Lab 10

• Puccinia graminis f.sp tritici (wheat)
• f.sp avenea oats
• f.sp secalis rye

• destruction of leaf area
• increases the evaporative water loss due  to breakage of the epidermis and cuticle of the plant

• mostly disease resistant cultivars
• eradicating barberry
• systemic fungicides

• It is heteroecious
• macrocyclic
• overwinters as teliospores

Gymnosporangium juniperi-virginianae

• demicyclic
• heteroecious
• biennial disease cycle (takes two years for completion)
• survives has a dikaryotic mycelium in woody galls on junipers during its second year.

from orange gelatinious tendrils that exude from woody galls in the spring during wet weather

• from rostelia (light colored tendril like structures)
• they are wind disseminated and infect the needles of junipers in the summer

• separating apples trees from junipers by more than a quarter mile
• growing disease resistant apple varieties
• applying foliar fungicide