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Occurrence and control of main diseases and insect pests in summer flowers
According to recent surveys, there are many types of flowers and insects in the current situation, and diseases are more prevalent. The major pests and diseases that occur are: whitefly, Liriomyza sativae, scale beetle, chafer, chrysanthemum black spot, and anthrax. The whitefly, which occurs on a variety of flowers, suffers the most damage from poinsettia. Recently, in Panyu Hualong, Zengchenglong, Fangcun, and other places, investigations have found that there is a large amount of insects such as poinsettia, gerbera, cherubs, green emperors, and chrysanthemums. The average number of live insects is 268.7, of which 100 species of live worms are poinsettia and gerbera. Worm 300-403 head. Insects are dominated by nymphs and are also suitable for control. The worm has the characteristics of rapid propagation, overlapping generations, and strong resistance to drugs. It is necessary to grasp the nymph-phase application and improve the control effect. Liriomyza sativae This worm is a major pest of flowers such as chrysanthemum and dahlia. According to a recent survey, the average leaf damage rate was 13.6%, 28 live worms, and 3.2, and it was estimated that the worm would have a moderate incidence. The current populations of the scale insects are the greater density of the larvae and the cycads. The types of scale insects that occur are: shield larvae, blown cotton pods, wax locusts, etc., and the leaf damage rate is 7.8%, with 923.3 live worms, Seriously up to 4878 heads. The beetle is a polyphagous pest, and the adult insects eat leaves and petals, and the nymphs harm the roots. According to a recent survey of chrysanthemums, velvet, green emperors, and diviflora, the leaf damage rate was 5%, and 100 live insects were 2--6 heads. Chrysanthemum black spot disease is very humid in recent days and can easily induce the occurrence and development of the disease. According to recent investigations of the chrysanthemum varieties such as Lijin and Anning princesses, the incidence of black spot disease is heavier. The incidence rate of the strain is 27.8% and the severity is as high as 43%. The incidence of leaf is 13.4%. Anthracnose The disease occurs in flowers such as gerbera, chrysanthemum, Hawaiian coconut, white palm, and rich coconut. The incidence rate of general strains is 20.25%, the incidence of leaf is 14.5%, and the severity is as high as 61%. In addition, part of the flowers were affected by thrips and spider mites. Among them, 100 live worms were headed for gerbera, and 60 live worms were for pods. Prevention and control of 1, prevention and control of flower aphid, scale insects should grasp the nymph peak drug control. Whitefly: It is possible to use 2000% of 10% Confodol or 2000% of 2% insecticide urea or 10% of imidacloprid or 1000 times of propadiene. Spray once every 7-10 days, spray 2 - 3 times. Scale insects: Use 40% speed culling or speed gram 1000-1500 times or 40% omethoate 1000 times spray. Liriomyza sativae: 1.8% edward or green vegetable treasure 1000--1500 times or 40% Lobster 800x liquid spray. 2, prevention and treatment of flower diseases, in the seedling stage or early onset of drug use, depending on the condition every 7 to 15 days spraying once, even spray 3 to 5 times. Chrysanthemum black spot disease: (1) remove old diseased leaves and concentrate burning; (2) chemical control; use 50% carbendazim 500 times or 80% adriamycin 800 times or 25% against 1000-1500 times Liquid spray. Anthracnose: The use of 50% Shi Bao Gong 1000 times or 40% Shi Bao Le 1500 times or 75% chlorothalonil + 70% thiophanate 1000 times spray.