The Largest Natural Enemy of Goji berry – Aceria macrodonis Keifer

Natural Enemy of Goji berry

English Name: Aceria macrodonis Keifer

Family: Arachnida Acarina Eriophyidae

Harmful plants: goji berry (Lycium barbarum L.)

Growing part: stem, leaf, flower and fruit

Characteristics: Leaf discoloration, page deformity

Aceria macrodonis Keifer

Aceria macrodonis Keifer belongs to Arachnida, Acarina and Eriophyidae. goji berry – Lycium barbarum is mainly distributed in Ningxia, Inner Mongolia, Gansu, Xinjiang, Shanxi, Shaanxi and Qinghai provinces. This insect is a common pest. The gall mite of goji berry – Lycium barbarum harms the leaves, buds, young fruits, tender stems, petals and petals of goji berry – Lycium barbarum. The flower buds can not blossom and bear fruit after being injured. The leaf surface is not even. In serious cases, the growth of the whole tree weakens, fruit and leaves fall off, resulting in yield reduction. There are 15-25 galls in seriously injured leaves, which seriously affects the yield and quality of goji berry – Lycium barbarum.

ium barbarum is mainly distributed in Ningxia, Inner Mongolia, Gansu, Xinjiang, Shanxi, Shaanxi and Qinghai provinces. This insect is a common pest. The gall mite of goji berry – Lycium barbarum harms the leaves, buds, young fruits, tender stems, petals and petals of goji berry – Lycium barbarum. The flower buds can not blossom and bear fruit after being injured. The leaf surface is not even. In serious cases, the growth of the whole tree weakens, fruit and leaves fall off, resulting in yield reduction. There are 15-25 galls in seriously injured leaves, which seriously affects the yield and quality of goji berry – Lycium barbarum.

Goji berry – Lycium barbarum goji berry – is mainly distributed in Ningxia, Inner Mongolia, Gansu, Xinjiang, Shanxi, Shaanxi and Qinghai provinces. This insect is a common pest. The gall mite of Lycium barbarum harms the leaves, buds, young fruits, tender stems, petals and petals of Lycium barbarum. The flower buds can not blossom and bear fruit after being injured. The leaf surface is not even. In serious cases, the growth of the whole tree weakens, fruit and leaves fall off, resulting in yield reduction. There are 15-25 galls in seriously injured leaves, which seriously affects the yield and quality of goji berry – Lycium barbarum.

Aceria macrodonis Keifer

Morphological character:
Adults: about 0.3 mm in length, orange-yellow, long conical, slightly downward curved bow-shaped body, the front is thicker, there are two pairs of feet, which is different from other family mites, so it is also known as tetrapod mites. The head and chest are short, protruding forward, with a pair of mandibular whiskers beside them, consisting of three sections. Foot 5, with a pinnate claw at the end. There are about 53 rings in the abdomen, forming a long and narrow link. The link on the back is consistent with the link on the abdomen, connecting it into a loop of the body, which is characteristic of this genus (the other genus has one back ring and is divided into several small rings on the abdomen). There are l pairs of back bristles at the front of the abdomen, l pairs of side bristles at the side, 3 pairs of abdomen bristles at the abdomen, and 1 pair of adsorber and bristles at the tail, which are longer than other bristles. There is also a pair of hair on the inside.
Egg: 3.9 micron in diameter, spherical, light white and transparent.
Larvae: The nymph is like an adult mite, but its body length is shorter than that of an adult mite, but it is very short. Its middle part is wide and its back is short. Its front end has four feet and mouth organs, such as flower receptacles, which are light white to light yellow and translucent.
Nymph: longer than larvae, shorter than adults, the shape has approached adults.

Aceria macrodonis Keifer

Occurrence regularity:
When the buds of goji berry – Lycium barbarum open in mid-and late April, adult mites migrate from the wintering site to the newly developed tender leaves to find suitable locations, suck juice on the reverse side of the leaves, destroy the tissues, and make them gradually depressed. After the surface heals, the adults penetrate into the mesophyll tissues, feed on and stimulate the mesophyll tissues to make them irregular. It grows normally and then lays eggs in it. After hatching, the young mite feeds on it. It does not get rid of gall until adults. At this time, the gall rises on the front of the leaf like a nevus. The nevus changes from green to reddish brown and purple gradually. It spreads to new shoot hazard in mid-late May, transfers to autumn shoot hazard in mid-late August and enters overwintering period in mid-November.

Aceria macrodonis Keifer

Prevention and treatment methods:
Agricultural control: In early spring and late autumn, the remnants, withered, disease and insect branches pruned together with the litter around the garden are cleared and concentrated on burning out the source of insects outside the garden. The unification of Qingyuan in spring can greatly reduce the population base of overwintering insects.
Physical control: It is found that a large number of gall branches and leaves should be removed in time and destroyed centrally in order to avoid gall mites spreading to other plants. Spraying biomimetic gum in early spring and late autumn can effectively prevent the migration of gall mites from overwintering, thus reducing the population base of overwintering insects.
Chemical control: The key to control is to determine the control period and select appropriate pesticides. Spraying pesticides before and after the overwintering of adult mites when gall mites appear in large quantities can control the gall mites of goji berry – Lycium barbarum by using 1.8% avermectin 3000 times or 20% daidzein 750 times.

Aceria macrodonis Keifer

Biological control: Acaris oryzae is the predominant natural enemy of Acaris oryzae. The protection and application of this natural enemy should be paid attention to.

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