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Insects are actually as good as people (of course, for people, insects are not good or evil), and these beneficial insects are quietly working hard for the abundance of fruit growers. But when it comes to pesticides (which should be nuclear weapons for insects), they are no exception and have also ascended to the sky. Among them is such a beneficial insect, it has a green and soft body, four large and transparent wings, flying slowly (a backhand slap can be slapped to death), it is a grasshopper. Today Xiaobian will talk about it.
<h1>Introduction to grasshoppers</h1>
Grasshopper is actually a collective name for nearly 100 species (only recorded in China) such as large grasshopper, Chinese grasshopper, leaf-colored grasshopper, licao flycatcher and so on. This mainly refers to the large grasshoppers that are widely distributed in various regions except Tibet and Inner Mongolia in China. The life of the grasshopper consists of four periods of eggs, larvae, pupae and adult insects, except for the two stages that cannot be eaten or drunk, other times it feeds on other insects (only a few grasshoppers feed on nectar), like aphids, mesozoans, red spiders, leafhoppers, wood lice, whiteflies, various butterflies, moth eggs and young larvae are on his recipe, so it is a beneficial insect.
<h1>Larval stage</h1>
Grasshopper larvae are spindle-shaped, yellow-brown, gray-brown or russet-brown, and grow slightly ugly. The large double jaws are particularly fierce to catch and eat, and even kill each other, so people call the grasshoppers in the larval stage as aphid lions. In addition, he is also a hunchback, nicknamed the hunchback worm; probably because he does not want to show the defects of the body, he will usually collect some dried leaf chips, wood slag, aphid carcasses and so on his back, so he has another name for garbage worms (the aphid lion has fainted in the toilet).
Although the aphid lion has no wings, it is very active, and it is either eating all day long or on the way to eat (and Xiaobian is like ah). According to statistics, an aphid lion can eliminate an average of 800 aphids in the entire larval stage (about 60 days) !
<h1>Adult stage</h1>
From the end of April, grassflies began to feather into adult worms, and the grassflies that came out of the cocoon had soft waists, tender green throughout, dotted with black markings, a pair of eyes, flowing with metallic light, slender antennae like silk, wings like yarn, and some similarities with dragonflies, so it was also called grass dragonflies. Don't look at his slender and soft appearance, think that he is a little fairy who only drinks nectar, from its recipes, he is still a carnivore (individual grasshopper adults feed on nectar and pollen), and its appetite has become better, and it can eat more than a hundred aphids a day on average.
<h1>Collaborative approach</h1>
Patient children's shoes can even collect their eggs to bring back to their orchards, and their eggs are connected to a filament and stand on the attachment, which is very recognizable, and may be found on the leaves and window frames.
In addition, now there is also a treasure on the sale of grasshoppers live, if you buy it is recommended that you buy eggs, larvae and adults generally can not withstand long-distance transportation.
Finally, please try not to hurt them when you find them in the garden.
<h1>Precautions</h1>
Grasshoppers are not the more the better. Because grasshoppers have a competitive relationship and are very ferocious, they are prone to cannibalism when the density is large. Therefore, grasshoppers are generally released according to the number of insect mouths in the field, and 1 grasshopper is released from 50 pests, and 5000-6000 grasshoppers are generally released per acre.
With the use of natural enemies to control insects, it is necessary to pay attention to controlling the use of pesticides during their active period (May to November). Grasshoppers are sensitive to touch-killing agents, and special attention should be paid to the use of touch-killing pesticides. Pesticides such as organophosphorus, carbamate vinegar, urea and cypermethrin should be eliminated. Grasshoppers have strong resistance to organochlorine and permethrin pesticides and can be controlled. As for microbial insecticides, plant extracts, acaricides and fungicides, they have no obvious effect on grasshoppers, but they are normal to use.