Japanese Beetle - Revision history

Gjmaltbi at 18:30, 2 May 2025

2025-05-02T18:30:15Z

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Gjmaltbi at 18:29, 2 May 2025

2025-05-02T18:29:40Z

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Gjmaltbi at 18:28, 2 May 2025

2025-05-02T18:28:54Z

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	[5] Hahn, J., J. Weisenhorn, and S. Bugeja. (n.d.). "Japanese beetles in yards and gardens." https://extension.umn.edu/yard-and-garden-insects/japanese-beetles.		[5] Hahn, J., J. Weisenhorn, and S. Bugeja. (n.d.). "Japanese beetles in yards and gardens." https://extension.umn.edu/yard-and-garden-insects/japanese-beetles.

	[6] Held, D., P. Gonsiska, and D. Potter. 2003. Evaluating Companion Planting and Non-host Masking Odors for Protecting Roses from the Japanese Beetle ([[Coleoptera]]: Scarabaeidae). Journal of economic entomology 96:81–7.		[6] Held, D., P. Gonsiska, and D. Potter. 2003. Evaluating Companion Planting and Non-host Masking Odors for Protecting Roses from the Japanese Beetle ([[Coleoptera]]: [[Scarabaeidae]]). Journal of economic entomology 96:81–7.

	[7] Held, D. W., and D. A. Potter. 2004. Floral affinity and benefits of dietary mixing with flowers for a polyphagous scarab, Popillia japonica Newman. Oecologia 140:312–320.		[7] Held, D. W., and D. A. Potter. 2004. Floral affinity and benefits of dietary mixing with flowers for a polyphagous scarab, Popillia japonica Newman. Oecologia 140:312–320.

Gjmaltbi at 04:47, 8 March 2025

2025-03-08T04:47:06Z

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	== Description ==		== Description ==

	[[File: ~~Japanese~~ Beetle ~~identify~~.jpg\|~~Japanese Beetle]] [[File:June Bug.jpg\|June Bug\|June Bug]] [[File: Emerald June Bug.jpg\|Emerald June Bug~~]]		[[File: Beetle Comp.jpg\|Difference between beetles]]

	Adult Japanese beetles can be recognized by their iridescent copper-colored elytra, their green thorax and head, 5 patches of white hair on each side of the abdomen, and one pair on the last abdominal segment. The Japanese beetle adults are 0.6" (15mm) in length and 0.4" (10mm) in width. They may be confused with native June Bugs of North America, who can have similar body structure and coloration. June Bugs however tend to be larger and have more reddish brown coloration.		Adult Japanese beetles can be recognized by their iridescent copper-colored elytra, their green thorax and head, 5 patches of white hair on each side of the abdomen, and one pair on the last abdominal segment. The Japanese beetle adults are 0.6" (15mm) in length and 0.4" (10mm) in width. They may be confused with native June Bugs of North America, who can have similar body structure and coloration. June Bugs however tend to be larger and have more reddish brown coloration.
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	[[File: Japanese Beetle identify.jpg]]		[[File: Japanese Beetle identify.jpg]]
	[[File: Japanese Beelte swarm.jpg]]		[[File: Japanese Beelte swarm.jpg]]
	[[File: Japanese Beetle.jpg]]		[[File: Japanese Beetle.jpg\| Japanese Beetle]]
	[[File:June Bug.jpg\|~~Caption~~]]		[[File:June Bug.jpg\|June Bug]]
	[[File: Emerald June Bug.jpg\|options\|~~caption~~]]		[[File: Emerald June Bug.jpg\|options\|Emerald June Bug]]
			[[File: Beetle Comp.jpg\|Difference between beetles]]

	== References ==		== References ==

Gjmaltbi: /* Description */

2025-03-08T04:35:28Z

Description

← Older revision		Revision as of 00:35, 8 March 2025
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	== Description ==		== Description ==

	[[File: Japanese Beetle identify.jpg\|Japanese Beetle]] [[File:June Bug.jpg\|June Bug\|June Bug]][[File: Emerald June Bug.jpg\|Emerald June Bug]]		[[File: Japanese Beetle identify.jpg\|Japanese Beetle]] [[File:June Bug.jpg\|June Bug\|June Bug]] [[File: Emerald June Bug.jpg\|Emerald June Bug]]

	Adult Japanese beetles can be recognized by their iridescent copper-colored elytra, their green thorax and head, 5 patches of white hair on each side of the abdomen, and one pair on the last abdominal segment. The Japanese beetle adults are 0.6" (15mm) in length and 0.4" (10mm) in width. They may be confused with native June Bugs of North America, who can have similar body structure and coloration. June Bugs however tend to be larger and have more reddish brown coloration.		Adult Japanese beetles can be recognized by their iridescent copper-colored elytra, their green thorax and head, 5 patches of white hair on each side of the abdomen, and one pair on the last abdominal segment. The Japanese beetle adults are 0.6" (15mm) in length and 0.4" (10mm) in width. They may be confused with native June Bugs of North America, who can have similar body structure and coloration. June Bugs however tend to be larger and have more reddish brown coloration.


	== Lifecycle ==		== Lifecycle ==

Gjmaltbi: /* Control methods */

2025-03-08T04:33:03Z

Control methods

← Older revision		Revision as of 00:33, 8 March 2025
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	== Control methods ==		== Control methods ==
	Row coverings can be used to protect plants ~~from the Japanese beetles~~ during the 6 to 8 week feeding period when the adult beetles are feeding which can vary depending on the temperature. This will keep pollinators out as well, so hand-pollinating may need to be implemented, or the row covers can be removed after the feeding period is over.		Row coverings can be used to protect plants during the 6 to 8 week feeding period when the adult beetles are feeding, which can vary depending on the temperature. This will keep pollinators out as well, so hand-pollinating may need to be implemented, or the row covers can be removed after the feeding period is over.

	Hand-picking the beetles is the most effective way to remove ~~the beetles~~ but is not practical for large plots. In home gardens this can be the most effective. For this method a jar filled with soapy water can be used to dispatch the picked off beetles.		Hand-picking the beetles is the most effective way to remove them but is not practical for large plots. In smaller areas such as home gardens, this can be the most effective. For this method, a jar filled with soapy water can be used to dispatch the picked off beetles.

	Geraniums can be used to protect other vulnerable plants. The beetles are attracted to geraniums, when they eat the blossoms they get dizzy from the natural chemicals in the geranium and fall off the plant. They can then be collected from the ground and disposed of.		Geraniums can be used to protect other vulnerable plants. The beetles are attracted to geraniums, when they eat the blossoms they get dizzy from the natural chemicals in the geranium and fall off the plant. They can then be collected from the ground and disposed of.

	Japanese beetle traps can also be used but they can attract more beetles as well. They are best used in large populations of beetles, on the border of agricultural areas, and placed downwind. Even though the traps are effective they can be detrimental if placed wrong as they can attract more beetles to the plants nearby ~~the traps~~.		Japanese beetle traps can also be used but they can attract more beetles as well. They are best used in large populations of beetles, on the border of agricultural areas, and placed downwind. Even though the traps are effective they can be detrimental if placed wrong as they can attract more beetles to the plants nearby.

	There are a few biological controls that can be used to remove the beetles. Milky spores, a fungal disease can be introduced to the soil to control the larvae population. The grubs will ingest the spores as they feed in the soil and they will reproduce inside the larvae and kill ~~the larvae~~ in 7-21 days. The spores remain viable in the soil for years, which is important as a spore count must be up for 2 to 3 years to be effective. This treatment can be very expensive as all soil within five-eighths of a mile needs to be treated for good control, and may need to be treated multiple times to keep the spore count high enough in the soil to be effective. Parasitic wasps, specifically ''Tiphia vernalis'', will attack larvae, but they are not very effective in reducing the beetle population as a whole.		There are a few biological controls that can be used to remove the beetles. Milky spores, a fungal disease can be introduced to the soil to control the larvae population. The grubs will ingest the spores as they feed in the soil and they will reproduce inside the larvae and kill them in 7-21 days. The spores remain viable in the soil for years, which is important as a spore count must be up for 2 to 3 years to be effective. This treatment can be very expensive as all soil within five-eighths of a mile needs to be treated for good control, and may need to be treated multiple times to keep the spore count high enough in the soil to be effective. Parasitic wasps, specifically ''Tiphia vernalis'', will attack larvae, but they are not very effective in reducing the beetle population as a whole.

	== Hostplants ==		== Hostplants ==

Gjmaltbi at 05:51, 7 March 2025

2025-03-07T05:51:40Z

← Older revision		Revision as of 01:51, 7 March 2025
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	The '''Japanese Beetle''' (''Popillia japonica'') is a species of scarab beetle that is native to Japan. While in Japan, their impact and influence are kept in check by their natural predators. However in the United States, it acts as an invasive species that is a known pest of about 350 species of plants. Adult beetles damage plants by consuming the leaf material between the veins, effectively skeletonizing the plant leaves. This will greatly impact a plant's ability to thrive and survive. They may also feed on any present fruit also on the plant. The subterranean larvae feed in the roots of plants primarily grasses.

			The '''Japanese Beetle''' (''Popillia japonica'') is a species of scarab beetle that is native to Japan. While in Japan, their impact and influence are kept in check by their natural predators. However in the United States, it acts as an invasive species that is a known pest of over 300 species of plants. Adult beetles damage plants by consuming the leaf material between the veins, effectively skeletonizing the plant leaves. This will greatly impact a plant's ability to thrive and survive. They may also feed on any present fruit also on the plant. The subterranean larvae feed in the roots of plants primarily grasses.



	== Description ==		== Description ==

			[[File: Japanese Beetle identify.jpg\|Japanese Beetle]] [[File:June Bug.jpg\|June Bug\|June Bug]][[File: Emerald June Bug.jpg\|Emerald June Bug]]

	Adult Japanese beetles can be recognized by their iridescent copper-colored elytra, their green thorax and head, 5 patches of white hair on each side of the abdomen, and one pair on the last abdominal segment. The Japanese beetle adults are 0.6" (15mm) in length and 0.4" (10mm) in width. They may be confused with native June Bugs of North America, who can have similar body structure and coloration. June Bugs however tend to be larger and have more reddish brown coloration.		Adult Japanese beetles can be recognized by their iridescent copper-colored elytra, their green thorax and head, 5 patches of white hair on each side of the abdomen, and one pair on the last abdominal segment. The Japanese beetle adults are 0.6" (15mm) in length and 0.4" (10mm) in width. They may be confused with native June Bugs of North America, who can have similar body structure and coloration. June Bugs however tend to be larger and have more reddish brown coloration.

	~~[[File: Japanese Beetle identify.jpg\|Japanese Beetle]] [[File:June Bug.jpg\|June Bug]] [[File: Emerald June Bug.jpg\|Emerald June Bug]]~~

	== Lifecycle ==		== Lifecycle ==
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	[[File:June Bug.jpg\|Caption]]		[[File:June Bug.jpg\|Caption]]
	[[File: Emerald June Bug.jpg\|options\|caption]]		[[File: Emerald June Bug.jpg\|options\|caption]]


	== References ==		== References ==

Gjmaltbi at 05:21, 7 March 2025

2025-03-07T05:21:36Z

@@ Line 1: / Line 1: @@
 The '''Japanese Beetle''' (''Popillia japonica'') is a species of scarab beetle that is native to Japan. While in Japan, their impact and influence are kept in check by their natural predators. However in the United States, it acts as an invasive species that is a known pest of about 350 species of plants. Adult beetles damage plants by consuming the leaf material between the veins, effectively skeletonizing the plant leaves. This will greatly impact a plant's ability to thrive and survive. They may also feed on any present fruit also on the plant. The subterranean larvae feed in the roots of plants primarily grasses.
@@ Line 21: / Line 41: @@
 == Lifecycle ==
-The female adults lay their ova (eggs) individually or in small clusters near the surface of the [[soil]]. In about two weeks the larvae hatch and will feed on fine [[plant roots]] and other organic materials present. As the larvae mature and grow they become c-shaped grubs and will feed on larger plant roots. During this stage, the larvae can cause economic damage by destroying the roots of plants in pastures and turf.
+[[File: Japanese Beetle Life cycle.jpg|right]] The female adults lay their ova (eggs) individually or in small clusters near the surface of the [[soil]]. In about two weeks the larvae hatch and will feed on fine [[plant roots]] and other organic materials present. As the larvae mature and grow they become c-shaped grubs and will feed on larger plant roots. During this stage, the larvae can cause economic damage by destroying the roots of plants in pastures and turf.
 Larvae hibernate in small patches of soil and emerge in the spring when soil temperatures rise. After breaking hibernation it takes 4-6 weeks for the larvae to pupate. The adults feed on leaf material aboveground, casuing the leaves to become patchy. This feeding is harmful to the plant but it can recover if not severe. The feedings however can be severe as they release pheromones to attract other beetles and can overwhelm plants, skeletonizing all of it's leaves. The beetles will alternate daily between mating, feeding, and ovipositing (laying ova). An adult female may lay as many as 40-60 ova in a lifetime.
-Most of the beetle's life is in the larval stage, with only 30-45 days spent as an adult beetle. Throughout most of the beetle's range, its life cycle takes one full year. But in the northern extent of its range as well as high altitude zones its development may take two years.
+Most of the beetle's life is in the larval stage, with only 30-45 days spent as an adult beetle. Throughout most of the beetle's range, its life cycle takes one full year. But in the northern extent of its range as well
 == Range ==
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 == Hostplants ==
 The larvae of Japanese beetles feed on the roots of many genera of grasses, the adults consume on leaves of a much wider range of hosts, including many common crops: bean, cannabis, strawberry, tomato, grape, hop, rose, cherry, corn and many more.
+[[File: Japanese Beelte swarm.jpg|right]]
 === List of adult beetle hostplant genera ===
 * ''Abelmoschus''

Gjmaltbi: added more images

2025-03-07T00:12:02Z

added more images

← Older revision		Revision as of 20:12, 6 March 2025
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	The female adults lay their ova (eggs) individually or in small clusters near the surface of the [[soil]]. In about two weeks the larvae hatch and will feed on fine [[plant roots]] and other organic materials present. As the larvae mature and grow they become c-shaped grubs and will feed on larger plant roots. During this stage, the larvae can cause economic damage by destroying the roots of plants in pastures and turf.		The female adults lay their ova (eggs) individually or in small clusters near the surface of the [[soil]]. In about two weeks the larvae hatch and will feed on fine [[plant roots]] and other organic materials present. As the larvae mature and grow they become c-shaped grubs and will feed on larger plant roots. During this stage, the larvae can cause economic damage by destroying the roots of plants in pastures and turf.

	[[File: Life stages of Japanese Beetle.jpg]]		[[File: Life stages of Japanese Beetle.jpg]] [[File: Japanese Beetle Life cycle.jpg]] [[File: Japanese Beelte swarm.jpg]]

	Larvae hibernate in small patches of soil and emerge in the spring when soil temperatures rise. After breaking hibernation it takes 4-6 weeks for the larvae to pupate. The adults feed on leaf material aboveground, casuing the leaves to become patchy. This feeding is harmful to the plant but it can recover if not severe. The feedings however can be severe as they release pheromones to attract other beetles and can overwhelm plants, skeletonizing all of it's leaves. The beetles will alternate daily between mating, feeding, and ovipositing (laying ova). An adult female may lay as many as 40-60 ova in a lifetime.		Larvae hibernate in small patches of soil and emerge in the spring when soil temperatures rise. After breaking hibernation it takes 4-6 weeks for the larvae to pupate. The adults feed on leaf material aboveground, casuing the leaves to become patchy. This feeding is harmful to the plant but it can recover if not severe. The feedings however can be severe as they release pheromones to attract other beetles and can overwhelm plants, skeletonizing all of it's leaves. The beetles will alternate daily between mating, feeding, and ovipositing (laying ova). An adult female may lay as many as 40-60 ova in a lifetime.

Gjmaltbi: Changed some sentences, changed photo formats

2025-03-07T00:05:25Z

Changed some sentences, changed photo formats

← Older revision		Revision as of 20:05, 6 March 2025
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	Adult Japanese beetles can be recognized by their iridescent copper-colored elytra, their green thorax and head, 5 patches of white hair on each side of the abdomen, and one pair on the last abdominal segment. The Japanese beetle adults are 0.6" (15mm) in length and 0.4" (10mm) in width. They may be confused with native June Bugs of North America, who can have similar body structure and coloration. June Bugs however tend to be larger and have more reddish brown coloration.		Adult Japanese beetles can be recognized by their iridescent copper-colored elytra, their green thorax and head, 5 patches of white hair on each side of the abdomen, and one pair on the last abdominal segment. The Japanese beetle adults are 0.6" (15mm) in length and 0.4" (10mm) in width. They may be confused with native June Bugs of North America, who can have similar body structure and coloration. June Bugs however tend to be larger and have more reddish brown coloration.

	[[File: Japanese Beetle identify.jpg]] [[File:June Bug.jpg\|~~Caption~~]] [[File: Emerald June Bug.jpg\|~~options\|caption~~]]		[[File: Japanese Beetle identify.jpg\|Japanese Beetle]] [[File:June Bug.jpg\|June Bug]] [[File: Emerald June Bug.jpg\|Emerald June Bug]]
	~~Japanese Beetle June Bug (Native) Emerald June Bug (Native)~~
	== Lifecycle ==		== Lifecycle ==
	The female adults lay their ova (eggs) individually or in small clusters near the surface of the [[soil]]. In about two weeks the larvae hatch and will feed on fine [[plant roots]] and other organic materials present. As the larvae mature and grow they become c-shaped grubs and will feed on larger plant roots. During this stage, the larvae can cause economic damage by destroying the roots of plants in pastures and turf.		The female adults lay their ova (eggs) individually or in small clusters near the surface of the [[soil]]. In about two weeks the larvae hatch and will feed on fine [[plant roots]] and other organic materials present. As the larvae mature and grow they become c-shaped grubs and will feed on larger plant roots. During this stage, the larvae can cause economic damage by destroying the roots of plants in pastures and turf.

	[[File: Japanese Beetle ~~Life cycle~~.jpg]]		[[File: Life stages of Japanese Beetle.jpg]]

	Larvae hibernate in small patches of soil and emerge in the spring when soil temperatures rise. After breaking hibernation it takes 4-6 weeks for the larvae to pupate. The adults feed on leaf material aboveground by skeletonizing plant leaves. This feeding is harmful to the plant but it can recover if the feeding is not severe. The feeding of the beetles can be severe as they release pheromones to attract other beetles and can overwhelm plants skeletonizing all of its leaves. The beetles will alternate daily between mating, feeding, and ovipositing (laying ova). An adult female may lay as many as 40-60 ova in a lifetime.

	Most of the beetle's life is in the larval stage, with only 30-45 days spent as an adult beetle. Throughout most of the beetle's range, its life cycle takes one full year~~, but~~ in ~~extreme~~ northern ~~parts~~ of its range as well as high altitude zones its development may take two years.		Larvae hibernate in small patches of soil and emerge in the spring when soil temperatures rise. After breaking hibernation it takes 4-6 weeks for the larvae to pupate. The adults feed on leaf material aboveground, casuing the leaves to become patchy. This feeding is harmful to the plant but it can recover if not severe. The feedings however can be severe as they release pheromones to attract other beetles and can overwhelm plants, skeletonizing all of it's leaves. The beetles will alternate daily between mating, feeding, and ovipositing (laying ova). An adult female may lay as many as 40-60 ova in a lifetime.
			Most of the beetle's life is in the larval stage, with only 30-45 days spent as an adult beetle. Throughout most of the beetle's range, its life cycle takes one full year. But in the northern extent of its range as well as high altitude zones its development may take two years.

	== Range ==		== Range ==