A digital refractometer is an instrument used to measure the refractive index of a substance. It works by shining a beam of light through a sample and measuring the angle at which the light is bent. The refractive index is then calculated based on this angle and the properties of the material being measured. Digital refractometers are commonly used in the food and beverage industry to measure the sugar content of liquids such as fruit juices and wine. They are also used in the automotive and chemical industries to measure the concentration of various fluids. Digital refractometers offer the advantage of being more accurate and easier to read than traditional analog refractometers. Digital Refractometer,Auto Digital Refractometer,Auto Portable Refractometer,Portable Automatic Refractometer Lachoi Scientific Instrument (Shaoxing) Co., Ltd. , https://www.lachoinst.com
Insecticide contraindications need to understand
Insecticides are typically highly toxic, and their application varies depending on the crop type, growing season, pest life stage, and target pests. This variability leads to a wide range of pesticides available in the market. However, improper use can result in phytotoxicity, which is harmful to plants. Each pesticide comes with specific contraindications that must be carefully followed to avoid damaging crops.
Chlorpyrifos is one of the most commonly used insecticides. It should not be applied during the seedling or flowering stages of certain crops, as it can cause phytotoxic effects. Similarly, triazophos is not recommended for use on fruit trees or sugarcane, as it may lead to plant damage.
Phoxim insecticides are sensitive to light and tend to break down quickly when exposed to it. Therefore, they should not be used during the early growth stages of radishes, leafy vegetables, or watermelons. Spraying on other crops should also be avoided during bright sunlight hours, as this can significantly reduce the effectiveness of the treatment.
Oxygen and dimethoate insecticides should be used with caution on certain crops such as sorghum, mat grass, tobacco, jujube, peaches, plums, apricots, cherries, citrus, and olives. High concentrations of these insecticides can lead to phytotoxicity, especially in sensitive plant varieties.
Insecticides containing trichlorfon, dichlorvos, and dibromophosphonate are particularly harmful to young corn, bean, and melon seedlings. They can also cause phytotoxicity when used on sorghum, making it important to follow label instructions carefully.
The Pesticide Network reminds users that certain insecticides, including those used against cotton, beans, and potatoes, should be applied with care to prevent phytotoxicity. During the hot summer months, cruciferous crops like broccoli and cabbage are more vulnerable to chemical damage, so extra precautions are necessary to protect them from adverse effects. Always read and follow the manufacturer’s guidelines to ensure safe and effective use.