Weed Test 4 Flashcards

Question

Spray first or fertilize

Answer 1

Spray. SO weeds don't take up the nutrients intended for the grasses. Control your existing weeds then have soil-test done to know the best lime and fertilizer program

Answer 2

spray when weeds are more than 20% of pasture

Answer 3

keep weeds small (more palatable) many weeds have same protein levels as forages have to have good fencing and enough livestock to work

Answer 4

reduces seeds mowing 3x year for 2 years provides 80-90% control in most species too late to prevent competition no selectivity perennials regrow consistency is the key for effective weed control

Answer 5

broadleaf weeds in grass pastures | winter weeds in dormant bermudagrass

Answer 6

summer grasses in bermudagrass broadleaf weeds in legumes sedges fescue in bermudagrass

Answer 7

(henbit, chickweed, buttercup, thistles) | dec-mar

Answer 8

(spiny amaranth, bitter sneezeweed) | apr-july

Answer 9

est after good weed control 1-2 years | 2,4-D amine safe on white clover and lespedeza

Answer 10

most common pasture weeds buttercup, thistle, ragweed, pigweed cheapest ($35 for 2.5gal) $3.50/A (1 qt rate)

Answer 11

``` (dicamba + 2, 4-D) controls most common pasture weeds buttercup, thistle, ragweed, pigweed, red sorrel, plantain $69 for 2.5gal $5.25/A (1.5 pt rate) ```

Answer 12

controls most common pasture weeds buttercup, thistle, ragweed, pigweed, red sorrel, plantain $81 for 2.5gal $6/A (1.5 pt rate)

Answer 13

``` (aminopyralid + 2, 4-D) broadleaf weed control 7 day haying control 1.5-2.6 pt/A damages legumes restricted use ```

Answer 14

``` BASF pendimethalin apply only to dormant bermudagrass should not be applied less than 60 days prior to hay harvest or 45 days to grazing 2.1-3.2 qt/A ```

Answer 15

metsulfuron + nicosulfuron stunt bermudagrass temporarily use on est bermudagrass only tank mix with 2, 4-D amine to improve thistle, ragweed, and plantain control

Answer 16

treat seedling stage (late winter- early spring) 1-2pt/A 2,4-D grazon P+D weedmaster

Answer 17

``` treat when small (2-4in) early may ally/cimarron grazon P+D 2,4-D germinates all summer repeat as needed ```

Answer 18

``` late fall or early spring treat at rosette leaf stage 2,4-D ester weedmaster grazon P+D ```

Answer 19

``` johnsongrass control use surfactant 18-24in spray after regrows after first cutting (june) must be actively growing good temps and good moisture don't spray big, tough, full seedhead, drought stressed if not actively growing it won't kill it ```

Answer 20

learn to identify and know weed life cycle good turf maintenance prevent weed introduction start control program

Answer 21

read textbooks and periodicals keep diagnostic tool kit (hand lens etc) know biology of the weed confirm identification and diagnosis

Answer 22

monocot hollow stem leaves in 2 vertical rows

Answer 23

triangular solid stem | leaves in 3 vertical rows

Answer 24

dicot | showy flowers

Answer 25

``` wild garlic (lily family) path rush (rush family) star or bethlehem (lily family) ```

Answer 26

``` germinate in spring soil temp 55 flower in summer die in fall- first frost ex: crabgrass, goosegrass, shephard's purses ```

Answer 27

germinate in fall grow until spring die late spring or early summer ex: henbit, chickweed, spurges

Answer 28

completes life cycle in 2 years flowering and seed production second year ex: wild carrot, bull thistle

Answer 29

capable of living more than 2 years by producing rhizomes or tubers ex:cool- dandelion, clover warm- nutsedge, dallisgras

Answer 30

``` use adapted turfgrass fertilization watering mow correctly disease and insect control drainage compaction relief ```

Answer 31

mowing shorter tends to take out crabgrass in tall fescue

Answer 32

excess nitrogen promotes common chickweed, ryegrass, annual bluegrass low nitrogen leads to clovers, lespedeza, mosses, speedwell high phosphorus encourages annual bluegrass low soil pH and general fertility favors red sorrel and broomsedge

Answer 33

1. eternal vigilance- do not let weeds go to seed- 1 year's seedling= 7 years of weeding 2. use weed free planting material 3. weed-free top soil 4. clean equipment 5. clean borders (ditches, fencerows)

Answer 34

``` herbicide error is 99% human error calibration errror wrong herbicide wrong timing wrong weed identification formulation error failure to make follow up applications bad product weather surfactant know the product ```

Answer 35

physical- can it clabber in the tank (2,4-D amine and MSMA) chemical- loss of activity due to tank mix interaction (certainty with amine and 2,4-D) mode of action- rapid burn product with slow acting translocated product (Roundup and Reward or Finale)

Weed Test 4 Flashcards

(59 cards)