The cotton blind bug, a significant pest in cotton cultivation, belongs to the Hemiptera order and possesses sucking mouthparts. Both nymphs and adults are covered with a waxy layer, allowing them to move quickly and evade control measures. After extensive testing of various pesticides on the market, we found that a combination of phoxim and malathion provides the most effective solution. Laboratory and field trials showed remarkable results: 100% mortality within two hours, 98% corrected mortality in lab settings, and 95% in the field—placing this combination among the top-performing options.
Phoxim is a highly effective and low-toxicity insecticide known for its strong knockdown effect against the blind bug. However, it has a short residual activity, meaning the pests may recover if used alone. Malathion, on the other hand, offers multiple modes of action—stomach toxicity, contact killing, and fumigation. It’s a broad-spectrum insecticide with longer-lasting effects but less immediate impact compared to phoxim. Together, they complement each other well, making the combination ideal for control.
Currently, products like 25% octocin + malathion and 20% benzothiazide from Langfang Nori Agricultural Pesticide Plant are available on the market. These formulations include penetrants and synergists to enhance effectiveness. If these products are unavailable, mixing phoxim and malathion at the right ratio can achieve similar results. When cotton bollworms are also present, adding an appropriate amount of acephate can increase the overall efficacy.
The first critical period for prevention and control occurs in mid to late May, when the population starts to rise. At this stage, treatment should begin when one or two insects are found per 100 plants. The second key period falls in mid to early June, during the budding stage, when the second generation of nymphs emerges. Many adult bugs migrate into cotton fields, and infestation rates can reach 3% to 5%. At this point, prompt action is essential. The first and second generations tend to be more synchronized, so timely intervention makes control easier.
By late June, overlapping generations become common, and the population structure becomes less distinct. Cotton fields also start to close up, making monitoring more challenging. Inspect the main stems and fruit branches regularly for signs of damage. If the infestation rate reaches 5% to 10%, with more than five insects per 100 plants, immediate action is necessary. Control measures should be repeated every seven days until late September.
Effective management requires thorough treatment without leaving any pests behind. The blind bug has high reproductive potential, can hide from light, and moves easily between plants. Adults live for a long time, laying eggs just 1–2 days after emerging. Their egg-laying period lasts 30–40 days, with each female laying about 37 eggs. The egg stage takes 6–7 days, and the entire life cycle contributes to prolonged infestations, lasting from mid-May through early October.
To ensure complete eradication, strict adherence to integrated pest management principles is crucial. First, implement household-level control to prevent cross-infestation. Second, remove weeds around the field and manage surrounding host plants to reduce the initial pest population. Third, after treatment, check for remaining pests and keep their numbers below the threshold. If infestations are severe, continuous treatments are needed to prevent further multiplication and minimize crop damage.
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