According to recent surveys, there are many types of flower diseases and insects, and the main diseases and insects are: whiteflies, American spotted fly, beetles, scarab beetles, chrysanthemum black spot disease, anthrax and so on.
Whitefly
The worm occurs on a variety of flowers, with poinsettia being the most affected. Recently, in PanyuHualong, Zengcheng Town Dragon, Fangcun and other places, a poinsettia, gerbera, little angel, green emperor, melon leaf chrysanthemum and other varieties of insects are large, with an average of 268.7 live insects in 100 plants, of which one poinsettia and gerbera blinds are 300-403 live insects. The insect state is dominated by nymphs, which is also the appropriate period for control. The insect has the characteristics of rapid reproduction, overlapping generations, strong drug resistance, etc., and it is necessary to grasp the nymph period to apply drugs to improve the control effect.
American spotted diving fly
This insect is the main pest of flowers such as chrysanthemums and dahlias. Recent surveys, the average leaf damage rate of 13.6%, 28 louver live insects, insect sentiment index of 3.2, it is expected that the insect will be moderately occurring.
Insects
At present, the density of insect mouths on the ficus ficus and cycads is relatively large, and the species of insect shell insects that occur are: shield borer, blowing cotton bug, wax bug, etc., the leaf damage rate is 7.8%, 929.3 live insects are blind, and the number of severe ones is as high as 4878.
cockchafer
The worm is a multi-feeding pest, the adult worm eats the leaves and petals, and the nymph is the root of the pest. According to recent investigations of chrysanthemums, velvet, green emperor, loose tail sunflower, etc., the leaf damage rate is 5%, and there are 2-6 live insects in 100 plants.
Chrysanthemum black spot disease
Recent weather is quite humid, very easy to induce the occurrence and development of the disease, according to the recent investigation of Lijin, Princess Anning and other chrysanthemum varieties, the incidence of black spot disease is more serious, the incidence of plants is 27.8%, the severity of up to 43%, the leaf incidence rate of 13.4%.
anthrax
The disease occurs on flowers such as gerbera, chrysanthemum, Hawaiian coconut, white palm and rich coconut, with a general plant incidence of 20.25%, a leaf incidence of 14.5%, and a severe rate of up to 61%.
In addition, some flowers are infested with thrips and red spiders, 100 live insect heads of lycophelia lyps, and 60 live insects of ficus fine-leaved figs.
Prevention and control methods
1. Control of flower whiteflies, and insect shell insects should seize the peak period of nymphs to control them with medicine.
Whitefly: Optional 10% Confort 2000x or 2% Carboridine 2000x or 10% Imidacloprid or Aphid 1000x Liquid Spray. Spray every 7-10 days, 2-3 times.
Ticks: 1000 times liquid spray such as 40% rapid culling or 1000-1500 times or 40% oxidized Leguo can be selected.
American Spotted Fly: 1.8% efouding or green cabbage 1000--1500 times or 40% Lesben 800 times liquid spray.
2. Prevent and control flower diseases, start to take drugs at the seedling stage or the early stage of the disease, spray once every 7 to 15 days according to the disease, and spray 3 to 5 times.
Chrysanthemum black spot disease: (1) remove the old diseased leaves and burn them centrally; (2) control of pharmaceuticals; Optional 50% carbendazim 500x or 80% dinoflagedan 800x or 25% distancing 1000---1500x liquid spray.
Anthrax: 50% ShiBao Gong 1000 times or 40% Shi Baole 1500 times or 75% Bacillus + 70% Tobzin 1000 times liquid spray is available.
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