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Nematode pest of crops : Flower

Nematode pest of Flower crops

Crossandra nematode : Pratylenchus delattrei


  • Stunted parches in field
  • Leaves turn pate yellow with puckering symptom
  • Internodal length reduced to give a rosette  appearance
  • Lesions on the secondary and tertiary roots.


  • Apply carbofuran 3G 1.0 kg a.i/ha
  • Apply FXM @ 10 ton/ha
  • apply neemcake @ 500 kg/ha
  • Helicotylenchus dihystera


Meloidogyne incognita


  • Stunted patches of plants with unthrifty growth
  • Leaves tura pale yellow
  • Reduction of no. of flowers
  • Moderate to severe galling in the roots.


  • Apply carbofuran 3 G @ 1.0 kg a.i/ha
  • Neem cake at 500 kg /ha
  • FYM @ 10 tons/ha.

Chrysanthemum:Ahelenchoides ritzemabosi


  • The first stems to be dwarfed.
  • The plant is forced to produce other basal stems, thus acquiring a bushy appearance. Early nematode feeding in the buds and growing points causes growth retardation, resulting in distorted and deformed leaves.
  • The growing points may be so damaged that they blacken and eventually die.
  • Nematode injury induces the growth of side shoots, which also become infected.
  • Later on, infection of the leaves causes the formation of yellowed spots or
    blotches (Figure 1) that are first noticeable on lower leaf surfaces.
  • The often wedge-shaped discolored areas gradually expand, turn yellowish brown, and finally blacken.
  • Developing leaves become distorted and crinkled.
  • The entire leaf soon becomes infected, shrivels, dies, and hangs downward or falls to the ground.
  • The destruction of the leaves usually progresses upward as the stems elongate.
  • The nematodes may eventually infect the terminal flower buds, producing deformed and undersized flowers.


  • All infected plants and fallen leaves should be carefully removed from the garden or greenhouse and burned.
  • Soil in affected nursery plantings should be fumigated.
  • Floors, benches, and storage areas should be thoroughly cleaned of plant debris. Containers and tools should be steamed or fumigated.
  • Pots, potting soil, and tools must be baked in an oven or steamed at 180-200°F (82- 93°C) for 30 minutes.
  • Foliar nematode diseases can be minimized with good cultural practices.
  • Only carefully selected, nematode-free plants or plant parts should be used for propagation.
  • Excessive humidity, splashing water on stems and leaves, and contact between plants should be avoided.
  • Moisture should not be allowed to stand on the foliage for over a few minutes.
  • The use of a dry surface mulch or a ring of petroleum jelly around the base of stems helps prevent the nematodes from migrating up the plant stems.


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