Research Article
Abiotic Factors Affecting Canola Establishment and Insect Pest Dynamics
Table 3
F values from nonparametric analysis of grouped densities of aphids and thrips on canola plants.
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Canola plants were planted in September and emerged in November. Insect data were collected from December to April in two growing seasons and at two field locations. Aphid counts were divided into three classes (class 0 = plants without aphids (38% of observations), class 1 = 1–15 aphids per plant (32% of observations), and class 2 > 15 aphids per plant (30% of observations)). Thrips data were divided into presence (class = 1; 25% of observations) and absence (class = 0; 75% of observations). *: significant difference at the 0.05 level, **: significant difference at the 0.01 level, and ***: significant difference at the 0.001 level. |