🌼 Causes of Flower Abortion in Plants Flower abortion is the premature shedding or failure of flowers before fruit formation. It negatively affects yield and is influenced by internal (physiological) and external (environmental or biotic) factors. 🔍 Main Causes of Flower Abortion: 1. Nutrient Deficiency Lack of essential nutrients (e.g., Nitrogen, Phosphorus, Boron, Calcium) weakens flower development. Boron deficiency is a major cause of poor pollen viability. 2. Water Stress (Drought or Excess Water) Water shortage leads to wilting and flower drop. Waterlogging can cause oxygen deficiency, leading to flower abortion. 3. Temperature Extremes High temperature affects pollen viability. Low temperature may delay or damage floral organs. 4. Hormonal Imbalance Imbalance of auxins, gibberellins, ethylene, and cytokinins can disrupt flower retention. High ethylene levels often cause flower drop. 5. Poor Pollination or Fertilization Lack of pollinators, incompatible pollen, or environmental hindrance to pollen tube growth leads to failure in fertilization. This causes flowers to abort naturally. 6. Pest and Disease Attack Insects like thrips, aphids, and diseases like powdery mildew damage flowers. Affected flowers may abort before setting fruit. 7. Genetic or Physiological Limitations Some varieties naturally shed excess flowers to adjust fruit load. Internal competition between developing flowers/fruits. 8. Heavy Fruit Load or Resource Limitation When too many fruits set, plants may abort new flowers due to limited carbohydrates or nutrients. 9. Chemical Exposure or Herbicide Injury Use of wrong chemicals during flowering stage may interfere with reproductive processes. 📌 Summary (In 3 Lines): Flower abortion occurs due to nutrient deficiencies, environmental stress (heat, drought), hormonal imbalances, or poor pollination. Biotic factors like pests and diseases also contribute. Managing nutrition, water, and pest control can reduce abortion and improve yield.
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Important and often overlooked topic! Really appreciate how you’re breaking it down for everyone to learn and benefit