Brief introduction of American red rocket Lagerstroemia indica

American red rocket Lagerstroemia indica seedlings, red fireball Lagerstroemia indica seedlings and red leaf Lagerstroemia indica seedlings are all first-generation and second-generation seedlings, all of which were cultivated by lateral propagation and cutting from the earliest female parent in China. Sowing seedlings are not used. According to research, if seed seedlings are used, the color will change seriously. Instead of continuous cutting of multi-generation seedlings, if continuous cutting of branchlets is adopted, the color of the first generation seedlings is not as bright as that of the second generation seedlings. In particular, the ability to resist pests and diseases is greatly reduced, and it is easy to be infected with powdery mildew, soot disease, leaf spot, witches' broom and aphids, and the ability to resist low temperature is also reduced.

The offspring of seedlings propagated by seeds of new varieties such as Lagerstroemia indica have serious character differentiation. According to the experimental research, more than 95% of the seedlings propagated by Lagerstroemia indica, Lagerstroemia indica and Lagerstroemia indica, that is, sowing seedlings or seedling seedlings, have changed their colors when they bloom, and they are all white flowers, pink, purple, etc. It is difficult to find the bright red of their parent trees. Therefore, new varieties such as Lagerstroemia indica must not use seeds to propagate seedlings.

Second, by constantly cutting young seedlings to form multi-generation seedlings to raise seedlings, the varieties degenerate quickly! According to the experimental study, in a year, cuttings were cut from the seedlings that survived in May, and then cuttings were cut from these surviving seedlings, thus forming 5-7 generations of seedlings a year. When these seedlings are planted in the second year, the height and thickness of the seedlings are 22-36% smaller than those of the first and second generations, and the colors are not as bright as those of the first and second generations. In particular, the ability to resist pests and diseases is greatly reduced, and it is easy to be infected with powdery mildew, soot disease, leaf spot disease, witches' broom disease and aphids, and the ability to resist low temperature is also reduced. This is American red rocket Lagerstroemia indica, which has the longest flowering period, good cold resistance and the reddest and brightest color.