Speaking of scarab beetles, I believe many friends have heard of it, but this is just a general term for insects of the Coleoptera family, and today's main introduction is one of the species, called the Apple Mawer Scarab Turtle, also known as the Apple Scarab Beetle, which belongs to the Coleoptera family. This pest larval period will damage the buds, buds and young branches of fruit trees and other crops, often destroying the fruits of the farmer's uncle's hard work, which is very irritating.
In order to effectively prevent the impact of pests, it is necessary for fruit growers to understand it in detail in order to achieve targeted prevention and make the fruit industry bigger and stronger. The introduction of this pest will introduce the host, symptoms, characteristics and control methods, and hope to help all fruit growers and friends in preventing insect pests.
Apple maurice turtle
First, the distribution and host of apples and hosts Apple maoli golden turtle in China's northeast, north China, northwest and other places have occurred, the main host is harmful apples, pears, peaches, plums, apricots, cherries, walnuts, chestnuts, grapes and other fruit trees and a variety of forest trees, there are planting such fruit trees farmers need to pay attention to.
2. Symptoms of pest The adult apple-haired golden turtle eats the buds, buds and young leaves of pear trees, and the main harm is the pear orchard and isolated and remote orchard in the mountain, and the larvae are also harmful to the young roots of the fruit trees in the soil after hatching.
Apple-haired golden turtle is a pest of pear buds
III. Morphological characteristics In addition to the small shield and elytra wings, the adult apples are densely covered with yellow-white villi, and the elytra are brownish yellow, and the hindwings can be folded into a "V" shape from the elytra wings. The eggs are milky white, oval in shape, and have a smooth surface.
Scarab beetle mature larvae body length of about 15 mm, head yellow-brown, chest, abdomen milky white, the head of the front of the parietal bristles each 7 to 8, arranged in a longitudinal column, posterior apical bristles 10 to 11, arranged in a not very neat oblique column, forehead bristles each into a 1 oblique horizontal column, no hip plate.
The spike column in the middle of the hook-like bristle group at the back of the ventral patch of scarab is composed of short cone-like and long needle-like spines, with 5 to 12 short cone-like spiny hairs on each side, most of which are 7 to 8, and 5 to 13 long needle-like spiny hairs, most of which are 7 to 8, and the two columns of thorn hairs are neatly arranged.
The pupa is a naked pupae, initially white, then gradually brown, about 12 to 14 mm long, and becomes dark reddish brown before feathering.
Apple beetle
IV. Living Habits The Apple Mauri Golden Turtle occurs in one generation per year, and the adults overwinter in the soil layer of 30 to 50 cm and the deepest 74 cm. Overwintering adults emerge in early April of the following year during the budding stage of fruit trees, and the bud stage is the most affected.
After the apple flowers (mid-May), the adult insect activity stops, the scarab beetle adult eats for about 10 days, and the tail is generally carried out at a high temperature, the initial stage is 13 to 14 pm, and the late stage is at 8 to 9 am.
Scarab beetles start laying eggs in mid-April, with the peak spawning period in late April and the end in mid-May. The eggs hatch after 27 to 31 days, and the end of May to the beginning of June is the peak of larval hatching.
Apple-haired scarab beetles are harmful to pear blossoms
The 1st to 2nd instar larvae live in a soil layer of 10 to 15 cm, and after the 3rd instar, they begin to move down to a soil layer 20 to 30 cm deep, preparing to pupate. Mid-to-late August is the pupal peak. Feathering begins in early September and feathering begins in mid-September. Feathered adult insects do not emerge in the same year, that is, they overwinter deep in the soil layer and move up to the spring of the following year when the apples and pears sprout.
Adult apples have pseudo-death and no phototropism, so they can be hunted collectively in the morning and evening by shaking the tree, and the effect is very good.
Apple-haired golden turtle is harming flower buds
Fifth, prevention and control methods
1. Artificial hunting During the adult occurrence of scarab beetles, using its suspended animation habits, organize manpower to knock on trees in the early morning or evening to vibrate insects, and use plastic sheets or reeds under the trees to pick up insects and concentrate on elimination. In addition to hunting in the pear orchard, it is carried out simultaneously on other trees around the pear orchard, and the effect is even greater.
Apple-haired golden turtle larvae
2, soil treatment with 5% octyl thiophos granules, per 667m²2kg, has a good effect. The amount of non-intercropping drugs outside the orchard tree tray can be slightly increased, and the effect is better when treated at the initial stage of adult insects.
3, spray to protect the flowers In the pear tree flowers contain buds, that is, 2 days before flowering, spray 50% malathion emulsion 1000 ~ 2000 times liquid, or use 75% octyl thiophos emulsion 1000 ~ 2000 times liquid, the insecticidal effect is very good.
Spray before flowering in fruit trees to preserve flowers
The above is about today's introduction of the pest apple turtle related information and control methods, fruit tree management or rely on the early prevention of the main, after the victimization can only play a timely control effect, so whether it is insect pests or diseases, you need to grasp its characteristics in advance prevention. If you have better suggestions or comments, please leave a message in the comment area for everyone to learn and discuss together.