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.
This insect mainly harms branches and leaves with adults and nymphs. The damaged leaves were withered and yellow, and the jujube fruit wilted, resulting in the weakening of the tree potential and the decrease of yield.
What are the main measures to control jujube pink scale?
(1) scraping trees to eliminate overwintering nymphs.
(2) during the occurrence of the first generation nymphs, spray control can be carried out by using 1 Muthamel 2 degree stone sulfur mixture, pine ester mixture 25 Mel 30 times, 25% quinathion EC 1000 Mel 2000 times.
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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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New varieties of apricot and plum
The flavor rose is the earliest American red flesh type apricot and plum hybrid variety. Its fruit is flat and round, the fruit is purple-black, the fruit surface is bright and bright, the fruit is very beautiful, the flesh is bright red, fragrant and sweet, and the quality is excellent. The soluble solids content is 17.2%, the fruit weight is 100120g, the fruit ripening period is in mid-late May, and the fruit development period is 80rel 85 days. The variety grows vigorously. The branching ability of branches is strong, and a large number of flower buds can be formed in the same year.
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