Conifers, a component of beauties of parks and landscapes, are infected with diverse pathogens, especially fungi. In this research, samples were collected from conifers displaying symptoms of disease in parks and landscapes of Rasht in Iran and for the isolation and identification of pathogenic fungi, pieces of infected tissues were placed in PDA and at the next stages in WA, PCA and SNA media ...

Because DNA degradation is mediated by secondary plant products such as phenolic terpenoids, the isolation of high quality DNA from plants containing a high content of polyphenolics has been a difficult problem. We demonstrate an easy extraction process by modifying several existing ones. Using this process we have found it possible to isolate DNAs from four fruit trees, grape (Vitis spp.), app...

To isolate potential insect biocontrol agents, entomogenous nematodes were surveyed in Tennessee plant nurseries in 1991. Soil samples from 113 nursery sites were baited with greater wax moth (Galleria mellonella) larvae, house cricket (Acheta domesticus) adults, lesser mealworm (Alphitobius diaperings) adults, and house fly (Musca domestica) larvae. Heterorhabditis bacteriophora and Steinernem...

A comprehensive introduction research of 41 varieties seven species the genus Juniperus L. was conducted in Pokrovsk, Donetsk region. In course study, some morphological and decorative features these cultivars were analyzed. According to needle coloring, we identified 14 (34% total sample) with green needles, 15 ones (37%) are blue color, 10 (24%) golden-yellow variegated; 2 (5%) silver-gray. s...

     The composition of essential oil of leaves of the male and female shrubs of Juniperus chinensis L. (growing in Isfahan) was analyzed by gas choromatography(GC) and GC-mass spectrometery (MS). The main constituents of leaf oil of the male shrub were: bornyl acetate (26.1%), sabinene (18.3%), trans-sabinyl acetate (11.1%), myrcene (9.2%), lim...