Traditional recipes

What Are Those Little Dots on Apples?

What Are Those Little Dots on Apples?

They’re called lenticels, and they serve an important purpose

iStock.com/vladans

Every autumn, along with sweaters, pumpkin spice, cozy soups and comforting recipes, we’ve got apples on our minds. Trips to the market yield a bounty of apple varieties, and when scanning through the options, it’s hard not to notice that some of them are covered with little speckles. These tiny little spots are most evident on varieties like Gala, Fuji, Granny Smith, Golden Delicious and Red Delicious apples, but if you look closely, just about all apples have them. So what are those little specks, exactly, and what do they do?


They’re actually called lenticels, and you can also find them on pears, potatoes, mangoes and avocados as well as many other fruits and vegetables and even trees. According to Science Direct, lenticels are essentially pores; they let oxygen into the fruit while allowing carbon dioxide and water vapor out. These fruits are otherwise airtight, so lenticels play a crucial role in cellular respiration.

If all this sounds a little familiar to you, that’s because humans essentially do the same thing — take in oxygen and let out carbon dioxide. So even though they don’t have lungs, you can say that plants breathe too.

So the next time you shop for apples, take a moment to appreciate how it’s those little speckles that help them breathe (and you can give your kid a crash course on organic chemistry while you’re at it). And when you’re done, you can stock up on some lesser-known and under-appreciated apple varieties.


There are brown streaks in my apples. What is the cause and how can it be prevented?

There are brown streaks in my apples. What is the cause and how can it be prevented?

The brown streaks in the apples are probably due to the apple maggot. The apple maggot is the most serious insect pest of apples in Iowa. Apple maggot damage appears as knobby, misshapen fruit with small pits or blemishes on the fruit surface. In addition, brownish streaks run through the flesh of the apple. The apple maggot is occasionally referred to as the &ldquorailroad worm&rdquo because of the slender brown streaks or tracks in the apple&rsquos flesh.

The apple maggot is a type of fruit fly. Female apple maggot flies insert eggs beneath the skin of fruit from about mid-June until shortly before harvest. The punctures produce small holes that later appear as blemishes on the fruit. Upon egg hatch, the larvae tunnel through the flesh of the apple producing the distinctive brown streaks.

Control of apple maggot is difficult. Picking up and destroying apple maggot infested apples that have fallen to the ground is somewhat helpful. Placing apple maggot traps (red spheres or yellow cards coated with a sticky substance) in apple trees usually provide satisfactory levels of control. Insecticides are the most commonly used method of controlling apple maggots in commercial and home orchards. Insecticides should be applied from mid-June through September. Suitable insecticides for home gardeners include Sevin and any of the home orchard type sprays. Despite regular spraying, apples in many home gardens suffer substantial apple maggot damage due to poor spraying techniques, rainy weather, and other factors.


There are brown streaks in my apples. What is the cause and how can it be prevented?

There are brown streaks in my apples. What is the cause and how can it be prevented?

The brown streaks in the apples are probably due to the apple maggot. The apple maggot is the most serious insect pest of apples in Iowa. Apple maggot damage appears as knobby, misshapen fruit with small pits or blemishes on the fruit surface. In addition, brownish streaks run through the flesh of the apple. The apple maggot is occasionally referred to as the &ldquorailroad worm&rdquo because of the slender brown streaks or tracks in the apple&rsquos flesh.

The apple maggot is a type of fruit fly. Female apple maggot flies insert eggs beneath the skin of fruit from about mid-June until shortly before harvest. The punctures produce small holes that later appear as blemishes on the fruit. Upon egg hatch, the larvae tunnel through the flesh of the apple producing the distinctive brown streaks.

Control of apple maggot is difficult. Picking up and destroying apple maggot infested apples that have fallen to the ground is somewhat helpful. Placing apple maggot traps (red spheres or yellow cards coated with a sticky substance) in apple trees usually provide satisfactory levels of control. Insecticides are the most commonly used method of controlling apple maggots in commercial and home orchards. Insecticides should be applied from mid-June through September. Suitable insecticides for home gardeners include Sevin and any of the home orchard type sprays. Despite regular spraying, apples in many home gardens suffer substantial apple maggot damage due to poor spraying techniques, rainy weather, and other factors.


There are brown streaks in my apples. What is the cause and how can it be prevented?

There are brown streaks in my apples. What is the cause and how can it be prevented?

The brown streaks in the apples are probably due to the apple maggot. The apple maggot is the most serious insect pest of apples in Iowa. Apple maggot damage appears as knobby, misshapen fruit with small pits or blemishes on the fruit surface. In addition, brownish streaks run through the flesh of the apple. The apple maggot is occasionally referred to as the &ldquorailroad worm&rdquo because of the slender brown streaks or tracks in the apple&rsquos flesh.

The apple maggot is a type of fruit fly. Female apple maggot flies insert eggs beneath the skin of fruit from about mid-June until shortly before harvest. The punctures produce small holes that later appear as blemishes on the fruit. Upon egg hatch, the larvae tunnel through the flesh of the apple producing the distinctive brown streaks.

Control of apple maggot is difficult. Picking up and destroying apple maggot infested apples that have fallen to the ground is somewhat helpful. Placing apple maggot traps (red spheres or yellow cards coated with a sticky substance) in apple trees usually provide satisfactory levels of control. Insecticides are the most commonly used method of controlling apple maggots in commercial and home orchards. Insecticides should be applied from mid-June through September. Suitable insecticides for home gardeners include Sevin and any of the home orchard type sprays. Despite regular spraying, apples in many home gardens suffer substantial apple maggot damage due to poor spraying techniques, rainy weather, and other factors.


There are brown streaks in my apples. What is the cause and how can it be prevented?

There are brown streaks in my apples. What is the cause and how can it be prevented?

The brown streaks in the apples are probably due to the apple maggot. The apple maggot is the most serious insect pest of apples in Iowa. Apple maggot damage appears as knobby, misshapen fruit with small pits or blemishes on the fruit surface. In addition, brownish streaks run through the flesh of the apple. The apple maggot is occasionally referred to as the &ldquorailroad worm&rdquo because of the slender brown streaks or tracks in the apple&rsquos flesh.

The apple maggot is a type of fruit fly. Female apple maggot flies insert eggs beneath the skin of fruit from about mid-June until shortly before harvest. The punctures produce small holes that later appear as blemishes on the fruit. Upon egg hatch, the larvae tunnel through the flesh of the apple producing the distinctive brown streaks.

Control of apple maggot is difficult. Picking up and destroying apple maggot infested apples that have fallen to the ground is somewhat helpful. Placing apple maggot traps (red spheres or yellow cards coated with a sticky substance) in apple trees usually provide satisfactory levels of control. Insecticides are the most commonly used method of controlling apple maggots in commercial and home orchards. Insecticides should be applied from mid-June through September. Suitable insecticides for home gardeners include Sevin and any of the home orchard type sprays. Despite regular spraying, apples in many home gardens suffer substantial apple maggot damage due to poor spraying techniques, rainy weather, and other factors.


There are brown streaks in my apples. What is the cause and how can it be prevented?

There are brown streaks in my apples. What is the cause and how can it be prevented?

The brown streaks in the apples are probably due to the apple maggot. The apple maggot is the most serious insect pest of apples in Iowa. Apple maggot damage appears as knobby, misshapen fruit with small pits or blemishes on the fruit surface. In addition, brownish streaks run through the flesh of the apple. The apple maggot is occasionally referred to as the &ldquorailroad worm&rdquo because of the slender brown streaks or tracks in the apple&rsquos flesh.

The apple maggot is a type of fruit fly. Female apple maggot flies insert eggs beneath the skin of fruit from about mid-June until shortly before harvest. The punctures produce small holes that later appear as blemishes on the fruit. Upon egg hatch, the larvae tunnel through the flesh of the apple producing the distinctive brown streaks.

Control of apple maggot is difficult. Picking up and destroying apple maggot infested apples that have fallen to the ground is somewhat helpful. Placing apple maggot traps (red spheres or yellow cards coated with a sticky substance) in apple trees usually provide satisfactory levels of control. Insecticides are the most commonly used method of controlling apple maggots in commercial and home orchards. Insecticides should be applied from mid-June through September. Suitable insecticides for home gardeners include Sevin and any of the home orchard type sprays. Despite regular spraying, apples in many home gardens suffer substantial apple maggot damage due to poor spraying techniques, rainy weather, and other factors.


There are brown streaks in my apples. What is the cause and how can it be prevented?

There are brown streaks in my apples. What is the cause and how can it be prevented?

The brown streaks in the apples are probably due to the apple maggot. The apple maggot is the most serious insect pest of apples in Iowa. Apple maggot damage appears as knobby, misshapen fruit with small pits or blemishes on the fruit surface. In addition, brownish streaks run through the flesh of the apple. The apple maggot is occasionally referred to as the &ldquorailroad worm&rdquo because of the slender brown streaks or tracks in the apple&rsquos flesh.

The apple maggot is a type of fruit fly. Female apple maggot flies insert eggs beneath the skin of fruit from about mid-June until shortly before harvest. The punctures produce small holes that later appear as blemishes on the fruit. Upon egg hatch, the larvae tunnel through the flesh of the apple producing the distinctive brown streaks.

Control of apple maggot is difficult. Picking up and destroying apple maggot infested apples that have fallen to the ground is somewhat helpful. Placing apple maggot traps (red spheres or yellow cards coated with a sticky substance) in apple trees usually provide satisfactory levels of control. Insecticides are the most commonly used method of controlling apple maggots in commercial and home orchards. Insecticides should be applied from mid-June through September. Suitable insecticides for home gardeners include Sevin and any of the home orchard type sprays. Despite regular spraying, apples in many home gardens suffer substantial apple maggot damage due to poor spraying techniques, rainy weather, and other factors.


There are brown streaks in my apples. What is the cause and how can it be prevented?

There are brown streaks in my apples. What is the cause and how can it be prevented?

The brown streaks in the apples are probably due to the apple maggot. The apple maggot is the most serious insect pest of apples in Iowa. Apple maggot damage appears as knobby, misshapen fruit with small pits or blemishes on the fruit surface. In addition, brownish streaks run through the flesh of the apple. The apple maggot is occasionally referred to as the &ldquorailroad worm&rdquo because of the slender brown streaks or tracks in the apple&rsquos flesh.

The apple maggot is a type of fruit fly. Female apple maggot flies insert eggs beneath the skin of fruit from about mid-June until shortly before harvest. The punctures produce small holes that later appear as blemishes on the fruit. Upon egg hatch, the larvae tunnel through the flesh of the apple producing the distinctive brown streaks.

Control of apple maggot is difficult. Picking up and destroying apple maggot infested apples that have fallen to the ground is somewhat helpful. Placing apple maggot traps (red spheres or yellow cards coated with a sticky substance) in apple trees usually provide satisfactory levels of control. Insecticides are the most commonly used method of controlling apple maggots in commercial and home orchards. Insecticides should be applied from mid-June through September. Suitable insecticides for home gardeners include Sevin and any of the home orchard type sprays. Despite regular spraying, apples in many home gardens suffer substantial apple maggot damage due to poor spraying techniques, rainy weather, and other factors.


There are brown streaks in my apples. What is the cause and how can it be prevented?

There are brown streaks in my apples. What is the cause and how can it be prevented?

The brown streaks in the apples are probably due to the apple maggot. The apple maggot is the most serious insect pest of apples in Iowa. Apple maggot damage appears as knobby, misshapen fruit with small pits or blemishes on the fruit surface. In addition, brownish streaks run through the flesh of the apple. The apple maggot is occasionally referred to as the &ldquorailroad worm&rdquo because of the slender brown streaks or tracks in the apple&rsquos flesh.

The apple maggot is a type of fruit fly. Female apple maggot flies insert eggs beneath the skin of fruit from about mid-June until shortly before harvest. The punctures produce small holes that later appear as blemishes on the fruit. Upon egg hatch, the larvae tunnel through the flesh of the apple producing the distinctive brown streaks.

Control of apple maggot is difficult. Picking up and destroying apple maggot infested apples that have fallen to the ground is somewhat helpful. Placing apple maggot traps (red spheres or yellow cards coated with a sticky substance) in apple trees usually provide satisfactory levels of control. Insecticides are the most commonly used method of controlling apple maggots in commercial and home orchards. Insecticides should be applied from mid-June through September. Suitable insecticides for home gardeners include Sevin and any of the home orchard type sprays. Despite regular spraying, apples in many home gardens suffer substantial apple maggot damage due to poor spraying techniques, rainy weather, and other factors.


There are brown streaks in my apples. What is the cause and how can it be prevented?

There are brown streaks in my apples. What is the cause and how can it be prevented?

The brown streaks in the apples are probably due to the apple maggot. The apple maggot is the most serious insect pest of apples in Iowa. Apple maggot damage appears as knobby, misshapen fruit with small pits or blemishes on the fruit surface. In addition, brownish streaks run through the flesh of the apple. The apple maggot is occasionally referred to as the &ldquorailroad worm&rdquo because of the slender brown streaks or tracks in the apple&rsquos flesh.

The apple maggot is a type of fruit fly. Female apple maggot flies insert eggs beneath the skin of fruit from about mid-June until shortly before harvest. The punctures produce small holes that later appear as blemishes on the fruit. Upon egg hatch, the larvae tunnel through the flesh of the apple producing the distinctive brown streaks.

Control of apple maggot is difficult. Picking up and destroying apple maggot infested apples that have fallen to the ground is somewhat helpful. Placing apple maggot traps (red spheres or yellow cards coated with a sticky substance) in apple trees usually provide satisfactory levels of control. Insecticides are the most commonly used method of controlling apple maggots in commercial and home orchards. Insecticides should be applied from mid-June through September. Suitable insecticides for home gardeners include Sevin and any of the home orchard type sprays. Despite regular spraying, apples in many home gardens suffer substantial apple maggot damage due to poor spraying techniques, rainy weather, and other factors.


There are brown streaks in my apples. What is the cause and how can it be prevented?

There are brown streaks in my apples. What is the cause and how can it be prevented?

The brown streaks in the apples are probably due to the apple maggot. The apple maggot is the most serious insect pest of apples in Iowa. Apple maggot damage appears as knobby, misshapen fruit with small pits or blemishes on the fruit surface. In addition, brownish streaks run through the flesh of the apple. The apple maggot is occasionally referred to as the &ldquorailroad worm&rdquo because of the slender brown streaks or tracks in the apple&rsquos flesh.

The apple maggot is a type of fruit fly. Female apple maggot flies insert eggs beneath the skin of fruit from about mid-June until shortly before harvest. The punctures produce small holes that later appear as blemishes on the fruit. Upon egg hatch, the larvae tunnel through the flesh of the apple producing the distinctive brown streaks.

Control of apple maggot is difficult. Picking up and destroying apple maggot infested apples that have fallen to the ground is somewhat helpful. Placing apple maggot traps (red spheres or yellow cards coated with a sticky substance) in apple trees usually provide satisfactory levels of control. Insecticides are the most commonly used method of controlling apple maggots in commercial and home orchards. Insecticides should be applied from mid-June through September. Suitable insecticides for home gardeners include Sevin and any of the home orchard type sprays. Despite regular spraying, apples in many home gardens suffer substantial apple maggot damage due to poor spraying techniques, rainy weather, and other factors.