Disinfection methods of pear storeroom
(1) bleach: 10% solution of bleach containing 25% available chlorine and 30% available chlorine. Spray with the clear liquid above according to the amount of 40mL per cubic meter of storage capacity. Pay attention to protection when using. The storeroom must be ventilated and deodorized after use. (2) formalin: according to the proportion of formalin with 15mL per cubic meter of storage capacity, put an appropriate amount of potassium permanganate or quicklime, add some water, when gas occurs, fumigate the warehouse door for 6 hours for 12 hours, open the warehouse for ventilation before using the warehouse.
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Magnolia mandshurica
Manglietia mandshurica is a large evergreen tree of Magnoliaceae and Magnolia, which is also known as Manglietia mandshurica because of its flowers and fruits. The shape of the tree is tall and straight, the leaves are beautiful and strange, and the flowers are fragrant. Manglietia mandshurica bark dark gray, lenticellate, smooth. Twigs, buds, young leaves, petioles and fruit pedicels are densely covered with brown tomentose, and the leaves are thick leathery. The flowering period is from the end of April to the middle of May, and the fruit ripening period is in the middle and late October. The aggregate fruit is ovoid and the fruit is verrucous protruding on the back. Manglietia mandshurica is naturally distributed in Guangdong, Guangxi, Fujian, Hunan and other places in China.
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What are the morphological characteristics, harmful characteristics and living habits of jujube pink scale
Jujube powder scale adult flat oval, about 2.5 cm long, the back is slightly raised, densely covered with white wax powder, the body edge with acicular wax tail has a pair of long waxy tail hairs. The nymph has a flat and oval body, well-developed feet and brown legs. The egg is oval and consists of white waxy floc. The jujube pink scale has three generations a year, overwintering with nymphs in the bark, starting its activity in April, laying eggs in early May, and the egg period is 9-10 days. The peak period of nymphs of each generation is early June, mid-July and mid-September. A large number of overwintering began in early October.
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