bab i vb 2 diagnosis penyakit abiotik (hara)
DESCRIPTION
klintanTRANSCRIPT
H. HERBICIDE INJURY
• 2,4-d injury on Tomatoes
• Glyphosate injury on Tomatoes
• Rimsulfuron injury on Tomatoes
• herbicide damage on leaves of oak(Quercus)
• Thifensulfuron-methyl injury on Tomatoes
• Cupped distorted leaves on maple (Acer) caused byherbicide damage
• Herbicide injury on apple leaves (Malus)
I. HAIL INJURY
• Hail damage to tomato
J. LIGHTING
• Bark blasted off a bald cypress (Taxodium) by lighting
• Circular pattern of lightning damage
• Signs of lightning injury on tomato plant
• Lighting injury symptoms in tomato stem
K. WIND INJURY
• Wind injury
L. OTHER IMPROPERAGRICULTURAL PRACTICES
• Scar of tree trunk from use of a weed whip
• Fresh mechanical wound with resin.
• Concentric and radial cracking
Penyakit abiotik(kekurangan unsur hara)
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
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
Nitrogen deficiency
Nitrogen deficiency
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
Phosphorus deficiency
Note the stunted plantwith the purple leaves.Severe deficiencies of phosphorus are usually
characterized