Apply Tanglefoot to Fruit Tree Trunks for Ant and Crawling Insect Control. 5.3.15

Tanglefoot and polyethylene strips.  5.3.15

 This is a good time of year to apply Tanglefoot to fruit tree trunks.  It's  well in advance of fruit ripening, but after most of the Spring rains.

For figs, the Tanglefoot prevents ants from climbing the trunk and entering ripe figs.  Without the Tanglefoot, my figs invariably have some added crunch, that seems to move around on the tongue.  In addition to being odd, infection by ants also seems to cause mold spoilage of the figs before they fully ripen.  I suspect the ants carry mold spores.

For cherries, Tanglefoot prevents black aphids.  My theory there is ants farm the aphids.  Either that or, the black aphids climb the trunk themselves.  Whatever the case, the Tanglefoot prevents them.

I also apply to apples, pears, and peaches.  The treatment does not stop problems caused by flying insects, but does stop problems caused by tree-climbing insects.

I don't know that tanglefoot applied directly to the trunk is harmful.  It is messy, sticky, and next to impossible to remove.  I wrap tightly with 6-inch-wide strips of light-weight polyethylene.  The strips are cut from disposable grocery store bags.  They are too flimsy to girdle the trunk.  I wrap twice, then tie with a square knot.  Then apply Tanglefoot, squeezing a strip from the tube like toothpaste, and spread on the plastic wrapping using a disposable plastic spoon. 

Being very cheap, I save the plastic spoons from my work place lunch.  I usually take my own flatware, but sometimes forget.

Wrapping fig tree trunk.  5.3.15

During the winter, I remove the Tanglefoot.   By then, it is covered with dust, dirt, plant material, and ineffective at stopping insects.   The polyethylene bags are flimsy enough, to simply pull off the tree trunks.

Alternatively, one could apply sticky plastic tape, sticky-side out.  I would not use duct-tape, which is too tough and might girdle the tree.

Tree protected with Tanglefoot.  5.3.15

Winter Project: Apple bags. 12.17.14

I haven't had as much success as I would like, with apples.  I get them to the point where lots of apples are forming.  Then a lot go to pot.  Distorted, wormy, shrunken apples.  Liberty is pretty good, not much disease or insect damage.  North Pole, one of my older trees with lots of apples, almost never yields an edible apple.  They are distorted and gnarled looking.  Jonagold, very few usable apples.  I got a good apple from my tiny Golden Sentinel apple last year.

The issue is disease and insect related.  From what I read, commercial orchards spray and spray and spray and spray.  Even organic orchards have their organic sprays.  I've been trying my backyard apples with no spray.

Reading about the options, some gardeners insert each developing apple into a modified ziplock bag.  The bag serves as an impermeable shield against most insects and disease.  The result is a vastly improved yield of edible, supposedly perfect, apples.  An added benefit, they ripen 2 weeks earlier.  Some gardeners staple the bags in place.  Others think that is not needed.  One writer refers to this as a "Ziplock® Orchard"

The concept of bagging apples is common in Japan, where a large fraction of the crop is bagged.  They use opaque bags, which must be removed to allow color formation and ripening.   They also apply stencils, which prevent color formation under the design, resulting in a yellow tattoo on a red apple.  The Japanese apples bring a high price premium, but it is happening less now because of the labor involved.  Young rural Japanese people have other things to do, than bag apples.  Prior to use in Japan, in the past century apples were bagged in France.

The apple bags are super easy and quick to make.  A box of sandwich-size zipper bags costs a couple of dollars, generic.  Mine came to a little over 1 cent per bag.

Use a sharp scissors.  Cut the 2 bottom corners, for drainage of any water that leaks into the bag.

Cut off the top flaps, because the zipper will go around the apple stem.  Most stems are too short to accommodate the top flaps.  Open the bag before cutting the flaps, or it's a trial to get open.

I prepared 200 for next spring, then put them in my gardening cabinet.  Spring is busy, better to make them now.  I doubt I'll need anything near 200, but there they are.

From the articles I read -

#The bags do not result in overheating the apples.  But the apples do wind up larger and ripen about 2 weeks sooner.

#Insects and disease do not enter through the cuts.  Rarely an insect enters around the stem.

#Some apples might have a not-perfect smudgy appearance.  That is not clear - the same author stated, so did their non-bagged apples.

#The bags must be applied very early - just after petal drop.  Thin the fruit at the same time.  If applying bags when the apples are larger than, say, a dime, then some insect and disease damage may be beginning, and you are locking the barn door after the horse was stolen.

#Based on my readings, bags work for solid fruits, like apples, pears, quince. But not for soft fruits, like peaches and plums, which may rot.

#The bags are not 100% effective, and work better in some climates than others.  Where they do work, they are much cheaper than spraying.  It's possible the bags are less effort than repeated spraying, especially with dwarf trees - no ladders.  With bags instead of sprays, you are not indiscriminately killing both harmful and beneficial insects by spraying everything, especially since multiple sprays seem to be needed.   So, both carnivorous insects, and pollinating insects both live to do their important jobs, and you can promote a beneficial garden ecosystem.

#Other types of bags, such as paper, are more trouble.  Rain and wind are more damaging to paper bags.  The bags must be removed for fruit to color properly.

#The zipper bags can be left on the fruit for storage.  According to my readings, the fruit will last longer than non-bagged fruits.

#I wonder if paw paws would ripen a couple weeks earlier too?  If mine set this year, I might try.

So this project is done.  It will be summer before I know if it works.   I have not done this before, so I can't vouch for the method.  Several writers swear by it.

Preventive measure: Tanglefoot for ants and aphids

Every year, I discover ants in the figs. It's not too bad - slice open and wash them out. If you miss a few, the ants have a nice crunchy texture and nutty flavor. However, the ants carry fungal spores, and it seems that the ant-infested figs also spoil before they reach their ultimate sweetness. Every year, I tell myself that "next year" I'll prevent the ant infestation.

Same with the cherries. Every summer, the leaves develop massive black cherry aphid infestations. I suspect that the ants cultivate the aphids. AFTER I see them, I get out the tanglefoot, but by then a lot of damage is done.

So this year WILL BE DIFFERENT! I actually did remember. What's up with that! Tanglefoot is great at stopping the ants from climbing the trees, and no toxic chemicals.

The instructions state to wrap the tree tightly with plastic, before applying the tanglefoot. I cut wide strips from plastic grocery store bags. These have enough stretch to make snug, bark-tight bands. They also tear quite easily, so there is no risk of girdling the tree with them. They start to deteriorate in about a year, which is time for the new coating.

I use a disposable plastic knife to apply the Tanglefoot. It's very gooey. Next to impossible to wash out of clothing.

I applied the same treatment to the pears, apples, cherries, and figs. The reason for also applying to the apples and pears is to reduce spread of disease by aphids.