scholarly journals Intensive Early Season Adulticide Applications Decrease Arbovirus Transmission Throughout the Coachella Valley, Riverside County, California

2008 ◽  
Vol 8 (4) ◽  
pp. 475-490 ◽  
Author(s):  
Hugh D. Lothrop ◽  
Branka B. Lothrop ◽  
Donald E. Gomsi ◽  
William K. Reisen
Keyword(s):  
Early Season ◽  
Coachella Valley ◽  
Riverside County

scholarly journals First Report of Wood Canker Caused by Neoscytalidium dimidiatum on Grapevine in California

Plant Disease ◽  
2013 ◽  
Vol 97 (11) ◽  
pp. 1511-1511 ◽  
Author(s):  
P. E. Rolshausen ◽  
D. S. Akgül ◽  
R. Perez ◽  
A. Eskalen ◽  
C. Gispert
Keyword(s):  
Dna Sequences ◽  
Morphological Characteristics ◽  
Table Grape ◽  
Sequence Comparisons ◽  
Coachella Valley ◽  
Riverside County ◽  
Neoscytalidium Dimidiatum ◽  
Shoot Blight ◽  
Sterile Medium ◽  
Pathogenicity Tests

In May 2012 in the Coachella valley, Riverside County, California, the decline of vines in table grape (Vitis vinifera) vineyards was observed. Foliar symptoms consisted of shoot blight with wilting and necrosis of leaves and drying and shriveling of berries. In some cases, the entire vine collapsed in the middle of the growing season (apoplexia). Wood cankers in the spurs, cordons, and trunks of affected vines were also present. The nine isolates recovered from the cankers were identified as Neoscytalidium dimidiatum (Penz.) Crous & Slippers based on morphological characteristics and DNA sequence comparisons. Two isolates were grown on potato dextrose agar (PDA) medium and a total of 50 conidia were measured per isolate. Conidia were ellipsoid to ovoid, with a truncate base and an acutely rounded apex, initially aseptate, becoming brown and two-celled at maturity, 7.2 ± 1.2 μm × 3.8 ± 0.4 μm. The rDNA internal transcribed spacer (ITS), and β-tubulin (BT) loci were amplified using primer pairs and methods previously described (4). A total of five isolates were sequenced. The DNA sequences of one N. dimidiatum grapevine isolate (UCR-Neo1) were deposited in the GenBank database (ITS, KC937066; BT, KC937067). Pathogenicity tests were performed by inoculating 12 grape cuttings cv. Thompson Seedless with isolate UCR-Neo1 and 12 control cuttings with sterile medium using a technique previously described (1). The experiment was repeated twice. After 20 weeks of incubation period in the greenhouse, the lesions length produced by N. dimidiatum averaged 13.5 mm and was significantly longer (P < 0.05) from the control (average 3 mm). N. dimidiatum was reisolated from all the inoculated plants and identified by colony morphology. The incidence of N. dimidiatum in table grape vineyards of the Coachella valley has been estimated at 15%, with nine vines infected out of 60 vines total. This pathogen has been identified in California in walnut nursery causing the death of trees due to the development of canker at the graft union (2). N. dimidiatum has also been identified as the causal agent of shoot blight, canker, and gummosis on citrus in Italy (3). The crop is also being grown in the Coachella valley and these findings warrant further investigation in order to determine the host range, distribution, and incidence of this pathogen in the area. References: (1) K. Baumgartner et al. Plant Dis. 97:912, 2013. (2) S. F. Chen et al. Plant Dis. 97:993, 2013. (3) G. Polizzi et al. Plant Dis 93:1215, 2009. (4) J. R. Urbez-Torres et al. Plant Dis. 92:519, 2008.

scholarly journals Microbial contamination of drinking water from vending machines of Eastern Coachella Valley

2020 ◽  
Author(s):  
Thomas D. Hile ◽  
Stephen G. Dunbar ◽  
Ryan G. Sinclair
Keyword(s):  
Drinking Water ◽  
Environmental Protection Agency ◽  
Tap Water ◽  
Genetic Material ◽  
Measured Temperature ◽  
Salmonella Spp ◽  
Total Coliforms ◽  
Coachella Valley ◽  
Riverside County ◽  
Vending Machines

Abstract Drinking water quality from sources other than tap water is increasingly becoming a source of concern in many communities. Communities in the Eastern Coachella Valley (ECV), Riverside County, California, USA have raised concerns regarding bulk drinking water from water vending machines (WVMs) found in public vendors. To address concerns, we conducted microbiological contamination assessments of drinking water from WVMs in the ECV using heterotrophic plate counts (HPC), the presence of total coliforms using IDEXX technology, and real time PCR (qPCR). We also measured temperature, pH, electrical conductivity, and free chlorine concentration. Twenty-five WVMs were sampled by using positively charged NanoCeram® filters in the field. Results indicated 32% of WVMs had total coliforms, and 21% had HPC above Environmental Protection Agency (EPA) requirements. Through qPCR, we found 81% of WVMs had Salmonella spp, Listeria monocytogenes, and Campylobacter jejuni, 76% had Enterococcus faecalis, and 90% had Pseudomonas aeruginosa. Results indicated most WVM samples we collected contained genetic material of pathogenic microorganisms and therefore, did not meet EPA drinking water standards. There is an urgency to enforce WVM maintenance through drain flushing, spigot cleaning, rust removal, filter replacement, and limits to physico-chemical parameters.

The “Ancient Stone Fish Traps” of the Coachella Valley, Southern California

1945 ◽  
Vol 10 (3) ◽  
pp. 285-294 ◽  
Author(s):  
Adan E. Treganza
Keyword(s):  
High Water ◽  
Salton Sea ◽  
Ancient Lake ◽  
The West ◽  
Coachella Valley ◽  
Riverside County ◽  
Fish Traps ◽  
Small Stone ◽  
Talus Slope ◽  
Lake Cahuilla

A group of small stone enclosures, supposed by some to be of natural origin and by others to be the works of man, lies on a rocky travertine-encrtfsted talus slope at the base of the Santa Rosa Mountains on the west side of the Coachella Valley in Riverside County, California. These phenomena are known locally as the "Ancient Fish Traps." They occupy a series of rocky terraces some 90 feet below the maximum high-water shore line of Ancient Lake Cahuilla (called by some Blake Sea), whose basin is now partly occupied by the Salton Sea. The “traps” consist of 85 to 100 bowl-like depressions composed of a travertine-encrusted granite talus debris. They are arranged in three rows, each of which follows the exact contour of one of the old recessional terraces of the lake (Pl. XIX).

Early season weed control in onions

1982 ◽  
Vol 35 ◽  
pp. 304-307
Author(s):  
J.J.C. Scheffer ◽  
G.J. Wilson
Keyword(s):  
Weed Control ◽  
Early Season

Molecular breeding of fragrant early-season hybrid rice using the BADH2 gene

2019 ◽  
Vol 51 (6) ◽  
Author(s):  
Zhonghua Sheng ◽  
Sajid Fiaz ◽  
Qianlong Li ◽  
Wei Chen ◽  
Xiangjin Wei ◽  
...  
Keyword(s):  
Molecular Breeding ◽  
Hybrid Rice ◽  
Early Season ◽  
Badh2 Gene
Sign in / Sign up

Export Citation Format

Share Document