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As far as the lawn of the Shantou residential community is concerned, the pests of the ground tiger and Spodoptera are mainly harmful. For a dry, yellow lawn, we often think that watering is not timely, resulting in lack of water or trampling or being affected by chemicals. In actual fact, except for the above factors, the main reason is the harm of lawn pests. So how do you identify these pests? The following describes only a few simple identification methods.
First of all, we must master the main time that the lawn is harmed, generally from late April to mid-November. This is the premise of the following identification methods.
Method one: The method of using water, that is, watering the lawn and flooding the lawn, at this time, insects like cabbage caterpillars will float on the water. If there are more than 10 pests per square meter, it means that the lawn is seriously damaged. .
Method two: The method of natural enemies is to have groups of birds (usually sparrows) looking for food on the lawn and eating pests. After chasing them, they are also reluctant to fly away. Even after they leave, they fly back later. Well, it is certain that there are many pests in the lawn.
Method 3: Observe the method of worms, that is, in a green lawn, there are local turfs looking far yellow, close to bare, sporadic leaves with wormholes, nicks, perforations, and a window-like pattern, at this time, as long as the lawn is open You will find bugs inside. According to the status of insects to determine the degree of harm to pests: 1 insects into groups, containing water, green grass, then it is fully recognized that a large number of pests on the lawn; 2. Insects semi-humid, dark green, indicating a small number of pests on the lawn ; 3. The moth is dry, light green, indicating that the lawn has been compromised.
The above methods are convenient and quick methods for identifying lawn pests for those who do not have professional lawn maintenance expertise. So, how to prevent it? There are many methods for controlling turfgrass underground pests. For the moment, the main focus is on chemical control. It is a relatively simple and effective method of prevention and control.
In chemical prevention and control, different chemical drugs should be used for different pests. In the southern coastal areas, the ground tigers and Spodoptera litura mainly harm the lawn. For the control of tigers, it can be divided into three steps:
1. In the spring, after the lawns are all pruned, use 3% carbofuran particles, 8-12 pounds per acre, and fine sand in a ratio of 1:1 to spread evenly;
2) Spawning period is controlled by 48% of Lothian 1000 times liquid;
3. In the incubation period and in the prosperous period, use 90% of trichlorfon 600-800 times, 50% of phoxim 800-1000 times, and 2.5% of deltamethrin 800-1000 times. The pests have drug resistance, and the first two can be mixed 1000 times, and the control effect is better.
For the prevention and control of A. zeaoniae, in addition to the above-mentioned pesticides and steps, it is also possible to use 50% of dichlorvos 600-800 times solution or one of the two types of pesticides previously mixed to control 1,000 times the amount of the pesticide. Can also be used 40% of omethoate EC, 54% of methamidophos EC 1000-1500 times solution, but pay attention to the best not to use highly toxic pesticides.
Identification and Control of Lawn Underground Pests
Underground pests, also known as earthworm pests, feed on the underground parts (seeds, roots, stems) of the lawn and the tender stems on the ground near the ground. It is a special group of pests. It has a wide variety of species and is widely distributed. It is an important pest for turfgrasses, pastures, and farm plants. The main pests that harm the lawn include gold turtles A, golden needles, crickets, noctuids (including night moths, and ground tigers).