Fungicide – Label colour
Green label , Generic name: Azoxystrobin 23 SC , Trade name: Abound, Amistar, Heritage, Mirrador , Dosage : 1 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Strobilurins , Remarks: Systemic fungicide. Control of powdery mildew, downy mildew, leaf spot and leaf blight diseases in mango and cucurbits
Green label , Generic name: Captan 50 WP , Trade name: Captaf, Captan, Dhanutan 50% WP Dosage : 3-4 gram/litre of water (Spray fluid 500 litre/ha) , 1.5 gram/kg seed. , Chemical class: Phthalamides , Remarks: Control of leaf spot and leaf blight diseases in mango and cucurbits
Green label , Generic name: Captan 75 SP , Trade name: Delton, Dhanuban, Hexacalt Dosage : 1.5-2 kg/ha or 3-4 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Phthalamides , Remarks: Seed treatment and control of damping off in Chillies, cabbage, tomato
Green label , Generic name: Carbendazim 25 WP , Trade name: B-Stin; Dosage : 2 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Benzimidazole , Remarks: Systemic fungicide. Seed treatment, post harvest disease control, control of leaf spot, leaf blight etc. in field crops, fruits and vegetables
Green label , Generic name: Carbendazim 46.27 SC , Trade name: Batista, Fungiguard, Nakshathra, Perl , Dosage : 1 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Benzimidazole , Remarks: Systemic fungicide. Control of powdery mildew in mango
Green label , Generic name: Carbendazim 50 WG , Trade name: Derosul; Dosage : 2 gram/kg of seed , Chemical class: Benzimidazole , Remarks: Systemic fungicide. Seed treatment and control of damping off disease in fruits, vegetables, pulses and oil seeds
Green label , Generic name: Carbendazim 50 WP , Trade name: Bavistin, Benfil, Bengard, Benlate, Benmain, Bensaan, Carben, Carziim50, Dhanustin, Dhanustin 50 WP, Fungiguard, Gancarzin50, Glizim, Mintho, Tagstin, Tiara, Zoom Dosage : 500 gram/ha or 1 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Benzimidazole , Remarks: Systemic fungicide. Seed treatment, soil drenching and foliar spraying. Control of powdery mildew in ornamental plants and blast, sheath blight and sheath rot in rice.
Green label , Generic name: Carbendazim 12 + Mancozeb 63 WP , Trade name: Companion, Dasma, Hi-Jip, Kuber, Macoban , Macoban C Trophy, Merger, Nagarjuna Combi+, Revive 750, Riper, Saaf, Sixer, Sprint, Stuff , Dosage : 1 kg/ha or 2 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Benzimidazole + Dithiocarbamate , Remarks: Systemic fungicide. Control of leaf spot, leaf blight etc. in different crops ; glume discolouration in rice.
Green label , Generic name: Carpropamid 27.8 SC , Trade name: Arcado, Protega , Dosage : 500 ml/ha or 1 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Cyclopropane carboxamide , Remarks: Systemic fungicide. Control of blast and sheath blight in rice.
Green label , Generic name: Fosetyl-Al 80 WP , Trade name: Aliette; Dosage : 2-3 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Ethyl phosphonate , Remarks: Systemic fungicide. Control of azhukal and damping off in cardamon
Green label , Generic name: Kresoxim methyl 44.3 SC , Trade name: Ergon; Dosage : 1 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Strobilurins , Remarks: Control of blast and sheath blight in paddy
Green label , Generic name: Lime Sulphur 22 EC , Trade name: Lime sulfur solution; Dosage : 4-5 ml /litre of water (Spray fluid 500 litre/ha) , Chemical class: Inorganic Sulphur , Remarks: Control of powdery mildew in apple and grapes
Green label , Generic name: Mancozeb 35 SC , Trade name: Hydroman, Safety , Dosage : 3-5 ml /litre of water (Spray fluid 500 litre/ha) , Chemical class: Ethylene bis dithiocarbamate , Remarks: Control of early blight and late blight in tomato
Green label , Generic name: Mancozeb 75 SP , Trade name: Mancoban; Dosage : 3-4 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Ethylene bis dithiocarbamate , Remarks: Control of early blight in tomato
Green label , Generic name: Mancozeb 75 WG , Trade name: Mafil; Dosage : 2-4 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Ethylene bis dithiocarbamate , Remarks: Control of early blight in tomato
Green label , Generic name: Mancozeb 75 WP , Trade name: Devidayal M-45, Dhanuka M 45, Dhanuka M-45, Dithane, Dithane M-45, Hilthane, Hindustan M 45, Indofil M 45, Izeb M-45 Manzate, Luzen-45, Macoban, Macoban M-45, Mancosaan, Mancosaan M-45, Maneb Manzane, M-Guard, Savour M 45, Tata M-45 Eurofil-NT, Uthane M-45, Veera, Zinthane Dosage : 1.5-2 kg/ha or 3-4 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Ethylene bis dithiocarbamate , Remarks: Control of blast in paddy, late blight and leaf spot in tomato, damping off, fruit rot in chillies, cigar end rot, sigatoka leaf spot in banana
Green label , Generic name: Potassium phosphonate 40 , Trade name: Akomin; Dosage : 2 litre/ha or 4 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Phenyl Urea , Remarks: Systemic fungicide. Growth regulator. Control of phytophthora foot rot of black pepper.
Green label , Generic name: Sulphur 40 SC , Trade name: Super Sonic SC; Dosage : 4-5 ml /litre of water (Spray fluid 500 litre/ha) , Chemical class: Inorganic Sulphur , Remarks: Control of powdery mildew disease
Green label , Generic name: Sulphur 55.1 SC , Trade name: Nansulf flow; Dosage : 3 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Inorganic Sulphur , Remarks: Control of powdery mildew disease
Green label , Generic name: Sulphur 80 DP , Trade name: Five star; Dosage : 15-20 kg/ha , Chemical class: Inorganic Sulphur , Remarks: Control of powdery mildew disease
Green label , Generic name: Sulphur 80 WDG , Trade name: Cosavet, Dhanusul, Koshavet 80 WDG, Mainsul, MicrosulWDG, Nanthiin DF Sulfexgold, Sulfil, Sulfoguard, Villo Dosage : 2-4 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Inorganic Sulphur , Remarks: Control of powdery mildew disease
Green label , Generic name: Sulphur 80 WP , Trade name: Dhanusul 80 WP , Dhanusulf, Ganesulf, Insulf, Microsul, Sulfex, Sulfix 80 WPSulfex80, Tagsulf, Thiovit, Wettasul , Dosage : 1-2 kg/ha or 2-4 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Inorganic Sulphur , Remarks: Control of Powdery mildew and mite
Green label , Generic name: Sulphur 85 DP , Trade name: Dhanusul 85 DP; Dosage : 15-20 kg/ha , Chemical class: Inorganic Sulphur , Remarks: Control of powdery mildew
Green label , Generic name: Triacontanol EW 0.1 5 MIN , Trade name: Urekha, Vishal , Dosage : 2 to 3 ml / litre of water , Chemical class: Saturated primary alcohols , Remarks: Plant growth regulator
Blue label , Generic name: Bitertanol 25 WP , Trade name: Baycor; Dosage : 2 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Triazoles , Remarks: Systemic fungicide. Control of rust in ground nut, coffee etc . and tikka leaf spot in ground nut etc.
Blue label , Generic name: Captan 70 +Hexaconazole 5 WP , Trade name: Panther Gold, Takatvar Taquat , Dosage : 1-2 gram/litre of water (Spray fluid 500 litre/ha) , 1.5 gram/kg seed. , Chemical class: Chlorinated nitrobenzene + Triazole , Remarks: Control of foot rot in chillies, early blight and late blight in potato
Blue label , Generic name: Carbendazim 25 +Flusilazole12.5 SE , Trade name: Lustre; Dosage : 1 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Benzimidazole + Triazole , Remarks: Systemic fungicide. Control of sheath blight in paddy
Blue label , Generic name: Carboxin 75 WP , Trade name: Vitavax; Dosage : 1.5 gram/kg of seed , Chemical class: Carboxanilide , Remarks: Systemic fungicide. Seed treatment. Control of smut diseases in cereals
Blue label , Generic name: Carboxin 17.5 +Thiram 17.5 FF , Trade name: Vitavax Ultra 200 FF; Dosage : 2.5-3 gram/kg of seed , Chemical class: Carboxanilide + Dithiocarbamate , Remarks: Seed treatment. Control of smut diseases in cereals
Blue label , Generic name: Carboxin37.5 +Thiram 37.5 WP , Trade name: Trooper, Vitavax powder , Dosage : 1-1.5 gram/kg of seed , Chemical class: Carboxanilide+Dithiocarbamate , Remarks: Control of collar rot in soyabean, ground nut
Blue label , Generic name: Chlorothalonil 75 WP , Trade name: Cluch 70 WP, Ishaan, Kavach 75 WP, Odeon , Dosage : 1.5-3 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Chloronitrile , Remarks: Control of tikka and rust in ground nut, early and late blight in potato
Blue label , Generic name: Copper Hydroxide 77 WP , Trade name: HiDice, Kocide 101 , Dosage : 500-750 gram/ha or 1-1.5 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Inorganic copper , Remarks: False smut control at 50 % flowering stage ???? (Check whether it can be used in rice). Control of leaf spot, leaf blight etc. in different crops Soil drenching and foliar spraying.
Blue label , Generic name: Copper Oxychloride 20 EC , Trade name: Cutox; Dosage : 2-4 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Inorganic copper , Remarks: Foliar spray, Soil drenching. Control of leaf spot in citrus, cardamon, chillies, betel vine, banana
Blue label , Generic name: Copper Oxychloride 50 WP , Trade name: Bensaan, Blitox, Blue copper, Bluetrox, Copter, Cupramar, Cuprina, Dhanucop, Fytolan, Fytox, Fytran, Fytolan, Hilcopper, Killex copper, Maincop Dhanucop, Star cop, Tagcop, Trucop, Dosage : 1 -1.5 kg/ha or 2-3 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Inorganic copper , Remarks: Foliar spray, Soil drenching. Control of leaf spot in citrus, cardamon, chillies, betel vine, banana etc.
Blue label , Generic name: Copper Oxychloride 56 ODP , Trade name: COC-ODP56%, Bluetrox, Fytox Dosage : 8 kg/40 litre/ha of agricultural spray oil in low volume spray like micron sprayer, helicopter spray , Chemical class: Inorganic copper , Remarks: Control of abnormal leaf fall of rubber
Blue label , Generic name: Copper Oxychloride 56 WP , Trade name: Tagcop; Dosage : 1 -1.5 kg/ha or 2-3 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Inorganic copper , Remarks: Foliar spray, Soil drenching. Control of leaf spot in citrus, cardamon, chillies, betel vine, banana etc.
Blue label , Generic name: Copper Sulphate , Trade name: Blue Sea’s, Copper Blues, TCF Brand Dosage : 1 kg for preparing 100 litres of Bordeaux mixture , Chemical class: Inorganic copper , Remarks: Foliar spray, Soil drenching.
Blue label , Generic name: Cyazofamid 34.5 SC , Trade name: Ranman; Dosage : 4 ml/ 10 litre of water (Spray fluid 500 litre/ha) , Chemical class: Cyanoimidazole , Remarks: Control of late blight in potato and tomato
Blue label , Generic name: Cymoxanil 50 WP , Trade name: Curzate; Dosage : 2.5 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Acetamide , Remarks: Leaf spot and leaf blight diseases of vegetables
Blue label , Generic name: Cymoxanil 8 +Mancozeb 64 WP , Trade name: Cruzate, Cymagan, Moximate, Qurqte Gold , Dosage : 3-4 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Acetamide+Dithiocarbamate , Remarks: Control of late blight in potato and tomato. Downey mildew in cucumber.
Blue label , Generic name: Difenoconazole 25 EC , Trade name: Score 25 EC; Dosage : 0.5 ml/ litre of water (Spray fluid 500 litre/ha) , Chemical class: Triazole , Remarks: Systemic fungicide. Control of Sheath blight of rice, die back and fruit rot in chilli, Powdery mildew in cucurbits
Blue label , Generic name: Dimethomorph 9WP + Mancozeb 60WP , Trade name: Acrobat MZ; Dosage : 0 , Chemical class: Cinnamic acid-morpholine derivative + Dithiocarbamate , Remarks: 0
Blue label , Generic name: Dinocap 48 EC , Trade name: Arathane, Karathane , Dosage : 1 litre/ha or 2 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Dinitrofungicide , Remarks: Control of powdery mildew in cucurbits and rose
Blue label , Generic name: Dodine 65 WP , Trade name: Noor; Dosage : 0.75 gram/ litre of water (Spray fluid 500 litre/ha) , Chemical class: Substituted acetate , Remarks: Control of scab in apple
Blue label , Generic name: Famoxadone16.6 +Cymoxanil22.1 SC , Trade name: Equation Pro; Dosage : 1 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Cinnamic acid amides + Acetamide , Remarks: Control of late blight of potato and tomato.
Blue label , Generic name: Fenamidone4.44 + Forestyl AL 66.7 WG , Trade name: Verita; Dosage : 4-5 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Imidazolinone+Ethyl Phosphonate , Remarks: Control of downey mildew in grapes
Blue label , Generic name: Flusilazole 40 EC , Trade name: Cursor, Nustar , Dosage : 125 ml/ha or 2.5 ml/ 10 litre of water (Spray fluid 500 litre/ha) , Chemical class: Triazole , Remarks: Systemic fungicide. Control of sheath blight of rice, fungal wilt of vegetables.
Blue label , Generic name: Hexaconazole 2 SC , Trade name: Samarth; Dosage : 3-5 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Triazole , Remarks: Systemic fungicide. Control of powdery mildew and fruit rot in chilli. Early blight and late blight in potato.
Blue label , Generic name: Hexaconazole 5 EC , Trade name: Alert Creeper, Contaf, Corazole, Danzole, Force 5C, Hexaan, Hexacone, Hexadhan, Hexamax, Hexan, Hexazole, Mainex EC, Sitara, Strike, Titan, Topper, Topper plus EC, Xantho, Dosage : 1-2 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Triazole , Remarks: Systemic fungicide. Control of sheath blight, brown spot, glume discolouration and sheath rot in rice. Foliar spraying and soil drenching.
Blue label , Generic name: Hexaconazole 5 SC , Trade name: Contaf plus, Danzole plus, Force plus 5, Fowmox, Hexaan white, Hexadhan plus, Hexan white, Hexazole Gold, Nagarjuna Mass+, Remo, Sitara plus, Xantho Premium , Dosage : 500-1000 ml/ha or 1-2 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Triazole , Remarks: Systemic fungicide. Control of powdery mildew in mango, sheath blight in rice
Blue label , Generic name: Iprodione 25 +Carbendazim 25 WP , Trade name: Double dose, Quintal , Dosage : 1 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Diacarboxamide + Benzimidazole , Remarks: Control of sheath blight and blast in rice.
Blue label , Generic name: Iprodione 50 WP , Trade name: Rovral; Dosage : 1-2 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Dicarboxamide , Remarks: Control of sheath blight in rice, early blight in tomato
Blue label , Generic name: Isoprothiolane 40 EC , Trade name: Fujii-One 40E, Isomain, Rhizo Dosage : 750 ml/ha or 1.5 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Dithiolane , Remarks: Systemic fungicide. Control of blast disease of rice.
Blue label , Generic name: Mancozeb 64 +Metalaxyl 8 WP , Trade name: Syscon; Dosage : 2-3 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Dithiocarbamate+ Acylalanine , Remarks: Control of foot rot in black pepper
Blue label , Generic name: Mandipropamid 23.4 SC , Trade name: Rervus; Dosage : 8 ml/ 10 litre of water (Spray fluid 500 litre/ha) , Chemical class: Mandelamide , Remarks: Control of late blight in potato and tomato
Blue label , Generic name: Metalaxyl 35 WS , Trade name: Bilaxyl, Galaxy PC Metals, Metal-D, Tagron , Dosage : 6-7 gram/kg seed , Chemical class: Acylalanine , Remarks: Systemic fungicide. Control of sorghum downy mildew
Blue label , Generic name: Metalaxyl 8 +Mancozeb 72 WP , Trade name: Tagmill; Dosage : 2-3 gram/litre of water (Spray fluid 500-1000 litre/ha) , Chemical class: Acylalanine+Dithiocarbamate , Remarks: Control of foot rot in black pepper, late blight of potato
Blue label , Generic name: Metalaxyl 8 WS , Trade name: Metal; Dosage : 2-3 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Acylalanine , Remarks: Systemic fungicide. Control of foot rot in black pepper, late blight of potato
Blue label , Generic name: Myclobutanil 10 WP , Trade name: Boon, Index, Myclobil, Myclomain, Mycoguard, Systhane , Dosage : 4 gram/10 litre of water (Spray fluid 500 litre/ha) , Chemical class: Triazole , Remarks: Control of powdery mildew in grapes and chillies
Blue label , Generic name: Penconazole 10 EC , Trade name: Topas; Dosage : 5 ml/10 litre of water (Spray fluid 500 litre/ha) , Chemical class: Triazole , Remarks: Systemic fungicide. Control of powdery mildew in pulses, mango, grapes
Blue label , Generic name: Pencycuron 22.9 SC , Trade name: Monceren; Dosage : 500- 750 ml/ha or 1-1.5 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Triazole , Remarks: Control of Sheath blight of rice
Blue label , Generic name: Propiconazole 14.3 EC , Trade name: Banner; Dosage : 2 ml/ litre of water (Spray fluid 500 litre/ha) , Chemical class: Triazole , Remarks: Systemic fungicide. Control of sheath blight and false smut in rice.
Blue label , Generic name: Propiconazole 25 EC , Trade name: Bumper, Dhan, Pinade, Propiguard, Propik Final, Radar, Result, Tilt, Tilt Albu, Zetox , Dosage : 500 ml/ha or 1 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Triazole , Remarks: Systemic fungicide. Control of sheath blight and false smut in rice.
Blue label , Generic name: Propineb 70 WP , Trade name: Addit, Propinex, Proximain, Sanipeb , Dosage : 1250 gram/ha or 2.5 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Propalane bis dithiocarbamate , Remarks: Control of glume discolouration and brown spot in rice
Blue label , Generic name: Pyraclostrobin 20 EC , Trade name: Insignia; Dosage : 1 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Strobilurins , Remarks: Systemic fungicide. Control of early blight in tomato, tikka leaf spot in ground nut
Blue label , Generic name: Pyraclostrobin 5 + Meritram 55 WG , Trade name: Clutch; Dosage : 3-3.5 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Strobilurin + Dithiocarbamate , Remarks: Control of early blight in tomato, late blight in potato, anthracnose in chilli.
Blue label , Generic name: Streptomycin sulphate + Tetracycline Hydrochloride 90.10 SP , Trade name: Tagmycin; Dosage : 250-500 mg/litre of water , Chemical class: Streptomycin sulphate + Tetracycline hydrochloride , Remarks: Bacterial wilt and spot diseases. Spraying and drenching
Blue label , Generic name: Tebuconazole 24 SC , Trade name: Spencer, Vista , Dosage : 6 ml/10 litre of water (Spray fluid 500 litre/ha) , Chemical class: Triazole , Remarks: Systemic fungicide. Control of powdery mildew disease and balst and sheath blight in rice.
Blue label , Generic name: Tebuconazole 25.9 EC , Trade name: Folicur, Orius, Tebustar Dosage : 1-1.5 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Triazole , Remarks: Systemic fungicide. Control of balst and sheath blight in rice.
Blue label , Generic name: Thifluzamide 24 SC , Trade name: Pulser; Dosage : 7.5 gram/10 litre of water (Spray fluid 500 litre/ha) , Chemical class: Carboxanilide , Remarks: Control of sheath blight in rice
Blue label , Generic name: Thiophanate Methyl 70 WP , Trade name: Maxim, Roko, Topmast, Uppay , Dosage : 500 gram/ha or 1 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Thiourea , Remarks: Systemic fungicide. Control of powdery mildew in cow pea
Blue label , Generic name: Thiram 75 WS , Trade name: Hexathir, Tagithram, Thiram 75 DS, Thiride, Vegfru Thiram Dosage : 3-4 gram/kg seed , Chemical class: Dithiocarbamate , Remarks: Seed treatment
Blue label , Generic name: Triacontanol GR 0.5 MIN , Trade name: Speed-up; Dosage : 0.5 to 1.5 ml / litre of water , Chemical class: Saturated primary alcohols , Remarks: Plant growth regulator
Blue label , Generic name: Triadimefon 25 WP , Trade name: Bayelton; Dosage : 1 gram/litre of water , Chemical class: Triazole , Remarks: Systemic fungicide. Control of powdery mildew disease
Blue label , Generic name: Tridemorph 80 EC , Trade name: Calixin; Dosage : 500 ml/ha or 1 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Morpholenes , Remarks: Systemic fungicide. Control of stem bleeding in coconut.
Blue label , Generic name: Trifloxystrobin 25 +Tebuconazole 55 WG , Trade name: Nativo , , Dosage : 250 gram/ha or 5 gram/10 litre of water (Spray fluid 500 litre/ha) , Chemical class: Strobilurins + Triazole , Remarks: Systemic fungicide. Control of brown spot, blast, sheath blight, glume discolouration and sheath rot in rice.
Blue label , Generic name: Ziram 27 SC , Trade name: Dhanuka Z-27; Dosage : 3-5 ml/litre of water (Spray fluid 500 litre/ha) , Chemical class: Dimethyl Dithiocarbamate , Remarks: Control of leaf spot and blight diseases
Blue label , Generic name: Ziram 80 WP , Trade name: Hexazir, Vegfru Zitox, Ziride Dosage : 3-4 gram/litre of water (Spray fluid 500 litre/ha) , Chemical class: Dimethyl Dithiocarbamate , Remarks: Control of leaf spot and blight diseases