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What are the control methods for apple Phytophthora fruit rot?
This spring, the temperature in my area was lower than usual and there was more rain than usual, causing severe outbreaks of apple Phytophthora fruit rot. Apple Phytophthora fruit rot, also known as apple Phytophthora disease, can harm apple fruit; the skin of affected fruit first looks as if scalded by hot water, then turns brown, and the flesh rots. It can also attack the tree
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What are the control methods for the mango green stinging caterpillar?
1. Taxonomic status The mango green stinging caterpillar, also known as the brown-edged green stinging caterpillar [Parasa consocia Walker], belongs taxonomically to the order Lepidoptera, family Limacodidae. 2. Hosts and damage characteristics Its hosts are relatively widespread, damaging mango, banana, citrus, peach, plum, plum, persimmon, Chinese chestnut, cherry, apple, pear
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Control Methods for Mango Sooty Mold and Algal Leaf Spot
(1) Mango sooty mold: 1. Symptoms: This disease mainly occurs on leaves and fruit. A layer of black fuzzy material covers the surface of leaves and fruit, resembling soot, hence the name sooty mold. In severe cases, the entire leaf and fruit are covered by mycelium (soot). This type of
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What are the control methods for mango scale insect pests?
This pest is distributed in Guangdong, Hainan and Guangxi, and is a locally sporadic major pest, causing damage only in a few orchards. It can damage the branches, leaves and fruits of parts of the canopy, sucking the sap from their tissues, causing leaf drop and fruit drop, and in severe cases causing premature decline of the tree.
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What are the control methods for citrus flat-headed borer?
The citrus flat-headed borer (Agrilus auriventris) has one generation per year in the Chenggu area, overwintering as larvae of various instars inside the branches and trunks of citrus trees. In late March, the larvae bore into the xylem and begin to pupate; mid-to-late April is the peak pupation period, with the pupal stage lasting about 25 days. Early May is the peak emergence period for adults, and mid-May
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What are the control methods for the Oriental fruit fly (Bactrocera dorsalis)?
[Morphological characteristics] The adult is 6-8 mm long with a wingspan of 16 mm, and the whole body is alternately dark black and yellow. The thorax has a total of 11 pairs of bristles, mostly yellowish-brown, including 2 pairs of scapular bristles, 2 pairs of dorsocentral bristles, 1 pair of presutural bristles, 2 pairs of postsutural bristles, 1 pair of mesopleural bristles, 1 pair of pteropleural bristles, 1 pair of prescutellar bristles, and 1 pair of scutellar bristles. The abdomen is oval, with 4 segments in males and 5 segments in females. The ovipositor is well developed, but its length is less than half of the abdomen, and the narrow posterior portion is shorter than the fifth abdominal segment. The egg is spindle-shaped, slightly pointed at one end, slightly curved, about 1 mm long and about 0.1 mm wide, milky white. Larva: the first-instar larva is 1.2-1.3 mm long, the second instar is 2.5-5.8 mm, and the third instar is 7.0-11 mm. The first-instar larva is semi-transparent, the second and third instars are milky white, and the mature larva after the third instar is orange-yellow. The body is conical, small and pointed at the front end, the mouth hooks are black, and the button-shaped structure on the inner side of the spiracular plate is relatively large and obvious. The pupa is oval, about 5 mm long and about 2.5 mm wide, light yellow.
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What are the control methods for citrus canker?
Citrus canker Xanthomonas citri (Hasse) Dowson is a bacterial disease that seriously damages citrus, and has been listed as a plant quarantine object at home and abroad. After plants are infected, the tree vigor weakens, and leaves and fruits drop easily; thus reducing yield and affecting fruit quality. Seedlings
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What are the control methods for citrus fruit flies?
The citrus fruit fly is a major pest harming citrus fruit. After the fruit is damaged, it softens, turns yellow, rots and drops. When the infestation is severe, it can cause the orchard to have no harvest at all. It can be seen year-round, with July to October as the peak period of damage, and there is no overwintering phenomenon. The female lays eggs in ripe
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How to prevent and control citrus fruit cracking? Master these cultivation techniques
Every year in June and July, after the second physiological fruit drop, citrus generally does not drop fruit, but then fruit cracking of varying degrees occurs. The peak period of fruit cracking generally occurs in early August and in the two periods from late August to early September. Citrus fruit cracking is one of the important physiological diseases of citrus during the fruit-swelling period.
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How to prevent and control arrowhead scale damage to young fruit when growing citrus
The citrus arrowhead scale is currently one of the main pests in citrus orchards in eastern Guangdong and northern Guangdong, with more than 50% of the orchard area in these regions affected to varying degrees, impacting production. The author conducted systematic fixed-point, regular observations of the occurrence of the citrus arrowhead scale, and carried out
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