TEACHERS
GALLERY
PRICING
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Published on Nov 19, 2015
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PRESENTATION OUTLINE
1.
SQUASH
BY: MAGGIE, HALEY, TANNER, JOHN, ZACH
Photo by
L'eau Bleue
2.
DISEASES
Bacterial Wilt
Downy Mildew
Anthracnose
Gummy Stem Blight
Cercospora Leaf Spot
3.
BACTERIAL WILT
Treatments- no chemical control once the plant is infected.
Symptoms- severe wilting of the vine, followed by death
Mgmt- spray insecticides to control the beetles
Causes- the cause of this disease is spotted cucumber beetles
Description- slow increse of disease, then rapid death and wilting
Photo by
Raleigh City Farm
4.
DOWNY MILDEW
Description- leaf disease that usually effects only leaves
Symptoms- small yellow areas on leaf, may become brown
Causes- Psuedoperonospora cubensis
Prevention- speay disease resistant fungicides
Treatment- if disease becomes serious enough, spray fungicides with chemical warrant
Photo by
Scot Nelson
5.
ANTHRACNOSE
Description- fungal, prefers cool rainy weather, creates shot hole appearence
Symptoms- yellow water soaked spots, dry tissue, shot hole appearence
Causes- Colletotrichum obiculare, cool and rainy for several days straight
Prevention- Remove and destroy old vines, rotate crops
Treatment- use fungicides if serious enough
Photo by
Scot Nelson
6.
GUMMY STEM BLIGHT
Description- stem and leaf disease, fungal
Symptoms- brown or tan spots, stem may split into open wounds
Causes- Didymella brioniae, also causes fruit rot
Prevention- purchase seed from reputable source, no disease resitant fungicide
Treatment- disease preventative fungicides
Photo by
Scot Nelson
7.
CERCOSPORA LEAF SPOT
Description- usually limited to leaves, may effect petiole and stem
Symptoms- black spots on leaves, usually in older leaves
Causes- fungus, spores that are wind blown
Prevention- avoid overhead irrigation, rotate crops every 2-3 years
Treatment- home use fungicides available, destroy old vines
Photo by
Scot Nelson
8.
INSECTS
Photo by
Hammonton Photography
9.
INSECTS
Cutworms
Aphids
Spider Mites
Whiteflies
Spotted Cucumber Beetles
10.
CUTWORMS
Gray grubs that are 1/2 to 3/4 inches long
Can be found curled in the soil
Chew stems roots and leaves
Controls and prevention: place 3 inch paper collar around stem
Keep garden free of weeds and sprinkle wood ash around plant base
Photo by
Sam Droege
11.
APHIDS
Tiny oval yellow and green insects. Colonize underside of leaves
Leave behind sticky excrement called honeydew
Can turn into black sooty mold
Leaves curl under and become deformed and yellow
Use insecticidal soap
Photo by
Gustavo Mazzarollo
12.
SPIDER MITES
Leave dusty silver webs on undersides of leaves
Suck plant juices to cause stippling
Leaves turn pale green, yellow, or brown
Spray with water or insecticidal soap
Lacewings and lady bugs eat spider mites
13.
WHITEFLIES
Tiny white winged insects
Congregate on undersides of leaves
Leaves will yellow
Remove infested leaves or whole plant if infestation is serious
Intoduce beneficial insects into greenhouse
Photo by
Mean and Pinchy
14.
SPOTTED CUCUMBER BEETLE
Greenish, yellowish 1/4 inch long with black spots
Holes chewed in leaves, young fruit is scarred
Plant resistant varieties and dust with wood ash
Cultivate before planting to disrupt life cycle
Hand pick and mulch around plants
Photo by
cotinis
Zach Devore
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