The method of sowing and raising seedlings of sycamore in spring
Indus is a deciduous tree of the genus Indus of the family Indus with straight ends and green bark. It is an excellent street tree species and has been widely used in urban and rural greening in recent years. Through several years of practice, the author has explored a set of techniques for raising seedlings by spring sowing of sycamore, which is introduced as follows: the sowing time can be carried out in Beijing Plain from late March to early April after soil thawing in spring. The soil is prepared to turn the soil 30 cm deep before sowing, remove weeds, roots and other sundries, and then do ridges or bed and soil disinfection to do ridges and bed sycamore seedlings should be raised in high beds, wide ridges or containers. This is especially true on loam and clay which are easy to cause soil consolidation. Low bed or flat bed can be used to raise seedlings on sandy loam.
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technique of sowing and seedling raise of Chinese parasol tree in spring (II)
Seedling management 1. Loosening and weeding After sowing, dicotyledonous weeds such as Lepidium chinensis, Rhynchus chinensis and Amaranthus chinensis will breed in large numbers, which can be manually removed or sprayed with 1/1000 of 2.4-D. Weeding to "except small, except early, except" for the principle of loose soil thickness 2 to 3 cm. 2. Fertilization Irrigation Fertilize when the seedlings are 3 to 5 cm high, apply 8 to 10 kg compound fertilizer per mu, combine irrigation application, and then water according to soil moisture. 3. Disease and pest control During the seedling stage of Chinese parasol, attention should be paid to the prevention of seedling blight by early sowing and high ridge seedling raising.
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What are the prevention and control methods of sycamore diseases and insect pests?
The prevention and control methods of sycamore diseases and insect pests are as follows: first, remove and burn the fallen leaves, and spray Bordeaux liquid or chlorothalonil during the disease period. Second, spraying soap and petroleum emulsion in early spring to kill sycamore planthopper. Third, kill longicorn beetle adults artificially, and inject fenitrothion and dichlorvos in the tunnel. Fourth, other pests nymph stage or larval stage, spray dimethoate, dichlorvos, trichlorfon and other agents.
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