| apple juice composition: sugar, nonvolatile acid, and phenolic profiles. | apples from michigan, washington, argentina, mexico, and new zealand were processed into juice; the 8 samples included golden delicious, jonathan, granny smith, and mcintosh varieties. liquid chromatography was used for quantitation of sugars (glucose, fructose, sucrose, and sorbitol), nonvolatile acids (malic, quinic, citric, shikimic, and fumaric), and phenolics (chlorogenic acid and hydroxymethylfurfural [hmf]). other determinations included ph, 0brix, and l-malic acid. a number of compositio ... | 2015 | 3417603 |
| identification of host fruit volatiles from snowberry (symphoricarpos albus), attractive to rhagoletis zephyria flies from the western united states. | a mixture of behaviorally active volatiles was identified from the fruit of snowberry, symphoricarpos albus laevigatus, for rhagoletis zephyria flies reared from snowberry fruit. a nine-component blend containing 3-methylbutan-1-ol (3%), dimethyl trisulfide (1%), 1-octen-3-ol (40%), myrcene (8%), nonanal (9%), linalool (13%), (3e)-4,8-dimethyl-1,3,7-nonatriene (dmnt, 6%), decanal (15%), and β-caryophyllene (5%) was identified that gave consistent electroantennogram activity and was behaviorally ... | 2017 | 28078623 |
| abundance of apple maggot, rhagoletis pomonella, across different areas in central washington, with special reference to black-fruited hawthorns. | the apple maggot fly, rhagoletis pomonella (walsh) (diptera: tephritidae), infests non-commercial apple (malus domestica (borkh.) borkh.) and native black-fruited hawthorns (mostly crataegus douglasii lindl.) in central washington, but little has been published on the abundance of the fly in this region. in this paper, the abundance of r. pomonella across different sites near apple-growing areas in central washington is documented in order to assess the threat of the fly to commercial apple orch ... | 2012 | 23451979 |
| enumeration of bacterial and yeast colonists of apple fruits and identification of epiphytic yeasts on pear fruits in the pacific northwest united states. | a procedure for the isolation of diverse culturable microflora for the estimation of the population size of yeasts and bacteria on the surface of pome fruits is described. maximum numbers of morphologically distinct colonies of both yeasts and bacteria were recovered from apple fruit surfaces when fruits were shaken for 5 min in sterile phosphate buffer plus tween, sonicated for 5 min, and aliquots of the buffer plated onto diluted yeast malt agar and diluted nutrient broth agar, respectively. t ... | 1996 | 9022303 |
| releases of insectary-reared galendromus occidentalis (acari: phytoseiidae) in commercial apple orchards. | galendromus occidentalis (nesbitt) is one of several phytoseiid species that are available for purchase to supplement endemic predator populations that are not providing sufficient control of spider mites. we performed a series of releases of commercially reared g. occidentalis in commercial apple (malus domestica borkhausen) orchards in washington from 2010 to 2012. releases of up to 50,000 mites per acre did not lead to an increase in populations of predatory mites or to a decrease in populati ... | 2013 | 24224240 |
| adjusting the phenology model of codling moth (lepidoptera: tortricidae) in washington state apple orchards. | studies were conducted with codling moth, cydia pomonella l., to fit cumulative curves for the occurrence of injured fruits and male moth catches in sex pheromone-baited traps as a function of accumulated degree-days after the start of moth flight. twelve data sets were collected from seven apple, malus domestica bordhausen, orchards in washington state from 2003 to 2006. cumulative data were grouped across years for orchards either treated with sex pheromone dispensers or untreated and fit to l ... | 2007 | 18284777 |
| a field test for host fruit odour discrimination and avoidance behaviour for rhagoletis pomonella flies in the western united states. | prezygotic isolation due to habitat choice is important to many models of speciation-with-gene-flow. habitat choice is usually thought to occur through positive preferences of organisms for particular environments. however, avoidance of non-natal environments may also play a role in choice and have repercussions for post-zygotic isolation that preference does not. the recent host shift of rhagoletis pomonella (diptera: tephritidae) from downy hawthorn, crataegus mollis, to introduced apple, malu ... | 2012 | 22435643 |