How to reduce Tomato yield and Control Tomato Hollow Fruit

Tomato hollow fruit refers to the hole between pericarp and pulp gelatin. there are three common types: placenta dysplasia, pericarp septum is very thin, no seeds can be seen; varieties with fast growth in pericarp septum and few ventricles are easy to see high node inflorescence; pericarp grows rapidly, placenta development can not keep up with tomato hollow fruit.

Tomato hollow fruit

Etiology: in the case of low temperature, tomato root system, low vitality, poor water absorption, so that the tomato young fruit is in the expansion period, in the case of short-term water shortage, it is easy to appear hollow fruit. In the low temperature season, watering in the facility lowers the temperature, which can easily lead to the occurrence of hollow nuts. When the temperature is too low, even if the spray agent is used, although the fruit sits, the absorption capacity of the root system is poor, and the nutrition supply is insufficient, which leads to the tomato can not develop normally, can not enrich and expand, and form hollow fruit. The concentration of flower dipping agent is too high, resulting in rapid expansion of tomato, placenta development rate can not keep up, there will be hollow fruit. Tomato varieties that require a large amount of fertilizer, especially the large fruit shape, appear hollow if they do not get sufficient fertilizer and water supply during the tomato expansion period. In addition, if the temperature is too high at night and too much nitrogen fertilizer, it will also lead to the production of hollow fruits.

Prevention and control methods: strengthen the management of water and fertilizer. Tomato irrigation in low temperature season must be increased by more than 10 ℃ in advance, and a storage tank can be built in the facility to temporarily store irrigation water to facilitate heating. Under the premise of ensuring normal growth, it is mainly to control water. Before flowering, the soil moisture should be maintained at 6% 575%, and the soil moisture should be kept moist during the fruiting period. The soil water content should be between 75% and 85%.

Generally, when the tomato grows to the size of a walnut, it can be watered and fertilized. Bio-organic fertilizer or compound fertilizer can be applied along with the water, and single nitrogen fertilizer is prohibited. It is necessary to supplement a large number of elements, nitrogen, phosphorus and potassium fertilizer is mainly nitrogen and potassium to coordinate the vegetative growth and reproductive growth of tomato. Base fertilizer generally applies 4000 kg of mature heap manure, 40 kg of compound fertilizer and 30 kg of calcium superphosphate per 667m2. Topdressing, thin application before fruit setting, re-application after fruit setting, topdressing in different times. In terms of fertilization, we should pay attention to increase the application of phosphorus and potassium fertilizer, do not abuse the high hormone content of flushing fertilizer or foliar fertilizer.

Strengthen ventilation and light transmission. In the middle and later stages of growth, properly forking and picking leaves to enhance light and promote ventilation. Usually after the tomato is picked on the fruit branch, the side branches under it should be knocked off in time to ensure the nutrition supply, and all the leaves under the fruit branch should be removed at the same time. The leaves on the ear should not be removed to ensure the good development of the tomato in the upper layer. It should be noted that in the middle and later stage, leaf picking should be appropriate, both to enhance light, promote ventilation, removal of leaves should not be too much too early, otherwise the photosynthetic area is not enough, the accumulation of photosynthates is less, the nutrition supply is insufficient, the tomato is underdeveloped, and there are hollow fruits.

Strengthen light management, summer cultivation, the shading rate of the sunshade net should not be too high, generally should not be higher than 30%. When it's cloudy, it should be uncovered in time. When carrying out summer cultivation in facilities, the mulch can not be opened at any time, in this case, it is better to use gray shading net or screen; it can also be covered with waste plastic film on the top to protect against light and rain, and the side can be covered with screen ventilation to prevent insects. If the light saturation point is not reached for a long time and less photosynthate is produced, it will not be able to meet the nutritional needs of stems, leaves and tomatoes.