Raspberries - Wilting
Symptoms
Dark green coloration of medium and young foliage. Wilting and leaf scorch starting from marginal and interveinal areas of older leaves. Poor branching. Reduced flowering and fruit set, worse fruit quality.
Causes
Phosphorus deficiency (right)
Berries tend to have a low demand for P relative to other crops. Normal leaf level is 0.2-0.6% dry weight. Availibility may be reduced by unfavourable soil conditions such as extremes in pH, temperature or moisture, as well as excessive Ca and Al. Soils with a large quantity of clay will fix more P than lighter soils.
Raspberries - Wilting
Symptoms
Dark green coloration of medium and young foliage. Wilting and leaf scorch starting from marginal and interveinal areas of older leaves. Poor branching. Reduced flowering and fruit set, worse fruit quality.
Causes
Phosphorus deficiency
Berries tend to have a low demand for P relative to other crops. Normal leaf level is 0.2-0.6% dry weight. Availibility may be reduced by unfavourable soil conditions such as extremes in pH, temperature or moisture, as well as excessive Ca and Al. Soils with a large quantity of clay will fix more P than lighter soils.
Raspberries - Wilting
Symptoms
Dark green coloration of medium and young foliage. Wilting and leaf scorch starting from marginal and interveinal areas of older leaves. Poor branching. Reduced flowering and fruit set, worse fruit quality.
Causes
Phosphorus deficiency
Berries tend to have a low demand for P relative to other crops. Normal leaf level is 0.2-0.6% dry weight. Availibility may be reduced by unfavourable soil conditions such as extremes in pH, temperature or moisture, as well as excessive Ca and Al. Soils with a large quantity of clay will fix more P than lighter soils.
Raspberries - Wilting
Symptoms
Dark green coloration of medium and young foliage. Wilting and leaf scorch starting from marginal and interveinal areas of older leaves. Poor branching. Reduced flowering and fruit set, worse fruit quality.
Causes
Phosphorus deficiency
Berries tend to have a low demand for P relative to other crops. Normal leaf level is 0.2-0.6% dry weight. Availibility may be reduced by unfavourable soil conditions such as extremes in pH, temperature or moisture, as well as excessive Ca and Al. Soils with a large quantity of clay will fix more P than lighter soils.
Raspberries - Wilting
Symptoms
Dark green coloration of medium and young foliage. Wilting and leaf scorch starting from marginal and interveinal areas of older leaves. Poor branching. Reduced flowering and fruit set, worse fruit quality.
Causes
Phosphorus deficiency
Berries tend to have a low demand for P relative to other crops. Normal leaf level is 0.2-0.6% dry weight. Availibility may be reduced by unfavourable soil conditions such as extremes in pH, temperature or moisture, as well as excessive Ca and Al. Soils with a large quantity of clay will fix more P than lighter soils.
Raspberries - Necrosis
Symptoms
Dark green coloration of medium and young foliage. Wilting and leaf scorch starting from marginal and interveinal areas of older leaves. Poor branching. Reduced flowering and fruit set, worse fruit quality.
Causes
Phosphorus deficiency
Berries tend to have a low demand for P relative to other crops. Normal leaf level is 0.2-0.6% dry weight. Availibility may be reduced by unfavourable soil conditions such as extremes in pH, temperature or moisture, as well as excessive Ca and Al. Soils with a large quantity of clay will fix more P than lighter soils.
Raspberries - Necrosis
Symptoms
Dark green coloration of medium and young foliage. Wilting and leaf scorch starting from marginal and interveinal areas of older leaves. Poor branching. Reduced flowering and fruit set, worse fruit quality.
Causes
Phosphorus deficiency
Berries tend to have a low demand for P relative to other crops. Normal leaf level is 0.2-0.6% dry weight. Availibility may be reduced by unfavourable soil conditions such as extremes in pH, temperature or moisture, as well as excessive Ca and Al. Soils with a large quantity of clay will fix more P than lighter soils.
Phosphorus deficiency vs. healthy plant made worse by
- Acidic or very alkaline (calcareaus) soils
- Low organic matter
- Cold or wet conditions
- Crops with a poorly developed root system
- Soils with low P reserves
- Soils with a high phosphate capacity
- Iron rich soils
Phosphorus is important for
- Stronger plants, healthier plants with more resistance to cold weather
- Bigger bolder berries
- Improves efficiency of fungicide sprays
- Reduces incidence of botrytis
- Firmer berries with better storage potential
- Increases shelf life
Yara recommended fertilisers for Phosphorus deficiency
YaraVita FOLIAR POTASH
Raspberry: 5 l/ha at green bud. Water rate: 200-500 l/ha.
Read more about YaraVita FOLIAR POTASH
