Extension > Garden > Diagnose a problem > What's wrong with my plant? > Vegetable > Summer Squash and Zucchini > Poor or no emergence
Summer Squash and Zucchini > Seedling > Poor or no emergence
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Damping off
Pythium spp., Rhizoctonia sp., and Fusarium spp.
- Seed may rot in soil
- Leaves and stem appear discolored, water soaked
- Seedling may tip over at soil line
- Cobweb-like or cotton-like fungal growth on seedlings or potting mix
- More information on Damping off
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Cold Temperature
- Weather has been cold (below 50°F) and wet
- Soil is cold (below 62°F) and damp to the touch
- Leaf edges turn olive green to brown
- In severe cases entire leaves, young shoots or the entire plant may be completely discolored and wilted
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Seed Corn Maggot
Delia platura
- Maggots feed on developing seed and can completely destroy the seed, or damage the cotyledons and first true leaves
- Maggots are yellowish-white, about ¼ inch in length, and legless
- More common in cooler weather
- Seed corn maggot should not attack plantings made after June 1st
- More information on Seed Corn Maggot
