During a natural field epidemic of curly top virus, accessions within five species of Capsicum were evaluated for resistance. Accessions were considered resistant if 0% to 25% of the individual plants were devoid of curly top virus symptoms. Resistance was found in three accessions each of C. annuum L. and C. frutescens L. and one accession each of C. chacoense Hunz. and C. chinense Jacq. The resistant C. annuum accessions were `Burpee Chiltepin', `NuMex Bailey Piquin', and `NuMex Twilight', while the C. frutescens resistant accessions were USDA-Grif 9322 from Costa Rica, PI 241675 from Ecuador and `Tabasco'. The resistant C. chacoense accession was PI 273419 from Argentina and the C. chinense resistant accession was USDA-Grif 9303 from Colombia.
-season weeds and soil-borne diseases in chile pepper ( Capsicum annuum ) in New Mexico. However, the timing of chile pepper planting in New Mexico (March and April), combined with the need not to plant a cash crop immediately after termination and incorporation
Seedlings of Capsicum annuum L. cv. San Luis were grown in pots containing a pasteurized mixture of sand and sandy loam soil inoculated or noninoculated with the V-A mycorrhizal (VAM) fungus Glomus intraradices Schenck et Smith. Long Ashton nutrient solution (LANS) was modified to supply P at 0, 11 or 44 μg·ml–1. Diurnal gas exchange measurements were taken 15, 30 and 50 days after the experiment was initiated. Plant growth, leaf elemental content, and mycorrhizal development were assessed 52 days after transplanting. Gas exchange and net photosynthesis were enhanced by mycorrhiza and full strength LANS fertilization (44 μg·ml–1). The symbiosis increased leaf nutrient content of P, K, Mg, S, Fe, Mn, Zn, Cu, B, Mo, and Al. Mycorrhizal plants had higher shoot dry weights, leaf number, leaf area, and fruit primordia than nonmycorrhizal plants with P at 0 and 11 μg·ml–1. Root colonization (arbuscules, vesicles, and internal and extraradical hyphae development) were higher with P at 0 and 11 μg·ml–1. The quantity of spores recovered in soil was independent of P treatments.
We thank Drs. R. Craig and C. Quiros for their valuable suggestions to improve the manuscript and Mr. Luis Arriagada for his assistance in collecting. This research was supported with funds from Fondo-SAG of the Servicio Agrícola y Ganadero, Chile.
The Zephyra genus, of the Tecophilaeaceae family, is endemic to Chile’s Atacama Desert ( Muñoz and Moreira, 2000 ) and comprises four species: Z. compacta , Zephyra cyanocrocus , Zephyra elegans , and Zephyra violiflora ( Buerki et al., 2013
Phytophthora blight caused by the oomycete Phytophthora capsici Leon. is a very destructive disease and was first described attacking chile pepper plants in New Mexico ( Leonian, 1922 ). The pathogen produces several disease syndromes: foliar