanical family ...
David Bravo-Avilez, José Alejandro Zavala-Hurtado, Beatriz Rendón-Aguilar   +2 more
doaj   +1 more source

Cells and Cacti [PDF]

International Mathematics Research Notices, 2015
Let $(W,S)$ be a Coxeter system, let $ $ be a weight function on $S$ and let ${\mathrm{Cact}}\_W$ denote the associated {\it cactus group}. Following an idea of I. Losev, we construct an action of ${\mathrm{Cact}}\_W \times {\mathrm{Cact}}\_W$ on $W$ which has nice properties with respect to the partition of $W$ into left, right or two-sided cells ...
openaire   +2 more sources

Enduring extreme climate: Effects of severe drought on Triatoma brasiliensis populations in wild and man-made habitats of the Caatinga.

PLoS Neglected Tropical Diseases, 2019
BackgroundTriatoma brasiliensis, a triatomine-bug vector of Chagas disease, evolved in the semiarid Caatinga, where it occupies rocky outcrops, shrubby cacti, and human dwellings.
Antonia C Ribeiro, Otília Sarquis, Marli M Lima, Fernando Abad-Franch   +3 more
doaj   +1 more source

Stem rot caused by Fusarium oxysporum f. sp. opuntiarum on Mammillaria painteri in Italy

Phytopathologia Mediterranea, 2020
Potted plants of Mammillaria painteri (Cactaceae) showing symptoms of stem rot were collected from a nursery in Imperia province, Liguria region, Italy.
Domenico BERTETTI, Pietro PENSA, Slavica MATIĆ, Maria Lodovica GULLINO, Angelo GARIBALDI   +4 more
doaj   +1 more source

Reassessment and typification of Opuntia canterae (Opuntioideae, Cactaceae), an endemic prickly pear cactus of Uruguay [PDF]

Plant Ecology and Evolution, 2020
Background and aims – Opuntia is the most widespread genus of Cactaceae, naturally occurring throughout arid and semi-arid areas of the Americas. Many of the species have taxonomic problems resulting from incomplete original descriptions, lack of type ...
Matias Köhler, Lucas Majure
doaj   +3 more sources

On the general sum-connectivity index and general Randić index of cacti

Journal of Inequalities and Applications, 2016
Let G be a connected graph. The degree of a vertex x of G, denoted by d G ( x ) $d_{G}(x)$ , is the number of edges adjacent to x. The general sum-connectivity index is the sum of the weights ( d G ( x ) + d G ( y ) ) α $(d_{G}(x)+d_{G}(y))^{\alpha}$ for
Shehnaz Akhter, Muhammad Imran, Zahid Raza   +2 more
doaj   +1 more source

Differential allelopathy between genders of an invasive dioecious tree on desert plants

Botan‪ical Sciences, 2016
The Peruvian peppertree (Schinus molle) is a dioecious species from South America that was introduced into central Mexico five centuries ago. This tree has invaded abandoned agricultural fields from semiarid regions, where it can be found with several ...
Marcela Avendaño-González, Ernesto I. Badano, Jorge E. Ramírez-Albores, Joel Flores, Jorge A. Flores-Cano   +4 more
doaj   +1 more source