JPS5925568B2 - bird proof fruit bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fruit bag that prevents fruit from being damaged by birds.

In recent years, evergreen fruit trees (citrus, loquat) and deciduous fruit trees (apple,
Regardless of the type of fruit (such as pears, grapes, oysters, figs, etc.), the movement to produce ``tasty'' products with strong sweetness has been strongly promoted, and in addition, the cultivation of varieties with high sugar content has become popular. Ta.

On the other hand, bird densities have increased rapidly due to bird protection movements.

Due to these interactions, the damage caused by fruit picking by birds occurs not only in fruit grown without bags but also in bags, which are picked from above the bag and become damaged fruits, which are secondarily caused by rotting bacteria. Many of them become parasitic and rot and fall, making it a hindrance to fruit tree cultivation.

Conventional countermeasures include covering orchards with nets or generating special sound waves to prevent birds from flying in to prevent damage from birds.

However, these methods involve large capital investments and suffer from acoustic pollution, making them impractical.

The present invention prevents such bird damage by using fruit bags, and does not impair the effects of conventional fruit bags, which are to protect fruits from pests and diseases, and to protect them from fruit contamination and residual poison from sprayed agricultural chemicals.

Hereinafter, the fruit bag according to the present invention will be explained in detail with reference to the brief explanation of the drawings.

The fruit bag according to the present invention is intended to prevent the damage caused by picking on fruits by addressing the habits and visual blind spots of birds.

In other words, birds sometimes return to their homes to end their day, and their home range is said to be 40 to 80 kIarL for crows and starlings, and 10 to 17 IarL for long-tailed warblers.

The most important thing that supports their lives is the sharpness of their eyes, which allows them to see over long distances.

For example, a type of shrike can even visually identify a mouse from 80 meters away, and birds in general have a strong habit of showing a sharp repellent reaction to nets.

, and color perception differs depending on the species of bird, but in general, it is preferable to long wavelength light rays of 600 mμ ~
Yellow to red fruits of 800 mμ are liked and damaged, but 400 m
Light rays with short wavelengths of .mu. to 550 m.mu., that is, blue to green, have the characteristic of being difficult to perceive or being avoided functionally.

Taking these ecology into consideration, the present invention has applied a hard-to-feel camouflage on the surface of the bag and a line pattern that makes it look like a net, so that the bag does not make you realize that it is a fruit, but on the contrary, it reminds you of a wary net. This is to scare the birds away from approaching the bag.

In the bag 1 according to the present invention, the base paper is treated with one or more types of fungicides and insecticides during papermaking, and a line pattern 2 for bird prevention purposes is applied during or after the papermaking process, or the bag is treated with fungicides and insecticides. After applying the line pattern 2 for bird deterrent purposes on the base paper, it is coated with paraffin wax mixed with one or more fungicides or insecticides, or a water repellent substance, depending on the bird deterrent effect. It is possible to produce a fruit bag that can also prevent and remove pests that damage fruits.

Experimental example 1 A harmful bird that eats flower buds is widely distributed in Japan.
In order to test the bird-preventing effect against "Uso" (Sparrow family), we used 5 peach trees before flowering as test trees and 9 types of experimental bags, 3 each.
00 pieces on March 28th. Randomly hung bags made of Takohana bud board. 10 days later, on April 7th, while removing the bags, the number of bags with scratches caused by "lies" and 1 bag with scratches. The results of investigating the winning even numbers are shown in Table 1.

However, in both cases, pure white paper was decorated with colored patterns and processed with paraffin to make bags.

Experimental example 2 The same nine types of bags above were used for Japanese pear "Shinsui" fruit, each containing 600 bags.
The bags were hung on June 25th, harvested four times on August 7th, 10th, 12th, and 18th, and the results of investigating the number of rented fruits are shown in Table 2. Met.

It was confirmed that the crows responsible for the attack were mainly crows, with only a small number of crows (Corvidae) flying in and causing damage.

However, all bags were made by applying color patterns to pure white paper and processing it with paraffin.

As is clear from the results of the first and second experimental examples, it is a color made by uniformly mixing violet, blue, and green dyes on pure white paper, with an average wavelength of approximately 400
~550 mμ color, visually exhibiting a bluish-green color (
Note that the average wavelength in this specification is a weighted average of the wavelengths of each mixed color.

For example, violet (443 mμ), blue (480 mμ), green (53 mμ)
When dyes of various wavelengths (0 mμ) were applied at a mixing ratio of 3:3:4, the test bags made with a mesh pattern and processed with paraffin showed no damage from being eaten, and the length was shorter than that. A mesh pattern based on the color of the wavelength, that is, violet blue (a color made by evenly mixing violet and blue dyes, with an average wavelength of 400 to 500 mμ)
For example, a bag with a mesh pattern made of a color that is visually an intermediate color between violet and blue, or a monochromatic color whose spectral color falls within the violet or green range is a mesh pattern made of each single color of violet, blue, and green. It is understood that patterned bags are also effective.

Experimental Example 3 A mesh pattern made of an even mixture of violet blue, an even mixture of Sumimako green, and single colors of violet, blue, green, yellow, orange, and red was applied to occupy 25% of the surface area of a white bag. A single-layer bag processed with paraffin, and an even mixture of two colors, violet and blue, on white paper, and violet and blue.
The entire surface of white paper is colored with an even mixture of three colors, blue and green, as well as single colors of yellow, blue, green, yellow, orange, and red, then paraffin-processed, single layer unmounted, and white paraffin paper - heavy 17 A sample bag of seeds is used as a test tree, Japanese pear "Kosui"
Randomly send 600 each on June 28th, September 1st
Appropriately ripe fruits were harvested four times on the 3rd, 16th, 20th, and 23rd, and the fruit damaged by pickling on the bag side was examined.

The results were as shown in Table 3. The birds that were responsible for the damage were mainly ``Saturnidae'' (family Saturnidae), with a small number of ``Japanese long-tailed birds (Corvidae)'' flying in and causing damage.

Experimental Example 4 The same 17 types of bags as in Experimental Example 3 above were hung on 600 bags of Japanese pear "Kosui" fruit on June 28th, and on September 13th, 1
Appropriately ripened tofu were harvested four times on the 6th, 20th, and 23rd, and the free acids in the fruit were analyzed using a rental fee, and the sugar content of the fruit juice was measured using a refractometer, which were used as materials for determining quality. .

From the results of Experimental Example 3 above, it is clear that the present invention has a
Bags that are lined with dye having a wavelength of mμ so that approximately 25% of the surface area is occupied by the dye are more likely to be eaten by harmful birds than bags that are entirely colored with the same dye. It is confirmed that the bird prevention effect is high.

This suggests that from a long distance, birds may misunderstand that the fruit is covered with a net, and hesitate to approach it to pick it up.

In addition, when comparing the fruit free acid and fruit sugar content of bags with lines colored with pigment and bags colored entirely with the same pigment, the fully colored bags had higher acid content and sugar content than the mesh-patterned bags with the same pigment. It is clear that the taste of the fruit is lowered.

This is based on the fact that the entire surface is colored, absorbing and blocking specific light rays, which distorts the physiological functions of the fruit compared to unbagged or white paraffin paper bags. In bags with a line pattern covering about 25 squares, the remaining 75 squares transmit light in the same way as white paraffin paper bags, so it is thought that the decrease in free acid content and sugar content will remain at minimal values.

As mentioned above, from the results of Experimental Examples 1 to 4, when there are too few lines on the fruit bag and when there are too many lines, the damage rate is high in both cases. It is preferable to keep it within this range.

In addition, the bird-proof bag according to the present invention is a double bag, a triple bag,
Furthermore, single-layer bags are made from linear paper coated with paraffin or a water-repellent substance, or double-layer bags are made by layering one or two layers of non-linear paper on the inner layer. This also includes triple bags.

[Brief explanation of the drawing]

FIG. 1 r and n show the bird prevention device according to the present invention not yet mounted. 1...bag, 2...line.

Claims (1)

[Claims] 1 The outermost layer of the fruit bag is a single color with a spectral color in the violet to green range, or an average wavelength of 400 mμ to 5
15-40% of its surface area is covered by a highly light-resistant pigment that is 50 mμ and visually exhibits a color between violet and green.
Bird prevention is not implemented by applying a large number of lines so that the area is occupied.