Home › Growing Techniques › Article

Many holes and black spots on new cotton leaves? Watch out for tarnished plant bug damage

Growing Techniques 0 views
A text message from mobile phone 139****8164: There are many small holes and many small black spots on the new cotton leaves. What is going on? What pesticide should be used? Answer: It is very likely caused by the piercing-sucking damage of the tarnished plant bug. When the tarnished plant bug pierces and sucks at the growing point at the top of the cotton plant, it causes tissue necrosis and forms needle-point-like black spots. Later, as the healthy tissue grows, irregular holes form in the leaves (their edges heal well, which distinguishes them from perforation caused by disease). The tarnished plant bug is a pest that occurs frequently and in large numbers in cotton production in recent years,

A text message from mobile phone 139****8164: There are many small holes and many small black spots on the new cotton leaves. What is going on? What pesticide should be used?

Answer: It is very likely caused by the piercing-sucking damage of the tarnished plant bug. When the tarnished plant bug pierces and sucks at the growing point at the top of the cotton plant, it causes tissue necrosis and forms needle-point-like black spots. Later, as the healthy tissue grows, irregular holes form in the leaves (their edges heal well, which distinguishes them from perforation caused by disease).

The tarnished plant bug is a pest that occurs frequently and in large numbers in cotton production in recent years, and its damage is relatively severe. It should be prevented early according to pest forecasts. If pesticide is applied only after holes appear on new stems and leaves, the stem tips die, and a large number of squares and bolls drop, the effect on protecting yield is poor. Pesticides with relatively good control effects on the tarnished plant bug include butene-fipronil, acetamiprid, nitenpyram, abamectin, malathion, cypermethrin, and others.

Related Articles