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Detailed Explanation of Lettuce Cultivation Techniques in Greenhouses
Growers who have greenhouses can cultivate lettuce and other leafy vegetables in the open space outside the greenhouse, making full use of land resources and improving economic returns. Lettuce is also known as leaf lettuce, butterhead lettuce, qianjin cai, etc., and is named for being edible raw. It is an annual herbaceous plant of the genus Lactuca in the Asteraceae family that can form a head or tender leaves for consumption. Lettuce leaves...
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Key Points of Seedling-Raising Techniques for Winter Greenhouse Cultivation of Lettuce
① Variety selection: Choose varieties with strong cold tolerance, disease resistance and strong adaptability, such as 'Emperor', 'Salinas', 'Great Lakes 659', etc. The seedbed should be fertile sandy loam with strong water- and fertilizer-retention capacity. ② Seedbed preparation: Because lettuce seeds are small, seedbed tillage must be strict, the soil must be finely prepared, and the bed soil should be as fine and crumbly and level as possible. Every 10...
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How to prevent and control lettuce soft rot? These methods you need to master
The disease mostly infects from the petioles at the root crown or the base of the roots, initially appearing as water-soaked yellow-brown soft rot with a foul odor. Sometimes soft rot starts from the edges of the outer leaves or the top of the head, and in severe cases the root pith and head rot. The pathogen spreads through watering or insects, invading through wounds and cracks in the plant. The optimum temperature for disease occurrence is 2...
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Symptoms, Characteristics and Control Methods of Lettuce Soft Rot
Pathogens Pseudomonas cichorii, P. marginalis, P. viridiflava Symptoms Also known as lettuce Pseudomonas rot or bacterial leaf spot, it is a bacterial disease. Plants in the early head-forming stage are susceptible. First, the leaf margins become water-soaked and gradually change from light brown to dark green, and part of the mesophyll tissue dies...
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How to Grow Lettuce for High Yields? A Detailed Guide to Cultivation Techniques
Lettuce seeds are grayish-white or dark brown achenes, with a thousand-seed weight of about 0.8 to 1.2 grams. Before sowing, treat the seeds with 70% Dexon at 0.3% of the seed weight. Lettuce seeds have low temperature requirements for germination; seeds can germinate at around 4°C, so sowing can begin in late March. Before sowing, water the seedbed thoroughly, ...
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Control Techniques for Lettuce Brown Spot and Black Spot
Lettuce brown spot and black spot mainly damage the leaves. Brown spot leaf spots show two types of symptoms: one initially appears water-soaked, then gradually expands into circular or irregular brown to dark gray lesions, 2-10 mm in diameter. The other is dark brown lesions with irregular edges and a water-soaked halo around the perimeter. On damp...
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Symptom Identification and Control Techniques for Lettuce Gray Mold
A reader from Jiangsu asks: what are the symptoms and control methods of lettuce gray mold? Answer: Lettuce gray mold mainly damages leaves and stems, and infection can occur from the seedling stage to the mature plant stage. Infection at the seedling stage. Leaves and young stems show water-soaked rot, with gray mold growing on the diseased parts. Leaf infection. It starts from the mature leaves near the ground...
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Detailed Explanation of Key Techniques for Open-Field Lettuce Cultivation
1. Disease symptoms: Both seedlings and mature plants can be affected, with mature plants suffering more severely, mainly damaging the leaves. Diseased leaves spread from the lower part of the plant upward. Initially, pale yellow nearly round to polygonal lesions appear on the leaves. When humid, white mold, which is the pathogen's sporangiophores and sporangia, grows on the lesions on the underside of the leaves, sometimes spreading to the upper surface of the leaves. In the later stages...
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Key Technical Points for High-Efficiency Cultivation of Eggplant, Lettuce and Broccoli
Broccoli, also known as green cauliflower, is a health vegetable with a complete range of nutrients and relatively high economic value. Its products have a long supply period; besides being eaten fresh, it can also be quick-frozen and dehydrated, giving relatively high production returns. 1. Variety selection ① Lvling: growth period 100-120 days, strong growth vigor, tall plant, moderate lateral branch growth...
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Tips for getting peonies safely through summer, don't let them die in summer
17. Don't let your peonies die in summer, tips for getting peonies safely through summer! This is the 17th article in the original "Peony Cultivation" column by Lanyao. Earlier we said that peonies like sunlight but cannot tolerate strong sun, and can withstand cold but fear heat, so peonies...
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