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Good agricultural practices for bitter gourd, Crop protection: Diseases & their management

Posted by Sanjeeva Reddy on

                          Diseases of bitter gourds

Bitter gourd crop its life cycle is invaded by different diseases caused by pathogenic microorganisms. Starting from bitter gourd seeds put into soil the diseases may invade bitter gourd crop.
1. Anthracnose caused by Colletotrichum gloesporioides

The symptoms first appear on the foliage as small, yellowish water-soaked areas which later turn dark and dry.

                         Anthracnose disease on bitter gourd

Control Anthracnose

Dithane M -45 [Mancozeb ] 2 gm/ L or  Sanipeb [Propineb] 2 gm/L OR  Bengard [Carbendazim] 2 gm/ L  OR Ridomil gold 80 WP [Metalaxyl + Mancozeb] OR Avtar [Zineb 68% + Hexaconazol 4% WP] 2 g/litre OR Blitox [Copper Oxy Chloride] 2 g/litre or Kocide [Copper hydroxide] – 2 g/litre

                      Spray to control fungal leaf spot, stem rot and Anthracnose diseases in gourd crops  available on Bighaat

 

2. Damping-off caused by Oomycete (Pythium spp.)
Affected seedlings fail to emerge or collapse shortly after emergence. Water soaked lesions also appear on the seedlings at the soil level.

                             Damping off on bitter Gourd plants

Drench with Ridomet 0.75 gm/L + Humesol 3 mL/L+ Plantomycin 0.5 gm/L of water and drench about 50 – 150 mL per plant based on size of the plants.

             Treatment for Damping off Disease in gourd crops

3. Downy mildew Caused by Pseudoperonospora cubensis

The underside of leaves develop a downy white to gray mold, which may turn grey to purple during wet weather. Spores develop to mold.

                 Downy mildew in bitter gourd

  1. Kavach 2 gm/L + Ampoxcillin 1 gm/L

and after a week

  1. Ridomil gold 2 gm/L + Kitoguard 2 mL/L 

          Spray to control downy mildew disease in gourd crops  available on Bighaat

 

  4. Powdery mildew caused by Podosphaera xanthii 

Powdery mildew is a serious and common fungal disease during warm and humid conditions with overcast days.

               Powdery mildew on bitter gourd

For control Powdery mildew

Nativo [Tebuconazole+Trifloxystrobin] 0.5 gm/L OR Vespa [Propiconazole+ Difenoconazole1 mL/L OR Custodia [Azoxystrobin + Tebuconazole] 1 mL/L OR Contaf plus [Hexaconazole] 2 mL/L

         Spray to control powdery mildew disease in gourd crops  available on Bighaat

5. Angular leaf spot on bitter gourd 

Bacteria leaf spot or Angular leaf spot is a bacterial disease caused by Pseudomonas syringae.

                             Angular leaf spot caused by bacteria

For control angular leaf spot on bitter gourd 

Borogold or Kavach [Chlorothalonil] 2 gm/L OR Kocide [Copper hydroxide] – 2 g/litre + Plantomycin 0.5 gm/L.

                           

       Spray to control bacterial leaf spot  or angular leaf spot disease in bitter gourd

Several biological agents can be used to control the fungal and bacterial diseases like

 Ecoderma or Nisarga [TRICHODERMA VIRIDE] and Ecomonas PSEUDOMONAS FLUORESCENS 10 to 15 gm/L for spray and 20-25 gm per litres for drenching to control wilts.

                             Biological agents for disease control in bitter gourd crops available in Bighaat1

Viral Diseases

Viral diseases are among the major limiting production factors for cucumber production in tropical areas. Typical symptoms include green and yellow mottling and wrinkling of the leaves, mottling and wartiness of the fruit, and general dwarfing of the plant.

   Viral infections on bitter gourd crops

Bitter gourd Yellow Mosaic Virus (BGYMV) is a Whitefly transmitted gemini virus is common viral nfection.

Symptoms include yellow leaves with mosaic and a distorted appearance. The whole plant is stunted. Affected fruit is also misshapen.

Management of Viral diseases

  • Thoroughly screen the nursery bed for the infected seedlings and rogue them carefully and transplant only healthy seedlings and remove the diseased plants in the main field.
  • Spray with insecticides to check the sucking pests such as White flies, Aphids and Thrips which are transmitters of the viral disease.
  • Weeds should be removed which may act as an additional host.

Spray should be concentrated more on apical parts of the plants since vectors only thrive at apical parts of the plant.

Ammoniacal nitrogen has also positive advantage for viral infections so take care of quantity of ammoniacal nitrogen application.

Following sprays may be done to manage

First  spray: Viral out 2 gm/L+ Magnum Mn 0.5 gm/l + Phytozyme 1 mL/L+ Econeem plus 1 %- 1 mL/L

 Viral diseases management in bitter gourd

after 10 days: V-Bind 2 mL/L + Multimax 3 gm/L + Econeem plus 1 % - 1 mL/L

     Viral diseases management in bitter gourds

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For more information kindly call on 8050797979 or give missed call on 180030002434 during office hours 10 AM to 5 PM

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Disclaimer: The performance of the product (s) is subject to usage as per manufacturer guidelines. Read enclosed leaflet of the product(s) carefully before use. The use of this product(s)/ information is at the discretion of user.

   


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