OREGON PESTICIDE APPLICATOR - RIGHT OFF WAY EXAM QUESTIONS AND ANSWERS VERIFIED GRADED A++
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Course
RIGHT OF WAY PESTICIDE
Institution
RIGHT OF WAY PESTICIDE
OREGON PESTICIDE APPLICATOR - RIGHT OFF WAY EXAM QUESTIONS AND ANSWERS VERIFIED GRADED A++
Epinasty
abnormal downward curving growth or movement of a leaf resulting from more rapid growth of cells on the upper rather than on the lower side of the leaf stalk
IPM
Integrated Pest Management
T...
Different foliar wetting. The shape of plant parts affect how spray is retained. Spray retention is key.
Locations of growing points changes method of poison delivery.
Plants tolerance
Directed spray or shielding beneficial plants physically
Factors affecting herbicide activity - How selective herbicides work
Growth habits. Broadleaf perennial weeds have deep, underground root systems while perennial grasses
may use rhizomes or stolons and survive chemical and mechanical means. Allowing perennial growth
, controls root reserve which allows perennial eradication. Annuals have fibrous or tap root systems
difficult to control manually and variable chemical success.
Weed control factors. Control methods and herbicide use is based on species present. Stages of growth.
Annuals are easiest to control at seeding stage. Perennial should not be allowed to establish past
seedling else they must be controlled through good storage depletion.
Environmental conditions. Herbicide activity is directly proportional to temperature. Dinoseb and MSMA
work only at higher temp with 2,4-D having more latitude. Herbicide effectiveness is directly
proportional to humidity due to a thinner cuticle and open stoma. precipitation is related to humidity
and is an important leaching factor or an herbicide activator.
Weed resistance factors
Monocotyledons (monocots)
Flowering plants whose seeds typically contain only one embryonic leaf, or cotyledon.
Grasses.
Rushes.
Dicotyledon
1. A subdivision of flowering plants whose members possess an embryonic seed leaf made of two halves
or cotyledons.
2. Herbaceous broad-leafs.
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