Control of pear gall midge
Pear flower gall midge, also known as bud maggot, belongs to diptera gall midge family. The adult lays eggs in the flower bud. After the eggs hatch, the larvae (maggot) drill into the flower bud to eat the stamen. The injured flower bud cannot open normally and falls off after withering. In recent years, the damage of pear gall in our county tends to be serious. The average damage rate of single flower in 2006 is 3.25%, and the serious pear orchard is 27.64%. The average damage rate of single flower in 2007 is 9.25%, and the serious pear orchard is 45.7%, which has seriously affected the fruiting rate of pear trees.
According to the observation of pear garden on March 9-10 of this station, combined with the current weather forecast, it is expected that pear trees will enter the white stage of flower buds on March 14 - 17. According to the practice of control experiment in recent years, it is suitable to control this insect at the white stage of pear bud, and the control method is to spray 80% dichlorvos 500 times solution or 90% crystal trichlorfon 500 times solution evenly on the tree crown and ground.
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Wangmu Hongxiantao and its production and cultivation techniques
Wangmu Hongxiantao is a new late-maturing and high-quality peach variety in China, which belongs to the northern variety group. The main results are as follows: (1) the characteristic fruit is large, with a single fruit weighing 700g to 1000g, which is the king of peaches; red in color, bright red after maturity, with more than 70% coloring of fruit surface; sweet, crisp and tender pulp, sweet and refreshing: late ripening, resistant to storage and transportation, flowering in early April, fruit ripening period from the end of October to early November, can be stored in the ordinary indoor to the Spring Festival, stored in a constant temperature storage, can be stored until the end of February to early March.
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Key points of cultivation of Red late ripening Pear Hong Anjiu
Honganjiu late ripening pear is a new variety of thick red bud of Anjiu pear found in Washington State of the United States. Shandong Province was introduced from the National Pear seed Garden of the United States Department of Agriculture in 1997. The cultivation experiments in various places show that this variety has strong adaptability, easy cultivation, high fruit firmness and resistance to storage and transportation. it is a late-maturing pear variety with good comprehensive characters. The fruit of this variety is gourd-shaped, the average weight of single fruit is 230 grams, and the maximum weight of single fruit can reach 500 grams. The pericarp is purplish red, smooth, waxy and glossy, with many, small and obvious fruit spots.
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