The main pests and diseases of jujube include: powdery mildew, scale insects, pine caterpillars, fruit rope, etc.
1. Taiwan Daqing Jujube, also known as Taiwan Sweet Jujube, scientifically called Ziziphus jujuba, is an evergreen small tree. It is a small evergreen tree that was developed from Indian Ziziphus jujube through multi-generation improvement and selection by Taiwanese breeders. Excellent fruit varieties. Taiwanese jujube has large fruit, thick flesh and fine core, beautiful appearance and rich nutrition. According to measurements, every 100 grams of fresh fruit pulp contains 18-23 grams of carbohydrates, 0.86 grams of crude protein, 50-85 mg of vitamin C, and is also quite rich in vitamins A1, B1, B2, K, etc. The fructose and glucose content reaches 11-16, and the soluble solids content reaches 14-20. In addition, it also contains trace elements such as phosphorus, calcium, iron, potassium, and zinc. Taiwanese green dates are neither cold nor hot, and have cooling, detoxifying, sedative and other effects. They are especially suitable for children and the elderly.
2. Powdery mildew can occur from seedlings to heading. It mainly damages wheat leaves, but also damages stems and ears. Small yellow spots begin to appear on the leaves, and then expand and develop into round or oval lesions, with a white powdery mold layer on the surface. Generally, there are more leaves in the lower part than in the upper part, and there are more leaves on the back side than on the front side. Mildew spots are scattered individually in the early stage, and then combine to form a large mold spot, which can even cover the whole leaf, seriously affecting photosynthesis, disturbing normal metabolism, causing premature aging and yield loss
3. Scale insects are the same Insects of the order Pteridae and the family Platycodidae, the female is wingless, with vestigial legs and antennae; the male has a pair of soft wings, well-developed legs and antennae, and piercing-sucking mouthparts. Most insects are equipped with wax paper secretions, that is, shells. There are more than 6,000 known species of scale insects in the world. There are more than 650 species of scale insects in 14 families recorded in my country, of which more than 160 species are considered agricultural pests. They are common on flowers and fruit trees and often cluster on branches, leaves and fruits. , sucking plant juices to survive. In severe cases, branches will wither or the entire plant will die. There are 6 common species including the cottony scale, camphor clam scale, bran scale, Korean ball scale, mulberry scale, and Kang's mealy scale
4. Pine caterpillars are Lepidoptera? The collective name for insects belonging to the genus Pine Caterpillars of the family Phytophthidae. Also known as caterpillars and fire caterpillars, they were also called pine caterpillars in ancient times. There are more than 30 species in the world, and 27 species are distributed in my country, which is the country with the richest species of pine caterpillars [1]. It eats important tree species such as pine, cypress, and fir. The earliest records in China can be found in the "Longchuan County Chronicle" of Guangdong in 1530: "In the ninth year of Jiajing in the Ming Dynasty, severe droughts occurred year after year. The hair was black, and the pine leaves that were eaten were all gone and stood withered. The cocoons were on the pine branches, and they were all gone in late winter." So far, Pine caterpillars are still the main forest pests that occur in large quantities and cause widespread damage.
5. The common name of fruit fly in English is fruit?fly or vinegar fly. It widely exists in temperate and tropical climate zones around the world, and Since its staple food is rotten fruits, it can be found in human habitats such as orchards and vegetable markets. In addition to the Arctic and Antarctic, at least more than 1,000 fruit fly species have been discovered. Most species feed on rotten fruits or plants, while a few only feed on fungi, sap or pollen.
Reference materials
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