Management techniques of early flowering stage of Tomato

???? I. Temperature management

The optimum temperature for tomato flowering period is 24-26℃ during the day and 12-14℃ at night. Tomato flowering stage is sensitive to temperature, especially from 5 days before flowering to 3 days after flowering.

? II. Pruning and branching at initial flowering stage

The first big flower on the first ear of tomato will affect the fruit setting of other flowers, so it should be knocked out in time. Before the first panicle and fruit sit, it is not advisable to shoot branches too early, which will reduce the growth of plants in the early stage and affect rooting. Generally, when the branches grow to about 10-12 cm, they will be knocked out. After the first ear of fruit sits, the branches on the upper part of the tomato should be knocked out in time. Take care to minimize cuts when crossing. Cooperate with pruning and branching, and do a good job of hanging vines.

???? III. Precautions for dipping flowers

1. No matter which kind of anther dipping agent is used, different concentrations should be used according to different temperatures, and it should be prepared in strict accordance with the instructions of the flower spraying agent;

2. Avoid repeated dipping;

3. It is best to dip flowers in the morning of the day of flowering;

4. The low temperature and high humidity in the shed in early spring are conducive to the occurrence of gray mold. The pathogen is easy to invade through wounds or weak residual flowers. The flowering period is the peak of infection. Therefore, flower dipping should be combined with the control of gray mold. 50% prohydantoin suspension or 40% Schleswig suspension can be added when preparing anther dipping solution, and 1ml of pesticide can be added to each catty of water.

IV. Prevention and control of diseases and insect pests in early flowering stage

The main pests in this period are whitefly and leaf miner. Control whitefly with imidacloprid plus buprofezin, control leaf miner can be used emamectin, ban qian jing and other chemicals spray.

Tomato into the early flowering stage, but also to the disease high incidence period. Disease control should follow the principle of "prevention first, prevention combined", do a good job in cultivation management, spray protective fungicides regularly before disease occurrence, and prevent in advance. Once the disease occurs, timely and targeted spraying is carried out at the early stage of the disease.