Figure 31.1 below depicts the outline of a large fairy ring that has appeared overnight in an open meadow, as viewed from above. The fairy ring represents the furthest advance of this mycelium through the soil. Locations A-D are all 0.5 meters below the soil surface. Responses may be used once, more than once, or not at all.

-When pathogenic fungi are found growing on the roots of grape vines, grape farmers sometimes respond by covering the ground around their vines with plastic sheeting and pumping a gaseous fungicide into the soil. The most important concern of grape farmers who engage in this practice should be that the

Question

Figure 31.1 below depicts the outline of a large fairy ring that has appeared overnight in an open meadow, as viewed from above. The fairy ring represents the furthest advance of this mycelium through the soil. Locations A-D are all 0.5 meters below the soil surface. Responses may be used once, more than once, or not at all.

-When pathogenic fungi are found growing on the roots of grape vines, grape farmers sometimes respond by covering the ground around their vines with plastic sheeting and pumping a gaseous fungicide into the soil. The most important concern of grape farmers who engage in this practice should be that the

Quizplus · Accepted Answer

Grape vines rely on mycorrhizal associations with the soil fungi in order to absorb nutrients from the soil. If the fungicide also kills the mycorrhizae, it could harm the grapevines and reduce their yield. Farmers should be careful to use fungicides that do not harm beneficial soil organisms like mycorrhizae. The other answer choices (A, B, C, and E) are not as important as preserving the relationship between the grapevines and soil fungi.

Figure 311 Below Depicts the Outline of a Large Fairy Ring