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Diseases
> Genus
Anguina Scopoli
> Symptoms
Symptoms
Enlargement of the basal
stem part, near the soil base, is the first visible symptom that can be
seen in 20-25 days old seeding. The leaves emerging from such seeding
are twisted and crinkled. Frequently, some leaves are observed to be
folded with their tips held near the growing point. Such as leaves,
however, recover almost too normal, 30 to 45 days after they have
emerged from the growing point.
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The
infected culms either die in the young stage of growth or may grow
until the heading stage. In the latter case, either the emerging
spike is narrow or short with grains partially or completely
replaced by the bacterial mass or it may fail to emerge within the
boot leaf. The stalk is always distorted when such infected ears
show the bacterial infection.
One of the
common observations for the nematode infested wheat plants is that
they are dwarfed, have more tillers and in the initial stages, the
growth rate is comparatively more than the healthy plants". An
evaluation of the gall extract has demonstrated
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that there is
stimulation of the seedlings between 3 and 6 weeks of planting but this
stimulation diminishes with the ageing of the seedlings. The gall
extracts, on analysis, have shown presence of amino acids (aspartic
acid, glutamic acid, glycine serine, tyrosine, alanine, tryptophan,
lysine, nor-leucine, isoleucine, phenylalanine and proline) equivalent
to 8 micromoles of leucine, in one g extract. Sugars equivalent to 42 mg
glucose are also recorded".
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