How Too Much Heat Can Damage Vegetables and Other Crops

Though our crop plants need adequate sunlight, they can only take so much heat. The plant tissues die normally around 115°F. The plant temperature is just usually above air temperature. But in certain conditions, plant temperature can rise to the critical level.

Plants, in general, have three major ways to remove excess heat.
1. Through long wave radiation
2. Through heat convection into the air
3. Through transpiration

If either any of these major ways are interrupted, plant temperature can rise above the normal.

For instance, transpiration can be interrupted by inadequate water, injury, vascular plugging, and stomatal closure. When that happens, the major cooling mechanism of the plant is lost.

Take note that dry soil conditions can also lead to excess plant heating. When the soils are dry, roots produce ABA or Abscisic Acid. This acid is transported to leaves which signals stomatal closure.

How to protect your crops from heat damage:

  1. Overhead watering is the major method to reduce plant heat stress. Always make sure that you have sprinklers set up and you provide adequate water supply.
  2. Misting also helps in improving your plant’s temperature. It helps in lessening water vapor pressure deficit.
  3. You can also increase dissipation and reflection of radiative heat using reflective mulches.
  4. Low density and organic mulches like straw can also be used to conserve moisture and reduce surface radiation.
  5. If you are located in very hot areas, use shade cloth for partial shading. This will help in reducing heat and radiation.

Pesticides: How You Can Possibly Bring Food Borne Diseases to Your Home

Eating organic isn’t enough to stay healthy. No matter how much you try to stay away from chemicals, the fact is, they’re everywhere. It’s in your barbecue, your favorite chips, your hamburger, and even on your healthy salad.

Food handling and preparation play a very important role in making sure that what you’re eating is clean and safe. Before eating raw fruits and vegetables, it’s important to wash them properly to get rid of pesticides and any other chemicals.

According to research, petroleum based chemicals used in pesticides, consumer products, and job environments are linked to some health disorders. In fact, they are found to cause accelerated aging to the brain, blood brain barrier, and immune system. It’s also proven that these chemicals can also alter critical hormones that are necessary for teenage behavioral and neurological development.

Illnesses identified in the medical research include adult and child cancers, numerous neurological disorders, immune system weakening, autoimmune disorders, asthma, allergies, infertility, miscarriage, and child behavior disorders including learning disabilities, mental retardation, hyperactivity ADHD (attention deficit disorders) as well as altering hormones essential for maintaining healthy bodily processes. Petroleum based chemicals are believed to cause these problems by a variety of routes including – impairing proper DNA (Gene) expression, weakening DNA Repair, accelerating gene loss, degeneration of the body’s detoxification defenses (liver and kidneys) as well as gradual weakening of the brain’s primary defense (the Blood Brain Barrier).

Know more about the research here.