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  • parasitic
  • While disease may usually be said to result in ultimate injury, there are apparently certain marked exceptions, as in the case of the root tubercles of legumes caused by the attacks of certain nitrogen-fixing parasitic bacteria. (chestofbooks.com)
  • strains
  • Although obvious qualitative differences in disease resistance can be observed when multiple specimens are compared (allowing classification as "resistant" or "susceptible" after infection by the same pathogen strain at similar inoculum levels in similar environments), a gradation of quantitative differences in disease resistance is more typically observed between plant strains or genotypes. (wikipedia.org)
  • wilt
  • Without water, the plants begin to suffer from tomato wilt on sunny days, although they appear to recover at night. (bhg.com)
  • The process of tomato wilt continues until the entire plant is affected. (bhg.com)
  • healthy
  • After trimming diseased plants, pruners and other tools should be cleaned with bleach or alcohol before they are used on healthy plants. (gardenguides.com)
  • Growing healthy, pest- and disease-free tomato plants is relatively simple. (bhg.com)
  • In the spring, when the plants are first starting to grow, prune back dead and diseased canes to make more room for the healthy canes. (gardenguides.com)
  • Moreover, spectral signatures from frond 9 were very discriminatory and at 550-560 nm were able to distinguish plants with early infections from healthy plants. (apsnet.org)
  • rusts
  • In the historical writings of the Hebrews, the Bible, and in the writings of the Greeks and Romans, frequent mention is made of such diseases as rusts, smuts and mildews of grain and canker of trees. (chestofbooks.com)
  • attacks
  • While the reaction of plants to insect attacks in the formation of galls, cankers, and so on, is to be regarded as symptom of disease, the injuries produced by the mere eating away of parts of leaf, stem or fruit are not usually so to be regarded. (chestofbooks.com)
  • leaf
  • Treatment of leaf blotch includes removal of infected parts, application of appropriate fungicide and watering only at the base of the plant. (gardenguides.com)
  • spores
  • In this month's issue of Plant Disease , Thiessen and colleagues report on timing fungicide applications to manage grape powdery mildew based on detection of Erysiphe necator spores in samplers placed in Oregon vineyards. (apsnet.org)
  • growth
  • It can also inhibit normal growth (hypotrophy) or induce excessive abnormal growth (hypertrophy or hyperplasia) in a portion of or throughout an entire plant . (britannica.com)