First, the symptoms of damage: also known as Gladiolus leaf spot. The main damage is the leaves, which mostly invade people from the leaf margins, producing purple-red or brown streaks, showing a moiré pattern, and some of the stripes extending from the leaf base upwards to the tip of the leaves, which are extremely harmful. When the humidity is high, the layer of olive hairy mildew can be seen.
Second, the morphological characteristics of pathogens: the pathogen is Cladosporiumcladosporioides (Fresen.) deVries, is a fungus fungus. Conidiophore erect or curved, individual with branching, septate, brown, shallow upward to nearly five colors, stem and base of the stem enlargement into a small ball, stem length 65.3-232 microns, rough 2.7-5. 4 microns. Conidia are born on the spheroids of the stalk and are easily detached. Conidia are elliptic, mostly single-celled, with one end pointed, one end truncated, a few columnar, endogenous oil globules, septa 1-3, size 4.1-21.63.2-5.4 (microns) Some spores have spikes at the base.
Third, the incidence characteristics: the mycelium and conidia overwintering on the sick, when the conditions are suitable for the following year, the resulting conidia first invaded the host's lower leaves, and then gradually expanded, the July-August rainy season, the disease occurred weight.
Fourth, control methods
(1) Spray 1:1:200 times Bordeaux mixture or 20% Runicillus sp. suspension 500 times before onset.
(2) spraying 50% benomyl WP 1000 times or 36% Thiophanate Suspension 500 times, 65% Tamycin wettable powder 1000 times.
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