Methods of preventing and treating Kang's powder scale disease of Ligustrum lucidum

The damage of Ligustrum lucidum occurred in the past, which caused the death of a large area of Ligustrum lucidum at that time. Good results have been achieved through research and control in recent years.

Kang's pink scale is also known as mulberry pink scale. Its eggs are generally laid between petioles and branches, oval, light orange, dozens of eggs concentrated into blocks, forming white floc oocysts. Three generations a year. The first generation nymphs flourished in mid-late May, the second generation in mid-late July, and the third generation from late August to early September.

It is mainly harmed by female worms and nymphs, which mostly attach to the connection between leaves or branches and petioles and absorb the sap of the plant. the lightly damaged parts form black spots or black spots, and the serious ones cause the whole plant to atrophy and die.

Prevention and control methods:

1. Strengthen quarantine: strictly implement the quarantine system and do not introduce insect-carrying seedlings. Do not take scions or cuttings from worm-carrying seedlings.

two。 Scientific management: try not to be strongly pruned during the growing period. For neatness and consistency, pruning must be carried out. After pruning, you need to spray protective pesticides such as 1500 times mancozeb or 1000 times carbendazim every 5 to 7 days, 3 to 4 times continuously. At ordinary times, it is necessary to strengthen management, pay attention to ventilation, rational fertilization, scientific watering, enhance tree potential and disease resistance.

3. Timely observation: often check the insect situation, check whether there are white flocs, early detection, timely prevention and control.

4. Chemical control: the effect of chemical control is good in the peak egg hatching period or the first instar nymph stage, the scale is commonly used to kill 1000 times of liquid, 1000 to 1500 times of rapid culling solution is sprayed every 5 to 7 days, continuous use of 2 to 3 times, all of them can be eradicated. When spraying, pay attention to spraying the whole plant (including diseased plants and healthy plants), and evenly apply medicine on both sides of the leaves; when the number of damaged plants is small, wet cotton balls soaked in rice vinegar or alcohol can be used to wipe the harmful places repeatedly, which can kill the nymphs completely, and the effect is very good.

5. Protect natural enemies: pay attention to protect and utilize the natural enemies of shell insects, such as parasitoids, ladybugs, lacewings and so on.

6. Eliminate adults: combined with winter pruning to eliminate adults to avoid the occurrence of a large number of nymphs in the coming spring.

The Kangshi pink scale of Ligustrum lucidum and its control in Hengshui, Hebei Province, caused the death of a large area of Ligustrum lucidum at that time. Good results have been achieved through research and control in recent years.

Pseudococcas Constock, also known as mulberry pink scale. Its eggs are generally laid between petioles and branches, oval, light orange, dozens of eggs concentrated into blocks, forming white floc oocysts. Three generations a year. The first generation nymphs flourished in mid-late May, the second generation in mid-late July, and the third generation from late August to early September.

It is mainly harmed by female worms and nymphs, which mostly attach to the connection between leaves or branches and petioles and absorb the sap of the plant. the lightly damaged parts form black spots or black spots, and the serious ones cause the whole plant to atrophy and die.

Prevention and control methods:

1. Strengthen quarantine: strictly implement the quarantine system and do not introduce insect-carrying seedlings. Do not take scions or cuttings from worm-carrying seedlings.

2 Scientific management: try not to be strongly pruned during the growing period, if you want to be neat and consistent, you must prune. After pruning, you need to spray protective pesticides such as 1500 times mancozeb or 1000 times carbendazim every 5 to 7 days, 3 to 4 times continuously. At ordinary times, it is necessary to strengthen management, pay attention to ventilation, rational fertilization, scientific watering, enhance tree potential and disease resistance.

3. Timely observation: often check the insect situation, check whether there are white flocs, early detection, timely prevention and control.

4. Chemical control: the effect of chemical control is good in the peak egg hatching period or the first instar nymph stage, the scale is commonly used to kill 1000 times of liquid, 1000 to 1500 times of rapid culling solution is sprayed every 5 to 7 days, continuous use of 2 to 3 times, all of them can be eradicated. When spraying, pay attention to spraying the whole plant (including diseased plants and healthy plants), and evenly apply medicine on both sides of the leaves; when the number of damaged plants is small, wet cotton balls soaked in rice vinegar or alcohol can be used to wipe the harmful places repeatedly, which can kill the nymphs completely, and the effect is very good.

5. Protect natural enemies: pay attention to protect and utilize the natural enemies of shell insects, such as parasitoids, ladybugs, lacewings and so on.

6. Eliminate adults: combined with winter pruning to eliminate adults to avoid the occurrence of a large number of nymphs in the coming spring. Control of Ligustrum lucidum

Hengshui Ligustrum lucidum in Hebei Province was once harmed by Pseudococcas Constock, which caused the death of a large area of Ligustrum lucidum at that time. Good results have been achieved through research and control in recent years. Its eggs are generally laid between petioles and branches, oval, light orange, dozens of eggs concentrated into blocks, forming white floc oocysts. Three generations a year. The first generation nymphs flourished in mid-late May, the second generation in mid-late July, and the third generation from late August to early September.

It is mainly harmed by female worms and nymphs, which mostly attach to the connection between leaves or branches and petioles and absorb the sap of the plant. the lightly damaged parts form black spots or black spots, and the serious ones cause the whole plant to atrophy and die.

Prevention and control methods:

1. Strengthen quarantine: strictly implement the quarantine system and do not introduce insect-carrying seedlings. Do not take scions or cuttings from worm-carrying seedlings.

2. Scientific management: try not to prune strongly during the growing period. In order to be neat and consistent, pruning must be carried out. After pruning, it is necessary to spray protective pesticides such as 1500 times mancozeb or 1000 times carbendazim every 5 to 7 days, 3 to 4 times continuously. At ordinary times, it is necessary to strengthen management, pay attention to ventilation, rational fertilization, scientific watering, enhance tree potential and disease resistance.

3, timely observation: often check the insect situation, check whether there are white flocs, early detection, timely prevention and treatment.

4. Chemical control: the effect of drug control is good in the peak egg hatching period or the first instar nymph stage. Scale killing 1000 times solution and quick culling solution of 1000 to 1500 times are sprayed every 5 to 7 days and continuously used for 2 to 3 times, all of them can be eliminated. When spraying, pay attention to spraying the whole plant (including diseased plants and healthy plants), and evenly apply medicine on both sides of the leaves; when the number of damaged plants is small, wet cotton balls soaked in rice vinegar or alcohol can be used to wipe the harmful places repeatedly, which can kill the nymphs completely, and the effect is very good.

5. Protect natural enemies: pay attention to protect and utilize the natural enemies of shell insects, such as parasitoids, predatory ladybugs, lacewings and so on.

6. eliminate adults: combined with winter pruning to eliminate adults to avoid the occurrence of a large number of nymphs in the coming spring.