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Characterization of the natural enemy community attacking cotton aphid in the bt cotton ecosystem in northern china

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Academic year: 2021

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Table 1. Repeated measures ANOVA (at 95% confidence intervals) results for the effects of blocks, cages, sampling dates and combination of cages and dates on the population density of cotton aphid in cotton cages field study during 2011, 2012 and 2013
Table 2. Total counts of natural enemies (per 100 plants) observed in the open cotton field surveys during the growing season of 2011, 2012 and 2013 at Langfang experimental station (Yellow River Region of China)
Table 3. Seasonal mean population density of cotton aphids, predators (coccinellids, chrysopids, anthocorids, spiders) and aphid parasitoids during 2011, 2012 and 2013 at Langfang experimental station (Yellow River Region of China)
Figure 4. Mean population dynamics ( ± SEM) of (a) anthocorids and (b) spiders per 100 plants surveyed during three cotton growth stages {Early plant stage (May-June), Middle plant stage (July) and Late plant stage (August- September)} from end of May

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