Healthy

  • Symptoms

  • Trigger

  • Biological Control

  • Chemical Control

  • Preventive Measures

Healthy

Healthy

Other


In a Nutshell

  • On the whole plants are good at keeping themselves healthy.
  • Disease in the strict sense of the word happens when 1) a pathogen (like a fungus, bacterium, or virus) is present, 2) the plant is susceptible to this pathogen and 3) the environmental conditions are unfavorable for the plant.

Hosts

Additional

Almond

Apple

Apricot

Banana

Barley

Bean

Blackberries

Blueberry

Cabbage

Cacao

Canola

Capsicum & Chili

Carrots

Cashew

Chard

Cherry

Chickpea, Gram

Citrus

Coffee

Cotton

Cucumber

Currant

Eggplant

Fig

Garlic

Gooseberry

Grape

Leek

Lentil

Lettuce

Maize

Mango

Manioc

Melon

Millet

Mung bean

Oat

Okra

Olive

Onion

Papaya

Pea

Peach

Peanut

Pear

Pineapple

Plum

Pomegranate

Potato

Pumpkin

Quince

Radish

Raspberry

Red gram, Pigeonpea

Rice

Rose

Rye

Sorghum

Soybean

Spinach

Strawberry

Sugar beet

Sugarcane

Sweet potato

Tomato

Triticale

Turnip

Wheat

Zucchini

Symptoms

On the whole plants are good at keeping themselves healthy. Disease in the strict sense of the word happens when a pathogen (like a fungus, bacterium, virus) is present on the plant or in the soil and the environmental conditions are unfavorable for the plant (too much humidity, drought, stress). Moreover, the plant has to be susceptible to this particular pathogen for the symptoms to develop. If any one of these things is not present (susceptibility in the plant, pathogen and unsuitable environment), the disease will not happen. Other disruptors of plant health are physiological disorders deriving from stresses such as drought or nutrient deficiency. Finally, pests can also damage crops and impair their growth, thus reducing yields.

Trigger

To grow your plants healthy, you have to provide them with appropriate amounts of water, nutrients, and the proper environmental conditions. Moreover, a good soil organic content and optimal pH are necessary in some cases to secure your harvest. Make sure to know how much sunlight and space your plants need before planting and which soils they prefer. Prevention of disease involves mainly the avoidance of stressful conditions for the plant. This requires good management practices in the field during the growing season.

Biological Control

Balanced fertilization, appropriate water supply and the organic carbon content in the soil are important to keep the plant healthy. In case of disease, biological treatments usually include insecticidal soaps, neem extract, formulations containing the bacteria Bacillus thurigiensis or fungi of the genus Trichoderma, as well as Spinosad. Other formulations accepted in organic farming are copper or sulfur-based fungicides, for example. Finally beneficial insects can be promoted or introduced to reduce the population of a pest.

Chemical Control

No chemical control needed!

Preventive Measures

Buy your planting material from certified sources. Examine the transplants carefully before buying them. Plant crops with sufficient spacing to allow for good ventilation. Choose the site (soil, weather) carefully and make sure not to sow susceptible varieties. Fertilize with the right fertilizer mixture and the balanced nutrient supply. Do not over-water or over-fertilize. Do not touch healthy plants after touching infected plants. Avoid extreme temperature changes. Maintain a high number of different varieties of plants around fields. If treating against a plague, use specific products that do not affect beneficial insects. Removed diseased leaves, fruit or branches at the right time during the growing season. In the fall, clean up plant debris from the field or orchard and burn them.