Tomato leaves where the third true leaf is

<> many people think that tomatoes are tomatoes, but in fact, they are different, the ancient name is June persimmon, good news three yuan. In Peru and Mexico, it was originally called "wolf peach". The whole body is viscous glandular hairs with a strong odor.

The stems are prone to lodging. Leaves pinnately compound or pinnate deeply lobed, leaflets very irregular, unequal in size, ovate or rectangular, margins irregularly serrated or lobed. calyx radiate, lobes lanceolate, fruiting; The corolla is radiate, yellow.

berries oblate or nearly globular, fleshy and juicy, orange or bright red, smooth; Seeds yellow. Flowering and fruiting period: summer and autumn. Tomato is a temperature-loving and light-loving vegetable, and the requirements for soil conditions are not too strict, but in order to obtain a high yield and promote the good development of the root system, a fertile loam soil with deep soil layer, good drainage and rich in organic matter should be selected.

Native to South America, it is widely cultivated in the north and south of China. Tomatoes are nutritious and have a special flavor. It has the effects of eliminating fatigue, increasing appetite, improving the digestion of protein, and reducing stomach distension and food accumulation.

When the tomato seedlings grow from the seeds, you will first see two narrow green leaves, these two leaves are formed in the seeds, called cotyledons, and the third leaf that grows in the middle of the two ** leaves is called the true leaf. Knowing this, the third true leaf is easy to find.

The bottom two symmetrical tomato seedlings are called cotyledons, and the cotyledons that grow in the middle are called true leaves, counting from the bottom to the third page, that is, the third true leaf.

Hello dear tomatoes, the first leaf of small tomato germination will roll the leaves, which may encounter the following situations: 1. This kind of situation caused by the invasion of cold wind mostly occurs in the early stage of seedling raising and wind, generally starting from the tip of the leaf to roll, the leaves are chicken claw-shaped, and the dry tip is with white edges when severe. The main reason for this is the violent wind, the sudden attack of the plants by low differential temperature and dry air.

Prevention and control methods: pay attention to the external climatic conditions when releasing the wind, take a step-by-step approach, close the tuyere immediately when the leaves are rolled, increase the temperature, and spray warm water on the plants in time, and make it recover naturally. If you don't plant it in a greenhouse, you can plant it yourself as a potted plant, so you can move it back indoors and pay attention to the light.

2. Viral diseases caused by viral diseases mostly occur in the seedling stage and adult stage, after the onset of the disease, the leaves of the plants are curled, the wrinkles become smaller, and in severe cases, they become tubular shapes, and the plants are clustered or stop burning poorly. Control method: soak seeds with 10% trisodium phosphate solution for 30 minutes before sowing; early eradication of aphids and vectors; After colonization, spray virus A or phytoxin every 7-10 days for control.

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