{'fraction_non_alphanumeric': 0.02780117944397641, 'fraction_numerical': 0.012636899747262006, 'mean_word_length': 4.351351351351352, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Infection of the stem and large roots of Eucalyptus marginata by Phytophthora cinnamomi

Field inoculation studies suggest that infection of Eucalyptus marginata Donn. ex. Sm. by Phytophthora cinnamomi Rands is mainly limited to unsuberized feeder roots (1, 2, 6) with infection of large woody roots dependent on host vigour and inoculum potential (2). This mode of E. marginata infection is thought to differ from that of other susceptible species, such as Banksia grandis Willd., where the fungus infects the woody roots and base of the stem (2, 3, 6). In an investigation of the sudden death of an E. marginata tree, the stem just below the soil surface and large roots were found to be extensively infected with P. cinnamomi (Figure 1; site 1, Table 1). No P. cinnamomi was recovered from soil at the base of the tree and only one of 37 fine or small roots less than 1 cm diam. was infected with the fungus. This preliminary survey was therefore initiated to determine the frequency and extent of infection of the stem and large roots of E. marginata by P. cinnamomi. Dead trees with the leaves still retained were sampled at seven sites within a 30 km radius of Dwellingup in August