disease management Flashcards
how can disease be managed
- resistant plants
- health seed and good growing conditions
- cultural practices
- pesticides
- biological control
how is plant resistance caused
some plant varieties are resistant either naturally or through plant breeding
what is the most economical method of disease management
plant variety selection
if a disease is suspected what should be a primary condition
disease-resistant plant varieties
what are some things you should look for to prevent disease when planting seeds
- seeds in good condition and free of disease bodies
- use good quality seed that is not damaged or diseased
How do you know if a seed is disease-free
some can look healthy but can still contain disease. tests can be done for seed-borne diseases
what good soil conditions help plants in a disease attack
- adequate fertilizer
- proper seed placement
- appropriated soil moisture
- oxygen
- temperature
what are cultural practices that help plants if disease occurs
- early seeding
- removing +desposing of diseased plant residue
- crop rotation
- removing noncrop hosts such as weeds that are susceptible to diseases
- thoroughly cleaning equipment after its been used in an area with diseased plants
why does early seeding help fight disease
often if crops are further advanced when disease strikes less damage will occur
why does crop rotation help fight disease
alternating crops prevent the build-up of disease and allow for the use of different pesticides. continual use of the same pesticides can lead to pathogens becoming resistant to pesticides
what are good ways to dispose of diseased plants
tillage, burning. although this can lead land vulnerable to erosion
when is the best time to apply fungicides to be effective
before disease or at the first appearance of symptoms to be effective
what are fungicides
they are pesticides that can kill or inhibit the growth of fungi on plants but aren’t effective against bacteria, nematodes, or viral diseases
what is the difference between systemic fungicides and contact fungicides
contact protect only the plant where the spray is deposited
systematic are absorbed by the plant and are able to move the site of application and to other parts of plants
how can fungicides be applied
can be applied to the seed, propagative organs, foliage, and other aboveground parts of the plant by means of sprayers or injected into trees
