科研之友
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摘要
Commercially produced maturity group (MC) IV soybeans, Glycine max L, were sampled during bloom for-tarnished plant bugs, Lygus lineolaris (Palisot de Beauvois), during May and June 1999 (3 fields) and 2001 (18 fields). The adults and nymphs were found primarily in single population peaks in both years, indicating a single new generation was produced during each year. The peak mean numbers of nymphs were 0.61 and 084 per drop cloth sample m 1999 and 2001, respectively Adults peaked at 396 (1999) and 376 (2001) per sweep net sample (25 sweeps) Tests using laboratory-reared and field-collected tarnished plant bugs resulted in very poor survival of nymphs 0.16 differ emit soybean varieties (MC III, one, IV, four; V, nine, VI, two). A large cage (0.06 ha) field test found that the number of nymphs produced on eight soybean varieties after mated adults were released into the cages was lower than could be expected on a suitable host These results indicated that soybean was a marginal host for tarnished plant bugs However, the numbers of adults and nymphs found ill the commercially produced fields sampled in the study may have been high enough to cause feeding damage to the flowering soybeans. The nature of the damage and its possible economic importance were not determined. Reproduction of tarnished plant bugs in the commercially produced ear ly soybean fields showed that the early soybeans provided tarnished plant bugs with a very abundant host at a time when only wild hosts were previously available
- 出版日期2010-8
