Plant Catalog

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Organic and Low-Spray Peach Production

This publication describes the major diseases and insect pests of peaches and discusses organic or least-toxic control options for each. It emphasizes the considerable climatic differences between the arid West, which is relatively amenable to organic peach production, and the humid East, where it is very difficult to grow peaches without synthetic fungicides and insecticides. It profiles a successful organic peach grower in California, discusses new-generation synthetic pesticides, and introduces a model reduced-spray program for the East. The last section lists additional references, publications, and electronic information sites.

Steve Diver
Tracy Mumma
ATTRA - National Sustainable Agriculture Information Service
Plant Catalog
Some Quality Components of Four Chia (Salvia hispanica L.) Genotypes Grown under Tropical Coastal Desert Ecosystem Conditions

A chia (Salvia hispanica L.) trial in the Santa Elena Peninsula of Ecuador consisted of 4 genotypes (Tzotzol, Iztac 1, Iztac 2 and Miztic) sown on January 15, 2007 in replicated plots to assess production and composition. Seed yield was affected by genotype, with Miztic and Tzotzol producing significantly (p<0.05) greater yields than the Iztac II genotype, but not more than Iztac I which was not significantly (p<0.05) different from Iztac II. Iztac II had the highest protein content (24.43%), however the difference was significantly (p<0.05) different only from Iztac I. Neither Iztac II nor Iztac I were significantly (p<0.05) different from either the Tzotzol or Miztic genotypes. No significant difference (p<0.05) in lipid content was found among genotypes. Miztic and Iztac II, with 20.23% and 20.03%, respectively had significantly (p<0.05) higher linoleic fatty acid percentages than the 19.23% of the Iztac I genotype. Iztac I had the highest α-linolenic fatty acid percentage (61.73) and this was significantly (p<0.05) different than the 58.37% found for the Iztac II genotype. All of the genotypes showed a similar relationship among compounds, that being caffeic acid>chlorogenic acid> quercetin>kaempherol. In summary, the effect of genotype was more evident on seed yield than protein content, oil content, fatty acid composition and phenolic compounds, hence yield needs to be the main factor when considering establishment of chia as a crop in the area.

R. Ayerza
W. Coates
Asian Journal of Plant Sciences
Plant Catalog
Pawpaw - A "Tropical" Fruit for Temperate Climates

This publication is intended as a summary overview of pawpaw (or paw paw) production, including overall culture, pests, harvest, post-harvest, marketing, and research which seeks to develop the pawpaw’s potential for commercial development.
The pawpaw (Asimina triloba) has great potential for commercial development. Though the pawpaw’s only near relatives are tropical and the pawpaw looks like a mango and tastes like a banana, it is not tropical but is native to most of the eastern U.S. and even into Canada. The pawpaw grows best in areas with hot summers and cold winters (USDA Zones 5-8). It is hardy and relatively pest-free, and its tolerance to shade makes it suitable for intercropping with other trees. In addition, the pawpaw has genetic variability that can be used to improve the plant.

Guy Ames
Lane Greer
ATTRA - National Sustainable Agriculture Information Service
Plant Catalog