-
What are the common late-season fruit diseases of walnut trees?
What diseases affect walnut tree fruit in the late season? The following diseases affect walnut tree fruit in the late season: 1. Walnut anthracnose. Disease symptoms: after the fruit is infected, brown to dark brown round or nearly round lesions appear on the rind, with a sunken center and small black dots, sometimes forming concentric rings. When air humidity is high, the lesions bear...
-
Identification Methods and Control Measures for Ginseng Diseases
Ginseng damping-off disease 1. Symptoms. Caused by infection with Rhizoctonia solani and Fusarium species. It prevents young seedlings from emerging, or after emergence attacks the stem of the seedling at the boundary between dry and moist soil 3-5 cm below the soil surface. The affected part is light yellowish-brown, gradually turning dark yellowish-brown, forming sunken elongated lesions that penetrate deep into the stem and cause rot; after enlargement the diseased...
-
What are the methods for preventing and controlling pests and diseases in yam?
What methods are there for preventing and controlling pests and diseases when growing yam? Please give an introduction to the methods. When growing yam, the following methods can be used to prevent and control pests and diseases: I. Agricultural control 1. Selecting disease-resistant varieties is an effective method for preventing and controlling yam pests and diseases. When cultivating disease-resistant varieties, a rational layout should be used, rotating varieties every 2 to 3 years, and paying attention...
-
What diseases should be prevented and controlled when growing sunflowers?
What diseases should be prevented and controlled when growing sunflowers? Please give an introduction. Sunflowers need prevention and control of the following diseases: I. Symptom identification 1. Sunflower rust is an important disease of sunflowers, reducing yields by 40-80% in pandemic years. After infection, rust-like spore piles can form on leaves, petioles, stems, flower discs and other parts. When leaves are infected...
-
How to prevent and control aloe pests and diseases? A full breakdown of practical methods
What should you do if you want calla lilies to bloom more? What techniques are needed to make calla lilies grow vigorously and bloom more? You must follow their habits and do the following: ① Plant them in fertile, loose, slightly acidic sandy soil, with a pH value of about 5.5-7. Calla lily growth mainly relies on base fertilizer; during the growth process, lack of fertilizer or excessive fertilization will both cause...
-
What diseases need to be prevented and controlled in the cultivation of yardlong beans?
What diseases need to be prevented and controlled in the yardlong beans being grown? Please give an introduction. The main diseases of cultivated yardlong beans are as follows: 1. Identification and control of cercospora leaf spot. 1. Symptoms: It mainly damages leaves, stems and vines, and pods. In the early stage of the disease, purple-brown spots appear on both sides of the leaves. After they expand, they become nearly round dark brown lesions, 1~2 cm in diameter...
-
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 common main pests and diseases of osmanthus?
Potted osmanthus often blooms very little or is slow to bloom. To make osmanthus bloom abundantly with fragrant flowers, you need to master the following main points: variety selection: different varieties of osmanthus do not all bloom at the same time. For example, Yueyuegui, Sijigui and others are early-flowering varieties, with the characteristic of blooming several times a year, some...
-
What pests and diseases should be prevented and controlled when growing chives in summer?
What pests and diseases should be prevented and controlled when growing chives in summer? Please explain. Chives should have the following two pests and diseases prevented and controlled in summer: prevent and control Fusarium wilt. In summer and autumn, high temperatures, or hot sun exposure after rain, make Fusarium wilt prone to occur. The symptoms are water-scalded lesions near the ground, and in severe cases the whole plant dies. In terms of management, pay attention to...
-
What are the common pests and diseases during the cultivation of osmanthus trees?
How to grow osmanthus trees? Please guide the cultivation of osmanthus as an evergreen small tree, with varieties such as Jingu (orange-yellow flowers), Yingui (yellow-white flowers), Dangui (orange-red flowers), and Sijigui (pale yellow-white flowers). Osmanthus is not only an important landscaping tree species, but also a famous aromatic plant with high edible value. I. Prop...
条件筛选