When is fruit ready to pick? Nature offers different clues

When is fruit ready to pick? Nature offers different clues
This June 26, 2015 photo shows plums nearing maturity growing in an orchard near Langley, Wash. Flesh firmness and color are good clues to determine when they're ripe enough to be picked. (Dean Fosdick via AP)

It takes just a twist of the wrist to determine when pears are ready to come off the tree.

For plums and peaches, flesh firmness is a good way to verify maturity.

Blackberries? Check the color.

Nature offers a wide range of clues about when the time is ripe for harvesting fruit and minimizing losses.

"Tasting may be all that is needed and is the simplest method for determining ripeness," said Leonard Perry, horticulture professor emeritus at the University of Vermont. "Birds eating your fruit, too, is a good sign they are ripe for the picking. Look under an . If a few have fallen to the ground already, most are likely ripe."

Peaches can be picked when they separate easily from the branches. For best flavors, let peaches and apricots mature fully on the tree.

Raspberries and blackberries are prime when the fruit is no longer green and the berries separate easily from the plant.

Mature apples should be firm but yielding. "When you take a bite of an apple, it should be sweet and crisp without any trace of starchiness," said Teryl Roper, a pomology professor at Utah State University. "Skin color helps to determine maturity but it is not always reliable. Seed color is not a reliable indicator of fruit maturity."

Some other guidelines for harvesting fruit:

— Be gentle when picking and storing fruit to avoid bruising, which hastens deterioration and mold. "This is particularly important for very soft raspberries, which should only be stored in shallow containers," Perry said.

— Ripe fruit should have a noticeable aroma.

— Pick early in the day, especially berries. They won't spoil as readily as those picked in full sun and hotter temperatures.

— Fruit to be dried should first ripen fully. Fruit to be cooked or preserved can be picked when slightly green. Cooking or blending can salvage bruised, damaged or over-.

And then there's storage, the other vital half of the fresh fruit equation.

When is fruit ready to pick? Nature offers different clues
This Aug. 1, 2015 photo shows pears growing on a tree near Langley, Wash. Pears will mature on trees but not ripen and if left too long will turn brown inside. Horticulturists say pears need to be harvested, stored for two to four weeks at about 40 degrees Fahrenheit and then be exposed to several days at room temperatures before they are ready for the best eating experience. (Dean Fosdick via AP)

"Once a crop is harvested, it is almost impossible to improve its quality," Kansas State University Cooperative Extension Service horticulturists say in a fact sheet. "Losses of horticultural crops due to improper storage and handling can range from 10 to 40 percent."

The key to successful fruit storage is quick cooling, Roper said: "Pick them and get them cool as quickly as possible."

In general, fruit should not be washed right after harvest, since that can allow disease-carrying organisms to spread from one fruit to another. But fruit should be washed just before it's prepared and eaten, Roper said. "Washing is about removing human pathogens," he said.

Different crops have different storage tolerances. Soft fruits will last only a couple of weeks, while apples and pears can be stored for months.

But be cautious with pears, which will mature on the tree but not ripen, Roper said.

"If pears are left on the tree too long, they turn brown inside," he said. "Pears need to be harvested, stored for two to four weeks at about 40 degrees Fahrenheit, then given two to three days of room temperature before they are ready for the best eating experience."


Explore further

Management practices recommended for specialty cider apples

More information: For more about harvesting and storing fruit, see this fact sheet from University of Vermont Extension: pss.uvm.edu/ppp/articles/fallfruit.html

You can contact Dean Fosdick at deanfosdick@netscape.net

© 2019 The Associated Press. All rights reserved.

Citation: When is fruit ready to pick? Nature offers different clues (2019, July 9) retrieved 11 December 2019 from https://phys.org/news/2019-07-fruit-ready-nature-clues.html
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