In agricultural production, people often confuse crop phytotoxicity and disease, and what is the difference between crop phytotoxicity and physiological disease? This issue is shared with you in the China Pesticide Network .
Pesticide phytotoxicity occurs when phytotoxicity occurs due to improper use of pesticides; plant physiological diseases are natural disasters, which are caused by plant dysplasia, withering or death, usually by bacteria, fungi, viruses, algae or unsuitable Caused by factors such as climate and soil.
First of all, the pesticides Xiaobian, for you to summarize common pesticide phytotoxicity: such as improper spraying of butachlor in the early stage of rice field, irregular brown spots in the rice leaves; rice is affected by the action of metformin The glyphosate physiology of rice seedlings can cause dead plants of dead yellow; the use of green mellon in rapeseed is not good, showing growth retardation and branching reduction; Bordeaux mixture can cause apples to fall and fall; watermelon is affected by ethephon , melon Dark red, smelly, etc.
Next, the pesticide network Xiaobian summarizes for you, "What is the difference between crop phytotoxics and physiological diseases?"
1. The distribution of spots caused by phytotoxicity is often irregular in the plant, and the whole field is light and heavy. The spots caused by physiological diseases are usually common, and the symptoms of the plants are also consistent. Spot-type phytotoxicity and fungal diseases are also different. The former has a large change in spot size and shape; while the latter has a disease center and the spot shape is relatively uniform.
2. The difference between the malformation caused by phytotoxicity and the malformation of viral disease is that the former is common and shows local symptoms on the plant; the latter often has sporadic incidence, showing systemic symptoms, often mixed with broken green veins and wrinkles And other symptoms.
3. The wilting caused by phytotoxicity is compared with the wilting symptoms caused by the invasive disease. The former has no morbidity center, and most of them have slow process, first yellowing, post-dead strain, no browning of rhizome, and the latter is rhizome The tube bundle is blocked. When the sunlight is irradiated and the amount of evaporation is large, the first wilting occurs, and then the green dead seedlings are lost, and the rhizome ducts often have browning.
4. Compared with the yellowing caused by lack of nutrients, the yellowing caused by phytotoxicity often develops into yellow leaves from yellow leaves, with more sunny days, yellowing is faster, more rainy days, and yellowing is slower. The latter is often associated with soil fertility, and the whole plot of yellow seedlings is consistent. Compared with the yellowing caused by the virus, the yellow leaves of the latter often have a greenish appearance, and the diseased plants exhibit systemic symptoms, which are mixed with healthy plants in the field.
5. Infertility caused by phytotoxicity is different from infertility caused by climatic factors. The former is a whole plant infertility, sometimes it is partially strong, but mixed with other phytotoxicity symptoms; and the climate-induced infertility has no other symptoms, and very few There is a phenomenon of whole plant infertility.
6. Falling leaves, falling flowers, falling fruits caused by phytotoxicity are different from deciduous, falling flowers and falling fruits caused by atmospheric or cultivation factors. The former is often accompanied by other phytotoxicity symptoms, such as yellowing, dry coke, and then falling leaves. The latter is often associated with severe weather and often occurs during high winds, heavy rains, and high temperatures. The cultivation factors are mainly caused by lack of fertilizer or excessive growth, which causes falling flowers and falling fruits.
7. The slow growth caused by phytotoxicity is compared with the stiffness and deficiency of physiological diseases. The former is often accompanied by symptoms of plaque or other phytotoxicity, while the latter is characterized by poor growth of roots and stiffness of deficiency. It is characterized by yellow or dark green leaves.
Regarding " what is different between crop phytotoxicity and physiological diseases ", the pesticide network Xiaobian will summarize it for you here. For more pesticide information, please pay attention to China's pesticide network!
SZYOUMY- A professional team on Amazon more than 13 year. We commit ourselves to design best light, give the best customer experience and after-sales service to all customers.
Aluminum lamp body, durable, one die-casting molding, the details determine the quality. New LED technology, LED light bulb which is bright, No Flicker, No Strobe.(Bulb CANNOT be replaced)
3000K 2700K 4000K warm white light will give a harmonious and elegant feeling for your family. Modern and simple wall lamp. It may not be bright enough to be a main light, but it will be really nice decoration, even can be a night light.
Environmental Protection - High quality LED COB lamp, high efficiency, energy saving and Environmental protection.
Safety - Long-Lifespan LED Driver, with short-circuit protection. Shine beautifully for your house
Product Details:
Type: modern, minimalist wall lamps
Application best for living room, bedroom, staircase, balcony, bar kitchen, nursery, study, office, restaurants, hotels, shop, cafe, etc.
Led Wall Light,Adjustable Wall Light,Aluminum Wall Light,Waterproof Led Wall Lighting
Shenzhen You&My Electronic Technology Co., Ltd , https://www.youmyledlight.com