There is no doubt that the biggest challenges of any farmer are weeds competing with crops for space, light and nutrients, and insects engulfing harvests like wildfire. Effective pesticides (insecticides, herbicides and fungicides) are therefore miraculous inventions in the eyes of many farmers. They dramatically lower costs by saving time and energy, and most importantly, enable farmers to avoid numerous problems. Humans are known to be visual … Continue reading Unravelling the Secrets of Pesticides
Written By Lau Hoi Lung. Translated by Angeline Chan. Soaring property prices, shortage of elderly homes, lack of places for people to enjoy intimate relationships – it seems as though no social problem in Hong Kong is far removed from land issues. The government keeps banging on about limited land supply, lending credence to the saying “Hong Kong is a densely populated city”. Studies on … Continue reading DO WE KNOW OUR SOIL?
Can you guess which one is organic? Read on to find out
Many people exhibit a sudden interest in organic food when they or someone in their family has been afflicted with cancer. Are they just grasping for links or is there any factual basis for their concern that the way modern food is grown can contribute to cancer? Let’s review how conventional leafy green vegetables, such as Choi Sum or Bak Choi, are typically grown in Hong Kong. All the chemicals listed below are approved and readily available for sale in Hong Kong.
Prior to growing a new crop, conventional chemical farmers spray a broad-spectrum systemic herbicide, such as Glyphosate, to kill weeds in the soil. “Broad-spectrum” means that it is effective against a wide a variety of plants – it is toxic not only to the weeds but also to the vegetables that will subsequently be planted. However, it’s concentration will have been diminished by the time the vegetables are planted. The residual toxicity will still weaken the vegetable. A weaker plant is more susceptible to pests and disease. As such, farmers need to apply higher quantities of pesticide later on to protect the crop from insect attacks.