I. Symptoms: The melons stop in the middle of the enlargement, and the top of the fruit is yellow and bulging, and the fruit quality is greatly reduced.
Second, the cause of the disease: The main reason is that the plant leaf nutrient assimilation function declines, the fruit can not get enough nutrients; spend more, high fruit setting rate, easy to produce sharp-nosed fruit or melon; fruit.
Third, prevention and control methods:
1. Strengthen melon management:
Deepen the plough layer, increase the application of organic fertilizer and trace element fertilizer and biological fertilizer in large dispensers; do not stay too close to the roots to keep melon, that is, leave two or three melons, do not leave a melon, so as to avoid causing stunting; pay attention to insulation, Promote the smooth expansion of the fruit; must ensure the supply of moisture to the young melon (when the size of the fist is the size of the first fruit).
2, artificial pollination:
This is a necessary measure to ensure that fertilization does not occur in fruits. When pollinating artificially, choose sunny days, pick open male flowers at 7-10am, peel off corolla to reveal anthers, and apply pollen on female stylar heads evenly. If there are few male flowers, one male flower can wipe 4-7 female flowers; if there are many male flowers and even rainy days, artificial pollination is more important. In the afternoon before flowering, the male and female flower buds should be put on paper hats or leaves, and the leaves should be protected from rain. If it is still raining the next day when pollination is conducted, it can be polluted by the above methods and pollination, then the female flowers can be put on. Paper hat. And the male flower pollen is not wetted by rain. As long as there is no rain or water for 3 hours, the female flower can complete the fertilization process. Immediately after the rain, remove the paper cap or leaves and leaves.
Insect net greenhouse also known as plant and vegetables greenhouse net. Used for prevent the insect fly into the greenhouse during the plant growing, and cover the plants. Key off the approaches that the pests (adult insect) breeding. Effective control of the spread of all kinds of harmful pests spread, such as Cabbage caterpillar, diamondback moth, aphids, flea beetles, Sweet agnates, American leaf miner, literal etc and prevent the harmful of virus spread. Significantly reduced the use of chemical pesticides, so that the planting vegetables good-quality and health.
Greenhouse Insect Net,Insect Mesh Netting,Insect Mesh
JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.greenhousehydroponic.com