Diseases of economic plants (1921) Diseases of economic plants diseasesofeconom01stev Year: 1921 General Diseases 25 Truck crops: asparagus, bean, carrot, celery, cucumber, eggplant, garden beet, garden pea, Irish potato, lettuce, muskmelon, okra, onion, pepper, salsify, spinach, straw- berry, tomato. Woody plants: almond, catalpa, cherry, European elm, fig. Old World grapevine, mulberry, peach, pecan, Persian walnut, weeping willow. Fig. 6. — Root-knot (nematode) on salsify. Original. In limited areas soil disinfection (p. 460) may be em- ployed. Thorough cultivation and fertilization in
Diseases of economic plants (1921) Diseases of economic plants diseasesofeconom01stev Year: 1921 General Diseases 25 Truck crops: asparagus, bean, carrot, celery, cucumber, eggplant, garden beet, garden pea, Irish potato, lettuce, muskmelon, okra, onion, pepper, salsify, spinach, straw- berry, tomato. Woody plants: almond, catalpa, cherry, European elm, fig. Old World grapevine, mulberry, peach, pecan, Persian walnut, weeping willow. Fig. 6. — Root-knot (nematode) on salsify. Original. In limited areas soil disinfection (p. 460) may be em- ployed. Thorough cultivation and fertilization induces the roots of perennials to extend deeper into the soil, thus reach- ing below the nematode zone, affording at least temporary alleviation. Three years of rotation with non-susceptible crops as corn, timothy, red-top, velvet beans, resistant cowpeas, barley, winter rye, or oats with care to keep down susceptible weeds largely reduces the amount of soil infection.
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