Category: Fact Sheets

Scarab beetles

Pest: Scarab beetles (Asiatic Garden, Japanese, Oriental, Chafers) Pest/disease identification and lifecycle, most common damage symptoms and crops affected: There are several species of scarab beetles that are common in New England turf, fruit and vegetable crops. These were all introduced to the United States. Japanese beetles are the most common and widely distributed. Below

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Basil Downy Mildew

Pest: Basil Downy Mildew (Peronospora belbahrii) Pest/disease identification and lifecycle, most common damage symptoms and crops affected: Downy mildew of basil was first reported in Uganda back in 1930. Relatively recently it spread to Italy in 2004, France in 2005, United States (Florida) in 2007 and by 2009 had made its way to New England.

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Tortoise Beetle

Pest: Tortoise beetle (species in the Cassidinae subfamily) Pest/disease identification and lifecycle, most common damage symptoms and crops affected: These beetles are typically only a very minor pest. They do not typically cause serious damage and do not warrant spraying. The numbers are usually small and the beetles can be picked off by hand, and

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Blossom End Rot

Blossom End Rot Blossom end rot is a familiar sight for many tomato growers, but it can affect other crops as well, such as peppers and squash. Though it may look like a disease, and it sometimes allows infection by secondary decay organisms, blossom end rot is an abiotic growth disorder caused by stressful growing

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Early Blight

Disease: Early blight on tomato (Alternaria) Pest/disease identification and lifecycle, most common damage symptoms and crops affected: Early blight is a serious problem in tomatoes and potatoes, but rarely affects peppers and eggplants. In most years, it is very common; much more common than late blight, which is usually rare in Maine. All aboveground portions

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Garlic Anthracnose

Pest: Anthracnose (Colletotrichum fioriniae) Pest/disease identification and lifecycle, most common damage symptoms and crops affected: The fungus pathogen that is responsible for anthracnose on garlic scapes (Colletotrichum fioriniae), is the same fungus that causes celery anthracnose — described in this pest report from 2019. One theory for the relatively recent appearance of the disease is

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Cutworms

Pest: Cutworms (many species) Pest/disease identification and lifecycle, most common damage symptoms and crops affected: Cutworms are occasional pests of many crops early in the season, including carrots, peas, onions, spinach, broccoli and the list goes on and on. Some years they result in major losses, other years result in no loss at all. They

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Cucurbit Downy Mildew

Pest: Cucurbit downy mildew (Pseudoperonospora cubensis) Pest/disease identification and lifecycle, most common damage symptoms and crops affected: Cucurbit downy mildew can be very destructive of cucumbers, squash, pumpkins and melons, if conditions are favorable to it. This disease does not overwinter here, and its severity in any given season is often dependent upon when it

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Squash Bug

Pest: Squash Bug (Anasa tristis) Pest identification and lifecycle, most common symptoms and crops affected: Squash bugs are serious pests of pumpkins and squash throughout North America. Plant damage, and bug survival, are low on watermelon, very low on cucumber and muskmelon, and highest on squash and pumpkin. Both adults and nymphs feed by inserting

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Squash Vine Borer

Pest: Squash vine borer (Melittia cucurbitae) Pest identification and lifecycle, most common symptoms and crops affected: Squash vine borer moths are day-flying moths with a 1 to 1.5 inch wingspan and bright orange-red markings. In flight, they look like wasps. There is thought to be only one generation per year in New England with adults

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