Prepare for the Onslaught of Japanese Beetles

That whirring noise you might be hearing isn’t a plane in the distance, instead it’s the approach of one hungry pest: The Japanese beetle. You’re likely seeing damage in your gardens, soybeans or corn, it’s time to scout to see exactly how bad the damage is.

The pest first emerges in late May or early June, reaching its peak emergence just over one month later, according to Wyffels Hybrids research. The average beetle adult lives 30 to 60 days and lays eggs frequently—up to four eggs every three days. Larvae overwinter, emerging when soil temperature exceeds 50 degrees.

Corn Management

If you see Japanese beetles in your corn fields it could mean poor pollination is imminent. The pest loves to snack on corn’s delicate silks—and if they clip them to ½” or less the crop might not pollinate.

Consider a foliar insecticide treatment during tasseling and silking if there are three or more beetles per ear, silks are clipped to ½” and pollination is less than 50% complete, according to Eileen Cullen, University of Wisconsin Extension entomologist.

“[If applying an insecticide] beetles must be on the outside of the ear, which is normally the case,” Cullen says “The main concern with Japanese beetle feeding is to protect silks for pollination.”

Scouting tips in corn and soybeans, source: University of Wisconsin
Soybean Management

Japanese beetles have colossal appetites, and soybean leaves make for a satisfying snack. If they eat too much it might mean you need to consider insecticide treatment.

According to Purdue Extension, Japanese beetles skeletonize soybeans leaves, striping tissue between larger leaf veins but eating smaller veins. Sample fields to determine if you’ve met threshold. When sampling, take 20 sweeps with a sweep net in five areas of the field and count the number of beetles. Then, determine defoliation for the field as a whole.

Consider an insecticide treatment if beetles are actively feeding and there is 30% defoliation prior to bloom or 20% defoliation during flowering or pod fill.

Soybean defoliation

Check out what farmers and agronomists are seeing across the Midwest:


Restricted HTML

  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <blockquote cite> <code> <ul type> <ol start type> <li> <dl> <dt> <dd> <h2 id> <h3 id> <h4 id> <h5 id> <h6 id>
  • Lines and paragraphs break automatically.
  • Web page addresses and email addresses turn into links automatically.
Submitted by Acacia on Fri, 07/20/2018 - 22:39

Japanese beetle. I can see the damage in your garden, soya or corn has been devastated.
duck life

Submitted by marketing on Sat, 07/21/2018 - 02:07

dealer honda tegal
honda tegal raya
honda mobil tegal
sales honda tegal
honda tegal
dealer mobil honda tegal
harga mobil honda tegal
honda slawi
honda mobil slawi
dealer honda slawi
honda brebes
dealer honda mobil brebes
promo honda brebes
kredit mobil honda brebes
harga mobil honda brebes
dealer honda brebes
honda pemalang
honda mobil pemalang
harga mobil honda pemalang
dealer honda pemalang
honda pekalongan
dealer honda pekalongan
dealer mobil honda di pekalongan
honda pekalongan motor
no telepon dealer honda pekalongan
honda mobil pekalongan

rental mobil surabaya
sewa mobil surabaya
sewa mobil surabaya murah
harga rental mobil surabaya
sewa mobil surabaya barat
rental mobil surabaya 2018
rental mobil surabaya 24 jam
harga sewa mobil surabaya
rental mobil surabaya timur
sewa elf surabaya
sewa elf surabaya murah
rental elf surabaya
harga sewa elf surabaya
sewa elf sidoarjo
sewa hiace surabaya

nasmoco kedu
nasmoco magelang
dealer nasmoco magelang
dealer toyota magelang
toyota nasmoco magelang
alamat nasmoco magelang
sales toyota magelang
harga mobil toyota di magelang
nasmoco temanggung
toyota nasmoco temanggung
dealer toyota temanggung
alamat nasmoco temanggung
harga mobil toyota temanggung
sales toyota temanggung
nasmoco purworejo
toyota nasmoco purworejo
dealer toyota purworejo
alamat nasmoco purworejo
sales nasmoco purworejo
nasmoco kebumen
dealer toyota kebumen
dealer mobil toyota di kebumen
alamat nasmoco kebumen
marketing toyota kebumen
promo toyota kebumen

tour travel purwokerto
biro wisata purwokerto
tour and travel purwokerto
biro perjalanan purwokerto
agen tour purwokerto
paket tour purwokerto
paket wisata baturaden purwokerto
harga paket wisata baturaden purwokerto
tour pendakian purwokerto
harga paket wisata purwokerto
rental mobil purwokerto
sewa mobil purwokerto
biro wisata purbalingga
agen tour purbalingga
tour and travel purbalingga
tour and travel cilacap
biro wisata banjarnegara
agen tourwonosobo
tour and travel dieng
paket tour dieng
tour dieng murah
paket tour dieng 2018
paket wisata dieng 2 hari 1 malam
paket wisata dieng 3 hari 2 malam
paket wisata dieng backpacker
harga paket wisata dieng