Let’ see the cause, syndromes, and prevention. There are a number of diseases that affect cucumbers. This page highlights non-chemical practices to prevent or manage common insect and disease problems of cucumber, pumpkin and squash. Remove plant debris from the garden after harvest, since many diseases survive on plant debris from year to year. If the leaves on your cucumber plants are pale and turning yellow, especially the lower leaves, the soil may be lacking in nitrogen. For more detailed information follow the links in each section. Plant Diseases. You can avoid these problems by choosing diseases-resistant cucumber varieties. One of the more common diseases is powdery mildew. Cucumber beetles can cause the most damage, particularly to seedlings, and carry wilt disease from plant to plant. When watering, it is best to avoid making the leaves too moist and to use targeted watering methods such as watering cones, soaker hoses or thin irrigation tubes. Bacterial wilt, Phytophthora Blight and Fusarium Wilt are three diseases mentioned in this article. Unfortunately, there are plenty of insect pests that might get to the cucumbers before you do or transmit diseases, rendering plants unable to produce. Fruits may be pointed at the blossom end. Luckily, many varieties are disease tolerant or resistant. The major insect pests that attack cucumbers include cucumber beetles, aphids, and spider mites. Depending on the cucumber variety you plant, you may rarely have problems with other cucumber diseases. Healthy cucumber plants will provide the gardener with a bountiful harvest of the delicious, crisp fruit, sometimes too bountiful. More information about growing cucurbit plants is available in the fact sheets: HGIC 1304, Cantaloupe & Honeydew Melon ; HGIC 1309, Cucumber ; HGIC 1321, Summer Squash ; and HGIC 1325, Watermelon . This disease also afflicts most other cucurbits as well as many non-cucurbit species. Use floating row covers to protect young fruit on parthenocarpic varieties, and spray pyrethrum on other cucumber varieties. Specific ways to prevent a fungal cucumber disease is to be aware of the amount and location of water. These insects and diseases are common on many plants in the squash family, including winter squash, zucchini, watermelon, muskmelon and gourds. Most of them are fungal infections. The symptoms of cucumbers with anthracnose disease are often confused with other foliar diseases, which makes anthracnose control in cucumbers difficult. Avoiding handling the plant too much also can help, because many fungal diseases enter plants through a breach in the plants… This is identified by white, mildew-like patches on the leaves. To quickly solve this problem, spray your plants with dilute fish emulsion or … Bacterial Wilt. Problem: Cucumber Mosaic Affected Area: Leaf, Flower, Stem, and Growth Description: In cucumber, melon, and squash, cucumber mosaic virus causes severe plant stunting, prominent foliar yellow mosaic, malformation, prominent downward leaf curling, and drastic reduction of leaf size and stem internodes. Tolerance means the plant … Diseases. Anthracnose in cucumber crops can cause serious economic losses to commercial growers. Cucumber Insects & Diseases. The leaves of cucumber plants can die of diseases. Also check for stunted growth and undersized leaves. An insect named cucumber beetle brings this disease to cucumber plants. The leaves of the plant are arranged alternately on the vines, have 3–7 pointed lobes and are hairy. The first flowers to open on a cucumber vine are always males, and there are always more male flowers on any given plant than females. 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