1. TRI-CO. YOUNG FARMERS MARCH 7, 2002
WEED IDENTIFICATION
TRI-CO. YOUNG FARMERS
MARCH 7, 2002
Original Power Point Created by Joey Wells
Modified by Georgia Agricultural Education Curriculum Office
June 2002

2. A weed is a plant out of place.
WHAT IS A WEED?
A weed is a plant out of place.

3. WHAT EFFECTS DO WEEDS HAVE ON US TODAY?

4. WEEDS LOWER THE YIELD OF CROPS -
COMPETE FOR WATER, NUTRIENTS, LIGHT, AND SPACE.
ONE WILD MUSTARD PLANT USES AS MUCH N & P AS TWO OAT PLANTS
ONE PIGWEED PLANT MAY USE AS MUCH WATER AS A CORN PLANT

5. WEEDS LOWER THE QUALITY OF CROPS -
WEEDS AFFECT THE QUALITY OF HAY AND GRAIN USED FOR LIVESTOCK
MILK WILL TASTE LIKE WILD GARLIC OR BITTER SNEEZEWEED IF EATEN
WEEDS CAN STAIN THE LINT OF COTTON

6. WEEDS INTERFERE WITH CROP HARVEST -
CAUSES DELAYS AND GREATER HARVEST LOSS.
GRAIN MAY NEED DRYING IF HEAVILY INFESTED BY WEEDS

7. THE LIFE CYCLE OF WEEDS

8. THERE ARE FOUR TYPES OF WEEDS BASED ON THEIR LIFE CYCLE
SUMMER ANNUALS
WINTER ANNUALS
BIENNIALS
PERENNIALS

9. SUMMER ANNUALS
GERMINATE IN THE SPRING AND DIE IN THE FALL AFTER THE FIRST FROST
SEEDS MATURE AND SCATTER
MOST LIE DORMANT UNTIL SPRING
EXAMPLES – MORNING GLORY, PIGWEED, COCKLEBUR, AND CRABGRASS

10. WINTER ANNUALS GERMINATE IN THE FALL OR WINTER
PRODUCE SEED IN THE EARLY SUMMER AND THEN DIE
SEEDS LIE DORMANT DURING THE SUMMER MONTHS
EXAMPLES – WILD MUSTARD, CHICKWEED, AND HENBIT

11. BIENNIALS PRODUCE VEGETATIVELY FROM SEED THE FIRST SEASON
BECOME DORMANT OVER THE WINTER
PRODUCE FLOWERS AND SEED THE SECOND SEASON
EXAMPLES – MUSK THISTLE, WILD CARROT, AND COMMON MULLEIN

12. PERENNIALS LIVE FOR THREE OR MORE YEARS
MOST PRODUCE SEED EACH YEAR AFTER ESTABLISHMENT
DIVIDED INTO THREE CLASSES ON THE BASIS OF REPRODUCTION
SIMPLE PERENNIAL
BULBOUS PERENNIAL
CREEPING PERENNIAL

13. SIMPLE PERENNIAL
REPRODUCE PRIMARILY BY SEED
EXAMPLE - DANDELION

14. BULBOUS PERENNIAL PROPAGATE BY BULBS OR BULBLETS AS WELL AS BY SEED
EXAMPLES – WILD ONION AND WILD GARLIC

15. CREEPING PERENNIAL
PROPAGATE BY MEANS OF RHIZOMES (UNDERGROUND STEMS), STOLONS (ABOVE GROUND STEMS), OR SPREADING ROOTS OR TUBERS, AS WELL AS BY SEED.
EXAMPLES – JOHNSONGRASS > RHIZOMES AND SEED; BERMUDA GRASS > RHIZOMES, STOLONS, SEED

17. CARPETWEED

18. REDROOT PIGWEED

19. SPINY AMARANTH

20. POISON IVY

21. HONEYVINE MILKWEED

22. BUTTERFLY MILKWEED

23. TRUMPETCREEPER

24. JAPANESE HONEYSUCKLE

25. CORN COCKLE

26. HEARTLEAF DRYMARY

27. MOUSEEAR CHICKWEED

28. COMMON CHICKWEED

29. COMMON LAMBSQUARTERS

30. ASIATIC DAYFLOWER

31. HEMP DOGBANE

32. BRISTLY STARBUR

33. COMMON YARROW

34. COMMON RAGWEED

35. GIANT RAGWEED

36. MAYWEED CHAMOMILE

37. WHITE HEATH ASTER

38. SPANISHNEEDLES

39. CORNFLOWER

40. BLESSED THISTLE

41. ECLIPTA

42. ANNUAL FLEABANE

43. HORSEWEED

44. DOGFENNEL

45. HAIRY GALINSOGA

46. CUDWEED

47. BITTER SNEEZEWEED

48. CAMPHORWEED

49. PRICKLY LETTUCE

50. CAROLINA FALSE DANDELION

51. GROUNDSEL

52. GOLDENROD

53. SOWTHISTLE

54. DANDELION

55. COMMON COCKLEBUR

56. DICHONDRA

57. FIELD BINDWEED

58. DODDER

59. BIGROOT MORNINGGLORY

60. TALL MORNINGGLORY

61. CYPRESSVINE MORNINGGLORY

62. SMALLFLOWER MORNINGGLORY

63. WILD MUSTARD

64. SHEPHERDSPURSE

65. SWINECRESS

66. VIRGINIA PEPPERWEED

67. CITRONMELON

68. WILD CUCUMBER

69. BURCUCUMBER

70. YELLOW NUTSEDGE

71. PURPLE NUTSEDGE

72. VIRGINIA COPPERLEAF

73. WOOLLY CROTON

74. TROPIC CROTON

75. SPOTTED SPURGE

76. REDSTEM FILAREE

77. CAROLINA GERANIUM

78. BROOMSEDGE

79. BROADLEAF SIGNALGRASS

80. BERMUDAGRASS

81. CROWFOOTGRASS

82. LARGE CRABGRASS

83. BARNYARDGRASS

84. GOOSEGRASS

85. LITTLE BARLEY

86. FIELD SANDBUR

87. TORPEDOGRASS

88. TEXAS PANICUM

89. VASEYGRASS

90. ANNUAL BLUEGRASS

91. FOXTAIL

92. JOHNSONGRASS

93. SMUTGRASS

94. HENBIT

95. FLORIDA BETONY

96. PARTRIDGE PEA

97. SICKLEPOD

98. SHOWY CROTALARIA

99. FLORIDA BEGGARWEED

100. KUDZU

101. HEMP SESBANIA

102. WINTER VETCH

103. WILD GARLIC

104. ROUNDLEAF GREENBRIAR

105. PRICKLY SIDA

106. CUTLEAF EVENINGPRIMROSE

107. PRICKLYPEAR

108. YELLOW WOODSORREL

109. MAYPOP PASSIONFLOWER

110. COMMON POKEWEED

111. BRACTED PLANTAIN

112. BUCKHORN PLANTAIN

113. BROADLEAF PLANTAIN

114. KNOTWEED

115. PENNSYLVANIA SMARTWEED

116. RED SORREL

117. REDVINE

118. CURLY DOCK

119. BROADLEAF DOCK

120. EASTERN BRACKENFERN

121. COMMON PURSLANE

122. BUTTERCUP

123. BLACKBERRY

124. POORJOE

125. FLORIDA PUSLEY

126. WITCHWEED

127. COMMON MULLEIN

128. JIMSONWEED

129. SMOOTH GROUNDCHERRY

130. HORSENETTLE

131. SILVERLEAF NIGHTSHADE

132. BLACK NIGHTSHADE

133. WILD CARROT

134. PROSTRATE VERVAIN

135. BLUE VERVAIN

136. PEPPERVINE