{'fraction_non_alphanumeric': 0.042884990253411304, 'fraction_numerical': 0.03898635477582846, 'mean_word_length': 5.041176470588235, '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}}
Biology, Distribution, and Field Host Plants of Macroplea japana in China: An Unsuitable Candidate for Biological Control of Hydrilla verticillata

Hy drillo, verticillata (L.f.) Royle (Hydrocharitaceae), a submersed aquatic macrophyte, is native to Asia, Australia, Europe, and Africa (Buckingham & Bennett 1996). This invasive species was first introduced to North America in the early 1950s in the Tampa Bay area (Schmitz et al. 1991) and dispersed rapidly to become one of the worst aquatic weeds in the US (Balciunas et al. 2002). Hydrilla is controlled mainly with chemical herbicides (Fox et al. 1996). However, both mechanical removal (Serafy et al. 1994) and biological control agents (Wheeler & Center 2001) play some role. Since the discovery of herbicide resistance in hydrilla populations in Florida (Michel et al. 2004), biological control has become a high priority. Foreign exploration for classical biological control agents of hydrilla was conducted in China between 1989 and 1995 and resulted in the discov-