Botany group

Soil layers

THE SMART TOPIC SERIES

Seed Dormancy!

1. What is seed dormancy?

2. What are the causes of seed dormancy?

3. What are the methods for breaking seed dormancy?

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Scientific name some crop family

Agriculture Guidance
Seed Botany

Black knot disease(as pictured in the cherry tree), is a common disease caused by a fungus (Apiosporina morbosa). This disease is common among fruit trees, but mainly attacking plum and cherry trees.

Black knot disease is easily identified by it's hard, uneven black galls that cocoon twigs and branches. The disease is a slow developer and may go unnoticed a season or two.

If left to grow, it effectively strangles new growth, girdling branches and dooming the tree to deterioration and poor fruit production. Insects and plant diseases use the galls as an entry to the tree.

The best time to remove branches with Black Knot disease is late winter.

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Dahlia flower
Family: Asteraceae
Genus: Dahlia

Apple scab is caused by the fungus Venturia inaequalis, it infects crabapples, apples, mountain ash, pear, and Cotoneaster. Scabby fruit is not good for eating; infected leaves turn yellow and fall off early.