Organic Methods to Save Your Grape Plants From Pests


Symptoms: Adult Beetles come into vineyards when new shoots are about 1 foot (30 cm) long. Eggs are laid inside shoots about 6 inches (15 cm) from tips. Larvae tunnel inside shoots, destroying them.

Cure: Inspect canes and cut off about 4 inches (10 cm) below girdling area.


Symptoms: Moth larvae feed inside fruits. Grapes are often webbed together. Wormy fruits result.

Cure: Set out pheromone traps to know when to spray with organic Bacillus thuringiensis var. kurstaki.


Symptoms: Larvae of moths feed on foliage of new shoots, chewing them badly. They may also feed on fruits.

Cure: Spray with organic neem in early summer. Repeat 2 weeks later.


Symptoms: Adult beetles feed heavily on foliage during day, causing severe skeletonizing of leaves.

Cure: Handpick adult beetles. Spray vines with organic neem to deter beetles from feeding. Place pheromone traps downwind away from the vines.


Symptoms: Fungus attacks leaves in early summer and later appears on fruits that are half grown. Entire grape shrivels to dry, black, raisinlike fruit.

Cure: Infection occurs during bloom period. Apply copper spray just before bloom, after bloom and every 10 to 14 days thereafter up to early fall. Remove mummified fruit and destroy.


Symptoms: Fungus, one of most destructive of all grape diseases, first attacks leaves and canes; later it infects young shoots. Dead arm phase results from infection through wounds caused by pruning or winterkill.

Cure: Remove infected vine at ground level during winter pruning. Spray with Bordeaux mixture when new shoots are about 1.2 inches (3 cm) long and again when they are 4.7 inches (12 cm) long.


Symptoms: First appears as small yellow spots on top of leaves. Later, downy white mats appear on lower surfaces. Complete defoliation may occur. Grapes are attacked, harden and turn off-color.

Cure: Same program as for black rot (above).

Grapes with mold© iStockphoto/ThinkstockCommon grape ailments are easy to treat.


Symptoms: Mildew occurs on foliage in early summer and fall, producing white powdery growth on leaves and fruits.

Cure: Organic sulfur sprays should be applied as needed.

  • Republished from:

    The Canadian Illustrated Guide to Gardening

    buy NOW$59.96

Become more interesting every week!

Get our Read Up newsletter

how we use your e-mail

Some people like to travel by train because 
it combines the slowness of a car with the cramped public exposure of 
an airplane.

Dennis Miller

I think my pilot was a little inexperienced. We were sitting on the runway, and he said, “OK, folks, we’re gonna be taking off in a just few—whoa! Here we go.”

Kevin Nealon

“I can’t wait until your vacation is over.” 
—Everyone following you on Instagram


A man knocked on my door and asked for a donation toward the local swimming pool. So I gave him a glass of water.

Comedian Greg Davies

Funny Jokes

Just found the worst page in the entire dictionary. What I saw was disgraceful, disgusting, dishonest, and disingenuous.


Funny Jokes

Client: We need you to log in to the YouTube and make all our company videos viral.


Funny Jokes

My cat just walked up to the paper shredder and said, “Teach me 
everything you know.”


Funny Jokes

“Just because you can’t dance doesn’t mean you shouldn’t dance.” 

@yoyoha (Josh Hara)

Funny Jokes

My parents didn’t want to move to Florida, but they turned 60 and that’s the law.

—Jerry Seinfeld

Funny Jokes

Q: What do you call an Amish guy with his hand in a horse’s mouth?

A: A mechanic.