integrated disease management

 

Plant Protection

Diseases are the most important production constraints, which limits the successful cultivation of beans. Among the diseases, rust has become epidemic in bean growing areas.

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  1. Seed treatment carbedazim or captaf@ 2g/kg seeds.

  2. Foliar application of Diclorovos(0.1%) for stem fly infection at the time of seedling emergence.

  3. Foliar application of Carbendazim (0.1%) or Tricyclazole (0.06%) to control root rot cause by Rhizoctonia solani.

  4. Drenching infected plants with Carbendazim (0.1%) or Copper oxychloride (0.3%) when root rot is observed.

  5. Foliar application of Carbendazim (0.1%) or Thiophanate methyl (0.1%) to control anthracnose (need based).

  6. Spray Chlorothalonil (0.2%), Bitertanol (0.1%) Triadimefon (0.1%), Propiconozole (0.025%) or Tridemorph(0.1) for management of rust disease

  7. Spraying Streptocycline (0.03%), Copperpper hydroxide (0.2%) for the management of bacterial leaf blight of beans.

  8. Foliar spray of Acephate (0.15%), followed by spray of Imidacloprid (0.033 %) or Metasystox (0.05%) or Dimethoate (0.2%) is effective for bean golden mosaic virus disease.

integrated pest management

Foliar spray of Acephate (0.15%), followed by spray of Imidacloprid (0.033 %) or Metasystox (0.05%) or Dimethoate (0.2%) is effective for bean golden mosaic virus disease.

Insect Pests: Stem fly, leaf miner, thrips and red spider mites attacking french bean.

  1. Monitor the plants for stem fly adult activities, puncture marks and petiole mining soon after germination As soon as a few adults of stem fly(small housefly like insects) are noticed hovering over the crop, spray endosulfan 35 EC @ 2ml/l or acephate 75 WP @ 0.75 g/l or Neem seed powder extract (4% ) or neem soap (1%) or neem formulation with 10000 ppm azadirachtin (2 ml/l). However, please note that the botanicals get washed away by rain and they will be ineffective if it rains within 1-2 days of spray.

  2. Second spraying is given when on an average 5 leaves/10 leaves  have petiole mining symptoms or at 15 days after sowing. This will also take care of leaf miner. For leaf miner, donot repeat sprays again and again, as it will increase pest population.

  3. For thrips spray dimethoate (2ml/l) or lamda cyhalothrin (1 ml/l)

  4. For mites spray acaricide like dicofol (1.5 ml/l) or wetable sulphur (2.5 gm/l) mixed with neem soap (0.75%) or pongamia soap (0.75%). Spray underside of the leaves thoroughly.

  5. During September - October months after the onset of North East monsoon hoppers become very serious causing withering of the foliage and plants. The pest can be controlled by spraying Neem Seed Powder extract 4 % or neem soap (1%) at weekly interval.