Practical experience in pest control for apricot cultivation

Apricot kernel wasp: The larvae overwinter inside fallen apricot pits or inside apricot pits on branches. The female adult lays eggs between the pit shell and the kernel. The egg-laying hole on the fruit surface is not obvious, slightly grayish-green and sunken, and sometimes apricot gum flows from the egg-laying hole. The egg stage is about 10 days. The hatched larvae feed on the apricot kernel inside the pit, causing a large number of fruit drops. They mature around early June and then overwinter and oversummer inside the apricot pit. Control methods: 1. Pick up fallen fruit, remove fruit from the trees, and bury deeply or burn them in a centralized manner to eliminate overwintering larvae. 2. Deep plow and deep till the soil (depth required 15 cm) and turn the infested fruit under the soil so that adults cannot emerge from the soil (larvae can still emerge normally from a soil layer 3.5 cm deep). 3. When processing apricot kernels, burn the infested pits selected out by water in a centralized manner. 4. In early May, during the peak emergence period of adults, spray 90% crystalline trichlorfon at 1000 times dilution.

Peach fruit borer: The larvae damage the fruit. After hatching, the larvae bite through the fruit skin and bore into the fruit, tunneling back and forth and feeding until they reach the fruit core. The damaged fruit accumulates insect frass and becomes bitter and inedible. Control methods: 1. Before overwintering larvae emerge from the soil, sprinkle 50% fenitrothion emulsifiable concentrate at 2000 times dilution in the tree basin, then deep plow once. 2. Remove diseased fruit and dispose of it at any time. 3. During the concentrated hatching period of larvae, spray the leaves with 2000 times 50% methyl parathion emulsifiable concentrate or 1500-2500 times fenvalerate. 4. Use peach fruit borer sex pheromone lures or blacklight traps to trap and kill adults.

Tent caterpillar: Mainly the larvae feed on tender buds and new leaves. When they occur in large numbers, they can eat all the leaves on the tree, affecting flower bud differentiation and fruit set the following year. Control methods: 1. Combined with winter pruning, cut off egg masses and burn them. 2. When the larvae have just hatched, gently pick off the leaves on which they gather and eliminate them in a centralized manner. 3. Spray the leaves with 50% dichlorvos at 1000 times dilution or 40% dimethoate at 1000 times dilution to kill the leaf-feeding larvae.

Green leafhopper: Adults and nymphs suck the sap of leaves and cause damage. When laying eggs in late autumn, they use the ovipositor to cut open the epidermis of fruit tree branches and trunks, causing the damaged branches to be covered with cuts and leading to excessive water loss from the tree. Control methods: 1. For fruit trees with a large number of overwintering eggs, especially young trees, use a wooden stick to press the egg nests and eliminate the overwintering eggs. 2. Pay attention to clearing field weeds to reduce intermediate hosts. 3. When adults and nymphs occur, spray the leaves with 50% dichlorvos at 2000 times dilution or 40% deltamethrin emulsifiable concentrate at 2000 times dilution.

Oxya chinensis? No, flat thorn moth: The larvae gnaw on leaves and cause damage. When young, they only feed on the leaf mesophyll on the underside of leaves, leaving leaf veins, etc. After growing larger, they eat the entire leaf. Control methods: 1. Eliminate overwintering cocoons in the tree basin, especially under the main root crown. 2. When larvae occur, spray the leaves with 50% dichlorvos at 800?1000 times dilution or 40% deltamethrin at 2000 times dilution.

Red-necked longhorn beetle: The larvae bore into and feed on the surface layer of branches and trunks, directly affecting growth, and in severe cases causing the entire branch or trunk and the whole tree to die. Control methods: 1. Before adults occur, apply whitewash (quicklime:sulfur powder:salt:water = 10:1:0.2:40) to the trunk or large branches to prevent adults from laying eggs. 2. During the occurrence period of adults, manually capture and kill adults. 3. During the damage period of larvae, use a wire to stab the larvae to death.

Apricot globular scale: Female adults or nymphs gather and fix on branches and trunks to suck sap and cause damage. This causes weakened tree vigor or branch death and drying. Control methods: 1. After the adult scale shell has formed and before the eggs hatch, scrape off the female insects. 2. During the nymph hatching period, spray 0.2 degrees Baume lime sulfur mixture or 50% dichlorvos at 1500 times dilution.