Control methods of peach spot moth
This insect, also known as apricot star caterpillar, plum moth, commonly known as red belly skin worm, harms the buds, flowers and tender leaves of peach trees with larvae. The damaged peach trees not only lose their yield, but also decline, which can cause the death of the whole tree in serious cases. The insect mainly harms peaches, plums, plums and apricots, as well as pears and persimmons. It is mainly distributed in North China and Northwest China, and has gradually spread in the Yangtze River Basin in recent years.
[occurrence regularity]
One generation a year. The young larvae overwintered in buds or tree trunk cracks and began to move again at the beginning of March of the following year, endangering flower seedlings and buds. The overwintering larvae mature and pupate from late April to mid-late May, and the pupal period is about 2 weeks. It began to occur from mid-late May to mid-June to early June, and the peak period was in late June. After a period of damage, it spread over the summer and winter.
[prevention and control methods]
The main results are as follows: (1) the characteristics of weak flying ability and long mating time of adults can be used to organize manpower to hunt and kill.
(2) during the active period of overwintering larvae in early March and the peak hatching period of larvae in late June, spraying 1000 times of 50% fenitrothion emulsion, or 3000 times of 90% crystal trichlorfon, or 3000 times of 20% fenvalerate emulsion, or 30% acephate emulsion for 1-2 times, has a good insecticidal effect.
(3) the overwintering larvae can be eliminated by spraying cutting, saw and bark cracks with 200 times of 80% dichlorvos EC or 25% quinathion EC during fruit tree dormancy.
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Gold perfume (pear)
The new cold-resistant pear variety Jinxianshui [Apple Pear x (Perfume Pear x Apple Pear)] is an excellent variety selected by Mudanjiang Agricultural Science Research Institute of Heilongjiang Academy of Agricultural Sciences. it was approved and popularized by Heilongjiang crop Variety examination and approval Committee in 1997. The variety has strong cold resistance, disease resistance and good quality. it can be eaten fresh and frozen. In recent years, 15000 hectares have been popularized in Heilongjiang, Jilin, Liaoning and Inner Mongolia Autonomous region. It has also been cultivated in other provinces in northern China, and now it has become the production of pear trees in cold regions.
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Long-term fresh-keeping and storage technology of jujube
1. Technical features. The application of this new technology can safely preserve fresh winter jujube for 6 months and 12 months, and the rate of rotten fruit is less than 5%. The storage results do not change color, do not deform, have no peculiar smell, and the sensory quality can reach 80% to 95% of that before storage. The preservation rate of vitamin c (vc), the main nutritional ingredient, is more than 80%, and the preservation rate of water and soluble solids content is not less than 95%. From postharvest storage to sale, green fruits with high vc content can be provided to consumers throughout the year without the use of any chemicals or radiation.
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