bab i vb 2 diagnosis penyakit abiotik (hara)
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H. HERBICIDE INJURY
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• 2,4-d injury on Tomatoes
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• Glyphosate injury on Tomatoes
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• Rimsulfuron injury on Tomatoes
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• herbicide damage on leaves of oak(Quercus)
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• Thifensulfuron-methyl injury on Tomatoes
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• Cupped distorted leaves on maple (Acer) caused byherbicide damage
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• Herbicide injury on apple leaves (Malus)
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I. HAIL INJURY
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• Hail damage to tomato
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J. LIGHTING
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• Bark blasted off a bald cypress (Taxodium) by lighting
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• Circular pattern of lightning damage
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• Signs of lightning injury on tomato plant
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• Lighting injury symptoms in tomato stem
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K. WIND INJURY
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• Wind injury
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L. OTHER IMPROPERAGRICULTURAL PRACTICES
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• Scar of tree trunk from use of a weed whip
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• Fresh mechanical wound with resin.
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• Concentric and radial cracking
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Penyakit abiotik(kekurangan unsur hara)
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PENYAKIT TANAMAN AKIBATKEKURANGAN HARA
Nutrients essential to plant growthElement Chemical symbol form(s) taken up by plant
MacronutrientNitrogen N NH4
+, NO3-
Phosphorus P H2PO4-, HPO4
2-
Potassium K K+
Calcium Ca Ca2+
Magnesium Mg Mg2+
Sulfur S SO42-
MicronutrientIron,Zinc,Maganese,Copper,Boron,Molybdenum,Chlorin
Silicon, Sodium, Cobalt, vanadium
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NITROGENROLE IN PLANT NUTRITION: Amino
acid synthesis. Protein, coenzymes, nucleicacid formation. Chlorophyll and ATP
synthesisDEFICIENCY SYMPTOMS :Lack of
growth or stunted growth. General yellowingof foliage, older leaves first. Loss of leaves
under severe deficiency. Purplish colourationdue to accumulation of anthocyanin
pigments
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Nitrogen deficiency
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Nitrogen deficiency
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PHOSPHORUS• DEFICIENCY SYMPTOMS: Reduced
growth. Production of dark green foliage.Reduced tillering in cereals. Reddening oryellowing of leaf margins and necrosis ofolder leaves. Reduced fruit quality andstorage potential
• ROLE IN PLANT NUTRITION Energytransfer. Formation of nucleic acids.Protein synthesis. Cell membranecomponent
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Phosphorus deficiency
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Note the stunted plantwith the purple leaves.Severe deficiencies of phosphorus are usually
characterized