| 31. | Chemical controls can include a variety of compounds.
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| 32. | Chemical control is an option for practitioners who need to maintain high quality, visually pleasing turfgrass.
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| 33. | Chemical control of the invasive plants, along with reintroduction of native species, have had some success.
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| 34. | Chemical control of ground cover is advised.
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| 35. | Using cultural control before chemical control can reduce detrimental effects to the ecosystem surrounding the growing environment.
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| 36. | The aster yellows index ( AYI ) can be used to determine when to apply chemical controls.
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| 37. | The disease is controlled mainly through genetic resistance, chemical control, crop rotation, and strategic timing of planting.
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| 38. | Chemical control of toadflax can be difficult.
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| 39. | Chemical control of the pest is difficult.
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| 40. | It reduces the spread of the plants in areas where mechanical and chemical control is not practical.
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