Physiological defects in cabbage

 Common Physiological Defects in Cabbage: Causes and Solutions 

1-Tip burn:

The internal tip burn of cabbage (Brassica oleracea var. capitata) is a significant quality issue. The discoloring and desiccation of inner head leaves can render entire crops worthless. This condition, often attributed to a regional calcium shortage, is a crucial area of our research.

The shortage is not caused by decreased calcium supply to the plant but rather by calcium transport characteristics inside the plant. 

Because the inner head leaves of the cabbage plant lack transpiration, calcium is transferred to the meristematic tissues in the head, predominantly through root pressure flow or because of meristematic sink activity during the night. 

High growth rates are known to enhance the occurrence of internal tip burn. Because of the higher need for calcium per unit of time, the impact of an interruption in calcium transport to the cranium is probably more catastrophic. 

Conditions of equal transpiration between day and night, whether high or low, diminish root pressure flow to the head and may promote internal tip burn formation.

A combination of high growth rates and low root pressure flow during prolonged dry, sunny weather with high transpiration rates during the day and night may induce internal tip burn because of insufficient calcium influx into the cabbage head under such conditions. 

As the commencement of calcium deficit in developing tissue is a subcellular process, apparent signs of internal tip burn may be exhibited only later. 

Our research is paving the way for developing recommendations to reduce the incidence of internal tip burns. This could significantly impact the agricultural industry, providing hope for a future with fewer crop losses.

2-Hollow stem:

During rapid development, cabbage, cauliflower, and broccoli experience the hollow leg phenomenon. The inner bark tissue in the plant's stem or core (the inner stem with the head) appears to have collapsed and split, and holes have appeared in it. Signs of infection can only be detected after the head is removed. 

Infection occurs when a high-nitrogen fertilizer is present under conditions promoting rapid growth, such as a moderate temperature rise and increased distance between plants.

 A cavity may appear in the tissues of the leg when the boron element is insufficient, but in this case, it is accompanied by a greyish tint in the affected tissues.

3-Bursting:

Cabbage heads may split (or explode) before harvest, destroying their market value. This occurs when fertilization rates are high, particularly nitrogen, irregular watering, excessive watering after heads have grown, or delays in harvesting. The damage is higher in spherical differences than in other shapes.

FAQs on Physiological Defects in Cabbage

Can physiological defects be prevented through organic farming methods?

Organic farming practices, such as crop rotation and natural pest control, can significantly reduce the risk of physiological defects.

How can I identify nutrient deficiencies in my cabbage crop?

Regular soil testing and plant observation are critical. Yellowing leaves, stunted growth, or unusual discoloration may indicate nutrient deficiencies.

Is it advisable to use synthetic pesticides for pest control in cabbage cultivation?

While effective, synthetic pesticides can leave residues. Opting for organic alternatives is recommended to ensure food safety.

Can physiological defects be reversed once identified?

Sometimes, timely interventions, such as adjusting soil pH or providing proper nutrients, can reverse physiological defects, but prevention is the best strategy.

Are there cabbage varieties more resistant to physiological defects?

Yes, certain cabbage varieties are bred for resilience. Consult with local agricultural extension services for recommendations based on your region.

What role does crop rotation play in preventing cabbage defects?

Crop rotation helps break pest and disease cycles, reducing the likelihood of physiological defects. It's a sustainable practice for cabbage cultivation.