To cure a case of powdery mildew, you will need to use the same protocol that you did for Alternaria leaf spot, which is to use a spray-on fungicide. Using an all-natural fungicide is the best option because it will not affect the plants themselves, only the attacking fungus. This will also ensure that you are not coating your sweet and juicy cantaloupes with inedible or even poisonous compounds. Cantaloupe plants are particularly susceptible to this issue if they are grown in areas with minimal shade and excess water.
They also suggest that you water your cantaloupe patch in small quick intervals to avoid the collection of standing water around the plants. Another issue that can arise around harvest time is the spontaneous cracking open of the cantaloupe fruits. Sometimes you will find that a cantaloupe that looked healthy has suddenly burst open in the patch, leaving it exposed to the elements and turning it into a feast for all sorts of critters.
According to the people at Vegetable Gardening Online, the main reason that cantaloupes and other melons split open on the vine is due to sudden overwatering. This, unfortunately, is an issue that cannot be prevented.
All you can do is keep up with normal watering and compost the burst cantaloupes. If you notice that, despite frequent watering and appropriate weather conditions, your cantaloupes are growing slowly or not ripening, then you should be somewhat concerned. This indicates that there is an issue related to the growing conditions of the melon, likely somewhere in the soil or the roots. One of the biggest issues that causes poor growth in cantaloupe plants is insufficient sunlight.
To counter these two issues, you will need to make sure that you plant your cantaloupes in a full-sun area of your garden perhaps opting to gently replant them as well as make sure that they are well-spaced from one another.
Cantaloupes are a variety of melon that is enjoyed around the world. They are generally quite easy to grow, although there are a few issues that gardeners may encounter along the way. One of the biggest issues of growing cantaloupes is the tendency for leaf discoloration, which can generally be solved through using insecticides, fungicides, or changing the amount of water they get.
Both of these issues can be caused by a lack of sunlight and proper watering, as well as a lack of pollination. Downy mildew causes yellow spots on leaf surfaces, while the undersides appear gray and fuzzy.
To control downy mildew, remove old plant debris from the garden. Air pollution can cause yellowing of cantaloupe leaves, particularly ones that are older and at the crown of the plant. Despite the discoloration of the leaves, the cantaloupes will develop and grow.
Leaves can also turn yellow due to too much manganese in the soil. If soil pH drops below 5. Manganese is often found in fertilizers. If you suspect manganese toxicity, stop using fertilizer and test the soil's pH.
Water consciously and if needed, check the soil with your fingers and water only when the soil is dry up to 2 inches. Use a sprinkler irrigation system as it helps supply the plant with just enough water if you can time it correctly. Whiteflies are a group of over species of insects that feed on the undersides of the leaves. Whitefly populations increase in the spring season. You may want to spray something before the spring to prevent a large-scale infestation.
The direct damage of whiteflies is minimal but they do transfer viruses. This makes whiteflies a great threat to Sweet melon plantations. Whiteflies evolve quickly and thus have developed a resistance to many pesticides. Spider mites are tiny insect pests that are almost invisible to the naked eye. One can identify their presence by the webcasts they leave behind on and around the leaves. Water your Cantaloupe plant adequately as Spider mites prefer dry conditions. Once you notice them try to wash them off with a strong stream of water.
Cantaloupe plants are also susceptible to mosaic viruses. This virus causes yellowing and distortion of the leaves. Leaves turn mottled yellow. This virus is spread from one plant to another by aphids. So, if you could control aphids you probably could control this virus. Sanitize the tools you used on the infected plants.
Plant resistant varieties in future. Male flowers are seen first on the plant. They mature right when the female flowers are produced by the plant. If the yellowing is on leaf edges it most commonly is due to salt effects and fungicides. Copper fungicides are often the culprit in this leaf yellowing, causing a phytotoxic reaction.
Foliar fertilizer applications can often worsen the yellowing by increasing salt levels on the leaves. Each year there are some fields of cantaloupes that are affected by manganese toxicities.
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