Recent surveys have found that many greenhouse tomatoes often appear hormonal poisoning phenomenon, the specific performance of tomatoes in the greenhouse is very weak, stalks are weak, jointing is very long, leaf curling, deformity, severe form of fern leaves, distortion, or even linear . Some are very similar to those caused by viruses and locusts, resulting in incorrect identification and failing to take effective measures to bring serious losses to tomato production. Beauty Tools,Best Beauty Tools,Beauty Care Tools,Hair Straightening Comb Shenzhen Jie Zhong Lian Investment Co., Ltd. , https://www.meizons.com
First, the cause of the analysis
First of all, we need to distinguish between the symptoms of hormonal intoxication, viruses, and the incidence of locusts, and the rules of the disease, so that correct response measures can be taken. Viral disease has obvious episodes of disease. It usually does not occur as a whole. The diseased plants have yellow leaves, which are either linear or almost linear. The growth of the plants is almost stagnant. When the fleas are damaged, the leaves become hard and the back of the leaves are oily and mainly concentrated in the plants. The young part of the body can be observed with a magnifying glass or a microscope. Obviously, the phenomenon of hormonal poisoning has no apparent center of disease. It usually occurs in patches, and there is a tendency from heavy to light in the field.
The problem of hormone poisoning in tomato cultivation is mainly due to the widespread use of plant growth regulators for flower protection and fruit protection, or the use of growth inhibitors such as paclobutrazol, chlorophyll, etc. to control the disease, resulting in massive accumulation of hormones in tomato plants; excessive use of plants Rooting fertilizers or water soluble fertilizers of growth regulators lead to hormonal intoxication; excessive use of pesticides or herbicide drifting outside the shed is also an important cause of leaf deformities.
Second, preventive measures
1. Strengthen cultivation management. Choose a tomato variety that is suitable for local planting and has strong resistance, and cultivate robust plants. At the same time, we should pay attention to the rational use of herbicides and pay attention to the use of herbicides around the shed to prevent damage to the leaves caused by herbicide drift.
2. Reasonably use anthers. According to weather conditions, flowering habits, plant growth and other factors, the concentration of point anthers should be reasonably determined. Under normal circumstances, the concentration used at high temperatures should be lower, and the concentration ratio at low temperatures should be slightly larger; at the same time, it should be based on different plants. The growth will be adjusted, the growth will be strong, the drug concentration should be large, the growth is weak, and the concentration should be smaller; the pigment should be added as a mark in the liquid to avoid repeated flowering; at the same time, attention should be paid to the normative operation, and try to use the index finger and middle finger to clamp The main stalk of the main inflorescence, to reduce the hormonal poisoning caused by the drift of the leaves or growth points, should pay attention to the current use, while the first trial, no problem when a large area of ​​use.
3. Reduce the use of products such as hormones. To use paclobutrazol and other plant growth regulators in an appropriate amount, and at the same time when selecting fertilizers and other products, the products of regular manufacturers should be selected to prevent the abuse of hormone products.