Question 2: What shape are the leaves of pear trees? Pears, flowers, leaves, fruits and pictures.
Question 3: What are the leaves of a pear tree? Pears, flowers, leaves, fruits and pictures.
Question 4: What is the shape of the leaves of pear trees?
Leaf blade triangular, 9-15cm long, 9-17cm wide, 3-5 palmately divided, with irregular sharp teeth and wavy teeth at the edge, truncated or nearly heart-shaped at the base, stellate hairs when tender, and nearly hairless at the back.
Morphological characteristics of 1
Indus (Linn.F Marsigli) is a deciduous tree, reaching16m; ; The bark is turquoise and smooth. The leaves are heart-shaped, palmately 3-5-lobed, with a diameter of15-30cm. Deciduous trees, up to16m; The bark is turquoise and smooth. The leaves are heart-shaped, palmately 3-5-lobed, with a diameter of 15-30 cm, triangular lobes, tapering at the top, heart-shaped at the base, glabrous or slightly pubescent on both sides, 7 basal veins, and the petiole is as long as the leaves. The panicle is terminal, about 20-50 cm long, the lower branch is 12 cm long, and the flowers are yellow-green; Calyx 5 deeply divided to base, sepals strip-shaped, curled outward, 7-9 mm long, externally pubescent with yellowish color, only the base is pilose; Pedicels are as long as flowers; The pistil of the male flower is as long as the calyx, and the lower part is thick and hairless. The anthers of 15 gather irregularly at the top of pistil, and the degenerated ovary is pear-shaped and very small. The ovary of the female flower is spherical and hairy. U fruit is membranous and stipitate, and splits into leaves before ripening, with a length of 6-1 1 cm and a width of 1.5-2.5 cm. The outer surface is short or almost hairless, and each U fruit has 2-4 seeds. The seeds are spherical with wrinkles on the surface and about 7 mm in diameter. The flowering period is from June to July, and the fruit ripens in10-165438+1October. [2]
2 growth habits
Buttonwood likes light. Like warm climate, not cold-resistant. Suitable for fertile, moist sandy loam, such as alkali. Roots are fleshy, water-resistant, deep and thick; The germination ability is weak, so it is generally not suitable for pruning. It grows fast and has a long life span, and can live 100 years. In the growing season, the roots rot and die after being flooded for 3 ~ 5 days. Leaves grow late and fall early in autumn. It has strong resistance to a variety of toxic gases. Afraid of viral diseases, moths and strong winds. It should be planted on the edge of villages, houses, hillsides and limestone hillsides.
Related species
Phoenix indus in Hainan
Indus yunnanensis -Maz.
Question 5: What shape are the leaves of pear trees? Pears, flowers, leaves, fruits and pictures.
Question 6: What kind of tree is this? Leaves are like pear trees and grow slowly. It was Li Du, wasn't it?
Question 7: What are the characteristics of pear trees? 1, generally not high.
2. Oval shape of leaves
3. Pears
Question 8: What's wrong with pear trees like leaves? How to treat it? Pear diseases and insect pests
1. Eliminating hosts: It is the most thorough and effective measure to eliminate hosts such as Sabina vulgaris and Sabina vulgaris within 5 kilometers around the pear garden. When building a new pear orchard, we should consider whether there are host plants such as juniper and cypress nearby, and if there are, we should remove them all. If the quantity is large and cannot be cleared, don't be a pear garden.
2. Eradicate the overwintering germs: If the pear orchard is near the scenic spot or green space, it is necessary to spray bactericidal pesticides on the juniper tree to eradicate the overwintering germs and reduce the source of infection. That is to say, in early March (before the pear tree germinates), the diseased gall is cut from the host plants such as juniper, and then the lime-sulfur mixture of 4-5 Baume degrees is sprayed.
3. Spraying control of pear trees: spraying of pear trees should be carried out from the germination stage to 25 days after the opening of leaves, that is, the peak period of basidiospore transmission and infection. Generally, if it rains after the leaves of pear trees are unfolded and winter spore horns are found on juniper trees, the occurrence of rust can be basically controlled by spraying 20% fenxiuning EC 1 500-2000 times every 10- 15 days. If it can't be controlled, 800 times of 20% flusilazole prochloraz must be added. If it is not prevented in time, 20% fenxiuning EC and 800% fluosilazole prochloraz can be sprayed on the leaves after the disease, which can control the harm and play a good therapeutic effect. From the beginning of pear leaf development to the end of May, 1: 2: 200-240 times of Bordeaux solution can be sprayed; Or 70% Sheng Da M-45 800 times solution for protection. If the disease has occurred, 600-fold solution of 20% triadimefon, 3000-fold solution of 12.5% diniconazole and10/200-1500-fold solution can be sprayed for prevention and treatment to avoid phytotoxicity.