100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
PESTICIDES: RIGHT-OF-WAY & NATURAL AREAS EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED $11.49   Add to cart

Exam (elaborations)

PESTICIDES: RIGHT-OF-WAY & NATURAL AREAS EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED

 2 views  0 purchase
  • Course
  • Institution

PESTICIDES: RIGHT-OF-WAY & NATURAL AREAS EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED Definition of a weed: Unwanted plants: A plant can be a weed in one spot but not a weed in a different spot. Two main goals of weed management: 1. Minimize weed competition. (They compete with...

[Show more]

Preview 4 out of 55  pages

  • November 3, 2024
  • 55
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
avatar-seller
PESTICIDES: RIGHT-OF-WAY & NATURAL AREAS EXAM

QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS

VERIFIED


Definition of a weed:

Unwanted plants: A plant can be a weed in one spot but not a weed in a different spot.

Two main goals of weed management:

1. Minimize weed competition. (They compete with desirable species)



2. Limit the weed's reproduction (This makes them more manageable in years to come)

How do you distinguish grasses from broadleaf plants?

Grasses (or monocots-they have a single cotyledon at germination):

-have narrow leaves with parallel veins

-fibrous root system

-reproduce mostly by seed, stolons, or rhizomes

-the growing point is usually at or below soil surface

--growing point is at top of the plant once it reaches the flowering stage

-usually produce tillers (secondary stems) form buds at the base of the primary stem



Broadleaves (dicots- two cotyledons at germination):

-have leaf veins that form a net-like or branching pattern

-generally have a tap root

,-growing point is visible at tip of shoot

-most species reproduce by seed, but some have vegetative buds either in the crown or

on the taproot, and some reproduce by spreading roots

-are further classified as either herbaceous or woody plants

How do you distinguish herbaceous plants from woody plants?

Two types of broadleaf plants



Herbaceous Plants:

-lack hard, bark layer



Woody Plants:

-have a thickened layer of dense tissue (bark) on the outside of stems

-trees, shrubs, vines

Describe the life cycles and propagation of annual plants:

Annual weeds live less than 12 months and can produce lots of seeds in a single

growing season. Many of these seeds germinate the following year, but others may not

germinate for several years. Annuals are most troublesome in cultivated areas and

disturbed sites (e.g. newly planted areas).



Summer annuals germinate from seed int eh spring, flower and produce seed during

the summer, and die in late summer or fall. They overwinter as seed and are most

serious in spring-seeded ornamentals.

,Winter annuals germinate from seed in the fall, overwinter as low-growing plants,

flower and produce seed the next spring, and then die.

Describe the life cycles and propagation of biennial plants:

Biennial weeds life for two growing seasons. Germinate from seed in spring/summer

and produce a "rosette" of leaves on the soil surface. Biennials overwinter in this rosette

stage. The following year they flower, produce seed, and die.

Describe the life cycles and propagation of perennial plants:

Perennial plants live for at least two years, and sometimes much longer. They may

reproduce by seed alone, or may spread vegetatively by: stolons, rhizomes, spreading

roots, tubers, or bulbs.



Perennials that germinate from seed often don't flower during their first year. The top

growth of herbaceous perennials flexed back each winter, so their survival depends on

storing food in underground vegetative structures. They resume growth the following

year, in which they flower and set seeds. They continue to do this every year thereafter.

Outline what you need to kill annual plants and when is it easiest to do so?

Annual weeds are generally the easiest to control, but due to abundance and high seed

production, it can be costly.



Both summer and winter annuals are easiest to control when they are small.



Annuals and biennials reproduce only by seed. Controlling these weeds with tillage or

herbicides will kill them and stop seed production, which will reduce future weed

, problems.



To kill annuals or biennials, you must kill the whole shoot. Tillage or and herbicides are

often more effective than mowing because mowing may not remove all the growing

points (in grasses, the growing point remains at ground level and in protected within the

stem during the seedling and tillering growth stages).

Outline what you need to kill biennial plants and when is it easiest to do so?

Biennials are best controlled with herbicides during the rosette stage. (When mowing or

hand labor is used, a better approach may be to focus on removing the flower stalk to

prevent seed set.)



Annuals and biennials reproduce only by seed. Controlling these weeds with tillage or

herbicides will kill them and stop seed production, which will reduce future weed

problems.



To kill annuals or biennials, you must kill the whole shoot. Tillage or and herbicides are

often more effective than mowing because mowing may not remove all the growing

points (in grasses, the growing point remains at ground level and in protected within the

stem during the seedling and tillering growth stages).

Outline what you need to kill perennial plants and when is it easiest to do so?

Perennials are the most persistent and difficult weeds to control.



You usually cannot kill a perennial weed by destroying its top growth just once- the

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller NurseAdvocate. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $11.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

85169 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$11.49
  • (0)
  Add to cart