How to prevent insects and diseases in Guilin horseshoe

Hyphantria equisetifolia is the main pest of horseshoe. Its larvae eat stems, which make them brown and rot, and finally the whole plant dies. Stem blight, also known as horseshoe disease, is also known as "red leaf disease" locally, which is the most important disease of horseshoe. The disease is a fungal disease, with rapid onset and rapid expansion, which causes the horseshoe stem to die in pieces and is red.

1, control strategy of white moth:

Firstly, 3% Mi Le granules were used to control water chestnut seedlings, and 90% monosultap was used to control them once before transplanting, and the unhatched egg blocks on the seedlings were removed.

Second, Honda mainly controls the third generation and suppresses the fourth generation. Generally, after the calla lily is transplanted to a living tree in early August, the adult moth appears in the field for control once, and is sprayed once at the peak of incubation and once at the peak of young moth. Chemicals can be 3% Mi Le granules, 98% Bataan or 90% pesticides. When applying pesticide, shallow water layer should be left in the field to improve the control effect.

2, stem blight prevention and control methods:

One is to treat calla lily bulbs and calla lily seedlings with chemicals. Using 250-fold solution of 25% carbendazim wettable powder or 800-fold solution of 50% thiophanate-methyl wettable powder, soaking bulbs 18-24 hours with liquid medicine before seedling raising, and soaking water chestnut seedlings 18 hours with liquid medicine before planting can play a very good role in disease control.

The second is to seize the appropriate period of prevention and control, and choose pesticides with high efficiency, low toxicity and low residue for prevention and control. When a small number of diseased plants are found, 77% propargite, 25% carbendazim and 65,438+00% world advanced pesticides can be used for prevention and control, and sprayed again after 65,438+00 days, continuously for 2-3 times, and replenished in time after rain.