What are the common pest and disease control measures for pear trees?
The snow pear that everyone eats is very sweet and also contains very high nutritional value, but the pear tree is a tree species that is very prone to disease. Below, the editor will introduce to you common pest and disease control measures for pear trees.
The common types of pests and diseases of pear trees include pear scab, pear rust, pear psyllid, pear yellow aphid, and so on. The specific control methods are as follows:
I. Control of pear scab
Pear scab, also known as scab disease, is highly epidemic. Pear scab is a major disease of pear trees, and all young and tender tissues of pear trees are especially susceptible to infection. It is an important disease that occurs commonly in pear-growing areas across northern and southern China and causes large losses, damaging trees from the petal fall stage all the way to the fruit ripening stage.
Control: Combining flower and fruit thinning with pruning off diseased shoots can prevent pear tree disease to a large extent; 7 to 10 days after pear petals fall, use 40% Fuxing at 8000 to 10000 times dilution for control; for pear trees that are already diseased, spray with 80% mancozeb at 800 times dilution.
II. Control of pear rust
Pear rust, also known as red spot disease, will harm pear tree leaves, new shoots and fruit when it occurs. Diseased leaves of pear rust first show small yellow spots, which gradually expand into oval shapes. In the late stage of infection, the diseased spots on pear leaves turn black and die.
Control: From leaf expansion to the young fruit stage of pear trees, spray once every 10 days or so with a solution of 40% Fuxing diluted 8000 to 10000 times; 2-3 times is enough to restore the pear tree to health.
III. Control of pear psyllid
Pear psyllid generally does not cause serious damage, and is only more severe in scenic areas and city suburbs where juniper-type trees are planted in large numbers near orchards. It occurs in both northern and southern fruit-growing areas of China. It can not only harm pear trees, but also cause damage to plants such as Tang pear, flowering quince, crabapple and hawthorn. Adult pear psyllids can harm pear leaves and young shoots, and induce pear sooty mold, leading to pear defoliation, degraded fruit quality, and even fruit drop and reduced yield.
Control: Spray pear leaves and branches with 1250 to 1500 times dilution of Chongmanke and 3000 times dilution of Kangfuduo. Manual capture of the insects on pear trees can also be used.
IV. Control of pear yellow aphid
The larvae and adults of the pear yellow aphid mainly feed on pear fruit and reproduce inside the fruit. Affected pear fruit develops small yellow sunken spots, which gradually turn dark brown.
Control: From March to May, the overwintering eggs hidden on pear trees can be eliminated by scraping off the loose bark; after the overwintering eggs hatch and in late June, spray pear trees with 25% Kuaishate at 1500 to 2000 times dilution for control.
Because the diseases of pear trees are generally contagious, once a pear tree is found to be diseased, it must be treated promptly. We hope the above four common pest and disease control measures for pear trees can help you. Finally, the editor wishes that all the pear trees you plant stay free from pests and diseases.