Which pesticide is effective for controlling the red wax scale
Along with the large-scale prohibition of organophosphorus pesticides on citrus, how to control citrus scale insects has already given many growers a headache, and among them the control of the citrus red wax scale is even more difficult. So what pesticide is used for the red wax scale?
Control of the red wax scale: according to the characteristics of the morphological structure of the red wax scale, special attention should be paid to observing the pest situation, and spraying should be carried out about two times, seizing the peak and the end of the hatching period of the young scales. In the control of the red wax scale, while carrying out chemical control, comprehensive control measures such as pruning infested branches, strengthening fertilizer and water management, and protecting and utilizing natural enemies should be combined. For chemical control, a 2000-fold dilution of 40% Sujieqing can be sprayed.
The pesticides for controlling scale insects include: 40% “methidathion” emulsifiable concentrate at 1000-fold dilution, 40% “isocarbophos” at 1500-fold dilution plus 25% “buprofezin”, 35% “Weilike” at 1000-fold dilution and 35% “Jieshike” at 1000-fold dilution and other scale-killing agents; choose 1—2 kinds and use them alternately.
Introduction to the citrus red wax scale
The female adult is 2.5mm long, oval, with the back arched upward. Antennae have 6 segments. The mouthparts are relatively small, located between the front leg coxae. The legs are small, the tibiae are slightly thickened, and the tips of the tarsi taper. The mesothoracic and metathoracic spiracles are well developed and trumpet-shaped. The waxy covering on the body surface resembles a small red bean. The mature adult has 4 spiracles with 4 white wax bands curled upward, and a white navel-shaped spot in the center of the scale cover. The male adult is dark red.
1. Number of generations. In most tea regions, 1 generation occurs per year.
2. Overwintering and source of infestation. It overwinters as fertilized female adults on branches and trunks.
3. Newly hatched nymphs are good at crawling. After settling for 2 to 3 days, they begin to secrete wax.