-
What are the control methods for pineapple mealybug
The scientific name of the pineapple mealybug is Dysmicoccus brevipes (Cockerell), belonging to the order Homoptera, family Pseudococcidae. Dysmicoccus neobrevipes is the most commonly seen. Damage symptoms: adults and nymphs damage the rhizomes, leaves, fruits and seedlings of pineapple by sucking their sap. Affected leaves first show symptoms starting from the lower part,
-
Control Methods and Key Technical Points for Lemon Gummosis
Lemon is rich in amino acids, vitamins, various trace elements and other nutrients essential to the human body, making it an excellent health fruit for human consumption. Lemon has a wide range of practical value, and demand is growing ever larger, with broad market prospects; at present, lemon is a fruit in short supply on the international market
-
Pest Control Methods in Chestnut Cultivation
1. Chestnut gall wasp The chestnut gall wasp, also called the chestnut gall wasp, has a dark brown head and abdomen in the adult stage, filiform brown antennae, and a swollen, jet-black thorax. It lays eggs in the buds from June to July, and the larvae grow and overwinter inside the buds. In spring, when the buds sprout and produce short shoots, the damaged branches or leaf stalks swell into
-
Control Methods for Chestnut Blight in Chestnut Cultivation
Chestnut blight, also known as chestnut dieback and canker, is a worldwide disease. Both seedlings and fruiting trees can be infected; in mild cases it reduces afforestation survival rates and yields, while in severe cases it causes afforestation failure or total crop loss of an entire chestnut grove. Xitaoyuan Forest Farm in Mingguang City
-
Control methods for round spot root rot in hawthorn
Round spot root rot is one of the important causes of hawthorn tree death. 1. Symptoms: the fibrous roots first turn brown and die, and reddish-brown round lesions form around the base of the fibrous roots. In severe cases, the lesions merge, and the rot penetrates deep to the xylem, causing the entire root to turn black and die. 2. Transmission
-
Control Methods for White Root Rot in Hawthorn Cultivation
Hawthorn white root rot is an important root disease of hawthorn trees in old hawthorn-producing areas and is the main cause of death of old and weak trees. I. Symptoms After infection, the roots are entangled with white to grayish-white silk-like nets, which are the pathogen's rhizomorphs, and a grayish-white thin downy substance is produced at the root crown area on the ground. Leaves become smaller and leaf margins scorch, and some or all of the small branches and large branches die back.
-
Control Methods for Four Pests in Hawthorn Cultivation
1. Peach fruit moth 1. Ground control: before the larvae emerge from the soil, spray the soil surface within the hawthorn tree drip line with chlorpyrifos diluted 1000 times, and spray once more at an interval of 15-20 days, which can effectively control the peach fruit moth. 2. Tree control: during its peak egg-laying period
-
Control Methods for Penicillium Mold and Green Mold in Pomelo
Symptom characteristics: mainly affects fruit after harvest during storage and transport. The symptoms of the two diseases are similar, mostly starting from the stem end or wounds, initially appearing as light brown water-soaked spots. The lesions expand rapidly, the fruit softens and rots, and a layer of white mold grows on the lesion surface; later the white mold patches turn into green mold patches.
-
Pomelo Anthracnose Control Methods, a Must-Read for Growers
Symptom Characteristics Harm to leaves, twigs and fruit. On leaves and twigs during continuous rainy and humid weather, acute-type symptoms appear: pale bluish patches with dark brown on leaf tips, like scalded by boiling water, with indistinct edges; tender shoots show acute wilting like scalded by boiling water. In briefly humid weather that quickly turns clear,
-
What are the control methods for citrus canker?
Symptom characteristics Damage to leaves, twigs and fruit. The common feature of the symptoms is that all affected parts show corky, raised lesions, with the center of the lesion cracking in a crater-like pattern; the difference is that the corky lesions on leaves penetrate both the front and back of the leaf, with a yellow halo around the lesion, while the lesions on fruit and twigs
条件筛选