In terms of production, some fruit farmers have unclear identification of the hazards and occurrence patterns of P. pulcherrima and P. grandiflora, resulting in incorrect prevention and control measures and often miss the best opportunity for prevention and control, which will affect the production of fruit trees. The harm symptoms, occurrence regularity, and prevention and control methods of the two pests are described below for reference. I. Pear heartworm 1. Harmful symptoms. The pear larvae of pear borer plucked from the pear candied fruit and stem and reached the fruit heart. The fruit victim suffered a black spot on the surface of the fruit, and the black hole was blackened and rotted around the back boring hole. The larvae formed only a small hole. However, there is no insect feces and there is a large amount of insect feces in the fruit. 2. The law of occurrence. Pyrosphaeridae occured in North China for 3-4 generations in 1 year. The first and second generation larvae mainly attacked peach shoots, and the third and fourth generation larvae mainly attacked pear fruits, all of which are mature larvae in the branches and leaves of the gaps and trees. The soil around the hole and trunk neck was overwintering. The wintering period is from early April to early May; the first generation is from late May to mid-June; the second is from late June to early July; the third is from late July to early August, and the fourth is from late August to late. In mid-September. 3. Control methods. 1 Agricultural control. Reasonably configure tree species and avoid planting with peach, pear, plum and apricot when building a garden. (2) Trapping and killing adult worms: The adult larvae are baited by using the pear sex-feeding pheromone pheromone lure, and 3-5 lure pheromones per mu are exchanged for about 40 days. Sex attractant suspension height of 1.5 meters, can be used large mouth plastic cup, the greater the amount of trapping the more the cup, the cup of water, the distance from the water to the mouth of the cup 2 cm, put a small amount of washing powder in the water, the distance from the core to the water 0.5 Meter, water should be added at any time after evaporation of water in the cup. 3 timely and thoroughly remove the tip of insects and buried deep in the fruit. 4 sweet and sour liquid, black light trap. The ratio of sweet and sour liquid is: 5 parts of sugar, 20 parts of vinegar, 3 parts of wine and 80 parts of water. Adults are trapped and killed at adult stage. 5 Trichogramma bees were released: Four bees were released each time during the spawning period of the second and third generations of adults, and the second generation of the fourth generation was followed by two bee releases of 21,000 bees per acre. 6 chemical control: Available 30% peach Xiaoling 1500-2000 times liquid, 20% speed kill Ding 1000-1500 times liquid, 2.5% kangfu chrysanthemum 1500-2000 times liquid, 1.8% A Wei insect clear 2500-3000 times liquid , 25% Diflubenzuron 3 2000-2500 times liquid and other agents. In general, depending on the insect condition, apply 2-3 times alternately on the tree, 10-15 days apart. Second, pear big heartworm 1. Harmful symptoms. The larvae feed on buds, flower clusters, leaf clusters, and fruits, and invade from the base of the bud, causing the buds to die. After fruiting period in young fruit period, the common wire is used to wrap the fruit on the shoots, the inward hole is larger, the insect excrement is outside the hole, the handle and branches of the victim fruit are detached, but the fruit does not fall. 2. The law of occurrence. P. orientalis larvae occurred in two generations in North China in one year, and both larvae survived in winter. In the spring, the buds invade and turn buds inflated, and they turn fruit in young fruit. General damage l-3 buds, 2-3 fruit. The larvae invade from the base of the bud and invade from the top of the young fruit. The larvae are larger, and often there are a large number of insect excrement holes. After the larvae are mature, the larvae become larvae in the last damaged fruit, and the eclosion hole is used as the eclosion before the larvae are released. About 10 days of the pupa period, adult eclosion is in the early June, and the egg period is 5-7 days. The eggs are first milky yellow and the hatching time is pink. The first generation larvae are endangered between June and August. Fruit or axillary bud damage. Second-generation adults emerged from August to September. The larvae spend their winters from August to September. 3. Control methods. 1 Protect natural enemies. Parasitoids have a great inhibitory effect on P. grandis. Therefore, these natural enemies should be protected as much as possible during the prevention and control. 2 chemical control. Three key periods are mainly captured: overwintering larvae turn buds, transfer fruit, and adults spawning. During the harmful period of spraying, the spraying should be controlled when the flower buds are green, and the spraying should be carried out at about 90% of the Xiehua. Can be used 2.5% kumquat 3000 times solution, phoxim emulsion 1000 times, 45% high efficiency cypermethrin or 2.5% Kung Fu EC 3000 times and other control. 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