Pumpkins and squash belong to the Cucurbitaceae family. Generally pumpkins belong to the Cucurbita pepo, C. maxima, and C. moschata species. The C. pepo species are usually recognized as the true pumpkin. Pumpkin varieties within this group have orange-yellow flowers, and fruits with bright orange skin and hard, woody, distinctly furrowed stems.

Summer squash appears in many different fruit shapes and colors: Scallop or Patty Pan is round and flattened like a plate with scalloped edges, usually white but sometimes yellow or green.

Summer Squash (Cucurbita pepo and Cucurbita maxima) Symptoms Cucumber beetle adults are yellowish and about1/4-inch long.The striped ( Acalymma vittatum ) and spotted ( Diabrotica undecimpunctata howardi) cucumber beetles have black stripes or spots, as their names suggest.

Gummy stem blight, or black rot, caused by the fungus Didymella bryonia, is an important disease of cucurbita, particularly pumpkins and squashes. ,

Summer Squash (Cucurbita pepo and Cucurbita maxima) Symptoms. On cucumber, leaf symptoms appear as small ...

Downy mildew is caused by many different species of Bremia, Peronospora, and Pseudoperonospora.Primary infections generally come from spores produced on greenhouse-grown plants, bulbs, or sets, or spores produced on southern-grown crops and carried progressively northward on moist air currents during the spring and summer.

In Illinois, the fungus is presumed to overwinter in crop and weed refuse. More important sources of infection may be spores produced on greenhouse-grown vine crops and perennial hosts grown in the field in frost-free areas of the far South during the winter.

These herbicides all inhibit photosynthesis in susceptible plants. Triazines: atrazine (numerous premixes), metribuzin (Sencor), and simazine (Princep).

Summer Squash (Cucurbita pepo and Cucurbita maxima) Sweet corn (Zea mays L. var. rugosa ) Tomato (Lycopersicon esculentum) Vine. Morning Glory (Ipomoea tricolor) Morning Glory, Common (Ipomoea purpurea) Sweet Pea, Annual (Lathyrus odoratus) Sweet Pea, Perennial (Lathyrus latifolius) Sweet Potato, Ornamental (Ipomoea batatas)

These herbicides inhibit the production of certain photosynthetic pigments in the plant. Various: clomazone (Command), isoxaflutole (Balance PRO),mesotrione (Callisto and a component of Lumax and Lexar), and tropamezone (Impact).