jump directly to content.
Principles. Crops. Pests. Control methods Library. Links.
key visual: online information service for Non-chemical Pest Management in the Tropics

String beans

Common name: Common beans, Green beans, Pole beans, Snap beans
Scientific name: Phaseolus vulgaris
Family: Fabaceae

Growth stages 

 

Pests 

For weeds and diseases please see further down on this page. For rodents, snails and slugs please click here 

Seed

 
Sown seeds  Ants

Seedling Stage

 
Stem   Bean fly
Cutworm
Seedcorn maggot

Vegetative Stage

 
Stems  Bean fly
Corn stalk borer
Leaves  Aphids
Armyworm
Cabbage looper
Corn earworm
Leaf miner
Spider mites
Thrips
Whitefly

Reproductive Stage

 
Flowers  Aphids
Armyworm
Corn earworm
Leaf miner
Spider mites
Thrips
Whitefly

Maturation stage

 
Pods, Beans   Armyworm
Cabbage looper
Corn earworm
Lygus bugs
Stink bug

Weeds

Grasses
Sedges
Broadleaf

Diseases

Fungal
Bacterial
Viral

Agro-ecology

String beans are harvested as snap (bush) or green (pole or climbers) beans. Bush beans are non-climbing plants while pole beans are staked, trained, and or with trellis. Root rot organisms and bacterial diseases often build-up in soil when snap beans are planted repeatedly in the same field. Crop rotation is necessary to limit disease. Corn and other small grains are good rotation crops (Larson; Mossler; Nesheim, 1997).

Fields should be well-aerated and well-drained. Populations of pathogens and pests build-up quickly, in poorly drained soil. Practice shallow tillage prior to flowering to prevent damage to roots and plant collars. Damaged ground plant parts encourage soil borne diseases (Pernezny, 1997).

To control white mold, the planting distance of snap beans should be closer in between rows and wider spacing in between hills (Hochmuth; Cordasco, 1997).

Plant seeds that are found to be resistant to soil borne pathogens. Healthy plants are less likely to be affected by diseases and attacked by pests. Excess N levels make the plants susceptible to bacterial disease and lack of soil nutrients make the plants susceptible to Alternaria leaf spot. When diseases are observed in the field, workers should not move within fields when plants are wet. Disease organisms spread relatively fast when there is moisture on the leaves (Pernezny, 1997).

OISAT Field Guides

Field Guide to Non- chemical Pest Management in String bean Production download (762 kb)


External links


References


 to the top        PAN Germany, OISAT; Email oisat@pan-germany.org