The melons grown normally grow straight and slightly apex. However, in the process of growth and development of cucumber, environmental conditions such as malnutrition, lack of light, and poor management are encountered, especially during the back-season cultivation of greenhouses, often due to certain conditions can not meet the growth requirements of cucumber and Guagua abnormalities, sometimes Bitter melon appeared. Cucumber malformation is a physiological disease, and the common ones are fine-shouldered melons, curved melons, and large-bowel melons, which affect the commodity value and yield of cucumbers and should be prevented as soon as possible.
The thin-waisted gourd-shaped gourd refers to the shrinkage and thinning at one or more places in the central part of the longitudinal axis of the melon. Thinning is often easy to break, the middle is empty, often turned brown. In the protected environment, if the plants are not fully fertilized and grow into thin-shouldered melons or the nutrition supply is not balanced or the conditions of high temperature and humidity are high, the cucumber plants tend to overgrow, and when the plants are in a continuous high-temperature and dry environment, the plants grow. Decreasing, so that the growth of normal growth of melons is limited, will occur thin waist melon; In addition, cucumber infection with scab or lack of boron, will also produce thin waist melons.
Preventive measures: To create good pollination conditions, strengthen nutrition supply, especially the fruit and fruit supply of fertilizer and water, supplement boron fertilizer, timely control of pests and diseases, but also in the early blooming stage using 0.05% ~ 0.1% of 2,4-D hormone spray to promote Fruit long straight.
Curcuma Cucumber is a high-water-fat vegetable. During the prosperous period of cucumber squash, sufficient temperature, light, and plenty of water and fertilizer are needed to meet the nutrient requirements of the cucumber during the fruiting period. If the temperature difference between day and night is too large, strong wind and weak light, coupled with the water and fertilizer management in cucumber, can seriously affect the development of cucumber ovary, it is easy to form curved melon; phosphorus, potash fertilizer is applied more and the melon period encountered drought conditions It is also prone to crooked melon strips, and the melon strips are not healthy and shiny.
Preventive measures: When cucumbers are growing, they should create good conditions for flower bud differentiation; in the expansion of cucumber fruit, fertilizer and water management should be strengthened; every time cucumbers are picked, nitrogen, phosphorus, and potassium fertilizers must be applied with the water to ensure the cucumbers. In the later period, the plant growth is not weak; the dense planting, cleaning the shed film, increasing the ventilation and light transmission performance in the shed, increasing the application of organic fertilizer, keeping the looseness of the root soil, and the lack of water in the soil.
The cucumber of cucumber is not fully fertilized, but only the middle to the tip of fertilization, the fertilized part of the accelerated hypertrophy, blocked the growth of unfertilized parts; coupled with fruit supply before the fruit expansion is insufficient or in the case of drought, it is easy to form a large bellied gourd; parthenocarpy Cucumbers, in the early stages of melon enlargement, such as poor nutrition, but also prone to sharp-bellied melon; cucumber fruity period relaxed fertilizer management, so that the growth of plants weakened or the recent cucumber desiccation, the strength of the old part of the lower part of the fight; Potassium deficiency in soil.
Preventive measures: to improve the ventilation and light conditions of the lower leaves of cucumber, increase the assimilation of leaves, and the strength of the old leaf when the lower part is not too large; to prevent the incomplete fertilization of the varieties with poor parthenocarpy, it should be strengthened at the end of the result to the later stage. For fertilizer and water management, every time cucumbers are picked, nitrogen, phosphorus, and potassium fertilizers must be applied with the water once to prevent the soil from drying out; foliar spray of 0.3% to 0.5% of potassium dihydrogen phosphate is applied.
Bitter melon due to the excessive application of nitrogen fertilizer or phosphorus, potassium fertilizer deficiency, especially the sudden excessive application of nitrogen fertilizer causes the plants to grow long, sit neatly, and the melons on the side branches and weak branches tend to appear bitter, in addition, in case of low temperature and sunshine Especially on cloudy days, the roots or activities of cucumbers are impaired, and the absorption of water and nutrients is low. The melon strips grow slowly and tend to accumulate more bittersin the roots and lower melons, resulting in bitter taste. Bitterness is hereditary, and the dark green leaves have a bitter taste. Bitterness occurs mostly near the cucurbits, and the apex is rarely seen.
Preventive measures: use non-bitter varieties such as Jinza and Jinchun series; strengthen the management of temperature; the initial temperature of seedling stage and fruiting nectar should be controlled at 13°C or higher; the later stage of guava should be controlled below 32°C; Loss, water control root melon should be appropriate, not excessive water control; balanced fertilization, a reasonable supply of various mineral elements, fertilization, nitrogen, phosphorus, potassium ratio of 5:2:6, to avoid excessive or too little nitrogen fertilizer; fertility The later spraying fertilizer was used to ensure the plants grow robustly. In addition, spraying biological agents Jian Bo can effectively prevent the occurrence of bitter melon.
An immunoassay is a biochemical test that measures the presence or concentration of a macromolecule or a small molecule in a solution through the use of an antibody (usually) or an antigen (sometimes). The molecule detected by the immunoassay is often referred to as an "analyte" and is in many cases a protein, although it may be other kinds of molecules, of different size and types, as long as the proper antibodies that have the adequate properties for the assay are developed. Analytes in biological liquids such as serum or urine are frequently measured using immunoassays for medical and research purposes.[1]
Immunoassays come in many different formats and variations. Immunoassays may be run in multiple steps with reagents being added and washed away or separated at different points in the assay. Multi-step assays are often called separation immunoassays or heterogeneous immunoassays. Some immunoassays can be carried out simply by mixing the reagents and sample and making a physical measurement. Such assays are called homogeneous immunoassays, or less frequently non-separation immunoassays.
The use of a calibrator is often employed in immunoassays. Calibrators are solutions that are known to contain the analyte in question, and the concentration of that analyte is generally known. Comparison of an assay's response to a real sample against the assay's response produced by the calibrators makes it possible to interpret the signal strength in terms of the presence or concentration of analyte in the sample.
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