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"helianthana" - 1 õppematerjal

Sunflower
31
doc

Sunflower

Larva Homoeosoma electellum have dark bands running length of body. Feeds on floral parts, tunnels in Seed. Banded sunflower moth Moth has brown area mid-wing (.5 in.). Larvae are not Cochylis hospes dark striped, smaller than head moth. Makes a small hole in top of seed, feeds on meat. Sunflower bud moth Dark grey moth. Larvae .5 to 1 in. in length. Feeds on Suleima helianthana young stem and head. Headless or damaged heads or large hole on stem near a leaf petiole is symptom. Sunflower midge Small (.1 in.) gnat with tiny (.1 in.) cream-colored larvae Contarinia schulzi laid when head is 1" in diameter. Brown spots at base of individual florets or absence of ray flowers, cupping of heads is symptom.

Ökoloogia → Ökoloogia ja keskkonnakaitse1
17 allalaadimist


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