-
How to prevent premature senescence in peanuts? Master the control methods
How to prevent premature senescence in peanuts? Please advise: to prevent premature senescence in peanuts, the following points should be followed: 1. Site selection. Choose fields with relatively high fertility, and apply sufficient base fertilizer, plow deeply 25-30 cm early, and sun the ridges. Apply 2000 kg of rotted barnyard manure or 25-35 kg of cake fertilizer, 50 kg of ternary compound fertilizer, 50 kg of phosphate fertilizer, zinc fertilizer... per mu.
-
What are the control methods for Osmanthus brown spot disease?
Brief introduction Osmanthus brown spot disease is a very common disease; in severe cases it causes the whole plant to drop its leaves, affecting flowering and ornamental value. It has long been reported in countries such as the UK, the US and Japan. It also occurs frequently in Shanghai, Nanjing, Hangzhou, Jinan, Beijing, Fuzhou, Guilin, Xiamen, Guangzhou, Taiwan, China and other provinces and cities in China. Symptoms The pathogen mainly infects the leaves...
-
How to prevent and control Osmanthus brown spot disease? These methods you need to know
Osmanthus brown spot disease is a common disease of osmanthus, caused by infection with fungi of the subphylum Deuteromycotina. It occurs in both field-planted and potted osmanthus plants. When it strikes, mild cases affect the ornamental effect, while severe cases cause plant death. Symptoms mostly occur on leaves, mostly spreading from the leaf tip and leaf margin toward the entire leaf. In the early stage, the lesions are light...
-
What are the control methods for scale insects on osmanthus?
Adults and nymphs often settle on osmanthus branches, suck sap, causing branches and leaves to wither, and in severe cases the whole plant dies. They often secrete large amounts of honeydew, which leads to sooty mold. Leaves and stems become covered with a black, sticky substance, hindering photosynthesis and affecting ornamental value. The main species are the cottony cushion scale and the white peach scale. Control methods: strictly prohibit the use of seedlings carrying the pest...
-
How to Control Whiteflies on Osmanthus Trees? Detailed Practical Methods
Adults and larvae insert their stylets from the underside of leaves to suck the sap of flower plant leaves. This causes leaves to turn yellow and drop. Adults can secrete "honeydew," which nourishes sooty mold pathogens, leading to sooty mold disease, contaminating leaves and branches, disrupting photosynthesis and respiration, causing poor growth of flower plants, yellowing leaves, weakened tree vigor, or death of the whole plant...
-
Causes of Gastrodia elata Trait Degradation and Control Methods
Degradation of Gastrodia elata traits often manifests as decreased yield of arrow gastrodia, with individuals becoming smaller and slender; a substantial reduction in the yield of rice gastrodia and white gastrodia, which turn ginger-yellow or light brown, with poor stress resistance, and the original yield and traits cannot be fully expressed. The causes are generally as follows: 1. Multiple generations of asexual reproduction. Generally after 5 to 6 generations of asexual reproduction...
-
Control methods for leafminer flies in yardlong bean cultivation
How to control leafminer flies when growing yardlong bean? Here are the methods. Liriomyza sativae belongs to the genus Liriomyza, family Agromyzidae, order Diptera. The pest mainly damages plants as larvae, which bore between the upper and lower epidermis of the leaves and feed on the leaf sap and mesophyll, forming nearly round, punctate, sunken yellow spots on the leaves. After the larvae mine and feed on the mesophyll, they form tunnels. The tunnels are curved...
-
What are the control methods for rice viral diseases?
How do you control rice viral diseases? Please explain the methods. Rice viral diseases occur in explosive, intermittent and migratory patterns. The severity of rice viral diseases is closely related to the cropping system, the population size and migration patterns of transmission vectors, climatic conditions and cultivation management measures. Control should implement the plant protection policy of "prevention first, integrated control"...
-
What are the control methods for rice lodging and weed damage?
How to control lodging and weed damage in rice? Please introduce the control methods. Rice is prone to lodging and susceptible to weed damage, and the following countermeasures should be taken: Choose suitable varieties. When selecting direct-seeded rice varieties, besides having good quality, high yield and multiple resistance, they should also have the characteristics of fertilizer tolerance, short stature and moderate tillering. For early rice, medium-maturing varieties should be chosen...
-
Detailed Explanation of the Causes of Rice Lodging and Control Methods
Why does rice lodge? How should it be prevented and controlled? Please give an introduction. The earlier rice lodging occurs, the greater the impact on yield; in severe plots, yield can be reduced by more than 50%, or even cause total crop failure. Lodging also has a great impact on rice quality, and at the same time increases harvest difficulty. Although rice lodging is related to windy and rainy weather, the main...
条件筛选