-
How to control mango weevil disease? Detailed explanation of control methods
1. The mango leaf-cutting weevil is widely distributed. Adults feed on young mango leaves, causing the leaves to dry up; or females lay eggs on young leaves and bite the young leaves off from the base, affecting plant growth. Control methods: ① During the growth period of young shoots, pick up the bitten-off fallen leaves from affected plants once every 3 days, dry them in the sun and burn them to kill the lar...
-
Cause analysis and prevention and control methods for shiitake mushroom log rot
Causes and prevention and control methods of shiitake mushroom log rot
-
What causes deformed melon fruit? Causes and control methods
Causes of deformed fruit in melons and control methods
-
January eggplant pest and disease control and management technical points
For eggplants raised as seedlings in early spring, the main focus is controlling soil-borne diseases: damping-off, Rhizoctonia rot and sclerotinia rot. To disinfect the seedbed soil, mix 50 kg of seedbed soil with 20 g of 68% Jinlei water-dispersible granules and 10 ml of 2.5% Shileshi suspension concentrate, sieve and blend the soil, then fill nutrient pots with it, or spread it over the seedling bed. During the seedling stage, spray 0.1%-0.2% monopotassium phosphate, ...
-
Common Problems of Greenhouse Eggplant in Early Spring and Their Control Methods
In the early spring season, when temperatures are low and light is weak, greenhouse eggplant often shows various abnormal conditions. The common problems and their control are described below: 1. Stunted seedlings In the early spring crop, eggplant often shows stunted seedling symptoms at the seedling stage, such as small leaves, dark green color, thin stems and few roots. After transplanting, such seedlings recover slowly, grow weakly, and...
-
Occurrence Patterns and Control Methods of Barley Yellow Mosaic Disease
Barley yellow mosaic disease occurs mainly in the lower Yangtze River basin, in the provinces and municipalities of Hubei, Zhejiang, Jiangsu, Shanghai and Anhui, among which Jiangsu, Zhejiang and Shanghai are the most severely affected. Diseased plants die off prematurely, leading to a lower rate of productive tillers in barley, a marked reduction in seed-setting rate, lower thousand-grain weight, lower flour yield and reduced quality. When barley develops...
-
Transmission Routes and Control Methods of Barley Covered Smut
How is barley covered smut transmitted? What control methods are there? (1) Occurrence pattern: The transmission routes of the barley covered smut pathogen occur in two situations: one situation is that during threshing, black powder (chlamydospores) gets mixed in, and the chlamydospores adhere to the seed surface; after barley is sown, the chlamydospores germinate into hyphae and invade the young tissues of the barley seedlings...
-
Which fungicides give good control of tomato leaf spot?
★Symptoms: Tomato leaf spot, also known as white star disease. It can occur at all growth stages of tomato and attacks leaves, petioles, stems, calyxes and fruits. When leaves are infected, water-soaked small round spots first appear on the underside of the leaf, then numerous small spots with dark brown edges and grayish-white, round or nearly round, slightly sunken centers appear on both the upper and lower surfaces of the leaf. The lesions...
-
What to do when tomatoes get bacterial spot? Symptoms and chemical control methods
★Symptoms: Tomato leaves, stems and fruits can all be infected by bacterial spot. The old leaves near the ground are affected first, with initial water-soaked dark green spots that enlarge into nearly round or irregular brown lesions with distinct edges, surrounded by a narrow yellow halo ring, thinner in the center and with a greasy sheen. Stems, when infected, first develop water-soaked dark green to yellowish-brown...
-
What causes yellowing and curled leaves in tomatoes? Detailed prevention and control methods
Question: What is the cause of yellowing and curled leaf disease in tomatoes? How can it be prevented and controlled? Answer: Hello! Regarding yellowing and curled leaf disease in tomatoes: if this disease is accompanied by the occurrence of tobacco whitefly (small white moths), then it is very likely tomato yellow leaf curl virus disease (commonly known as: TY virus disease). TY virus...
条件筛选