invisible hit counter Pests attacking soybean plants - 10 Downing Nyc
Pests attacking soybean plants

Pests are one of the factors that lead to crop failures in soybean plants. The types of pests that affect this Palawija plant are very diverse. Each soybean pest will show symptoms of an attack and different ways to control it. Here are some common pests that attack soybean plants and how to deal with them.

1. Army caterpillar (Spodoptera litura)

The first type of soybean pest is the armyworm. Affected plant parts are young leaves and pods. Symptoms of a pest infestation include the leaves becoming transparent and appearing white from a distance. Strong attacks on young plants stunt growth and can lead to the death of the plant.

When armyworms attack the flowering phase and early pod formation, it can reduce crop yields. When the armyworm population is high, it risks causing crop failures as they affect seed filling. To reduce armyworm pest attacks, here are some control measures that can be taken:

• Carry out simultaneous sowing and crop rotation.
• Mechanical control by picking symptomatic leaves and removing armyworm eggs or imago.
• Biological control with biological insecticides.
• Use of chemical insecticides.

2. Peanut Flies

Soybean plants are endangered by pest infestation right from the start of planting. One of the pests that attack early in planting is the peanut fly. This pest can attack soybeans six days old after planting.
Symptoms of peanut fly pest infestation include white spots that are puncture marks from the egg-laying tool. These spots are usually located at the base of the cotyledons or the base of the leaf. The spots turn brown, and the cotyledons and young leaves see tortuous grooves, which are brown larvae. With further attacks, soybean plants begin to wither, wither and die.

Control measures that can be taken to suppress the peanut fly population are as follows:
• Plant plants simultaneously in a bed.
• Use straw mulch. Imago Monitoring.
• Use of effective and selective insecticides when infestations have crossed economic thresholds.

3. Caterpillar span

In addition to stylus caterpillars, tension larvae can also cause white spots on the leaves of soybean plants. This pest infestation usually starts at the beginning of flowering. The damage will continue to increase until the seed-filling phase or until the plant reaches 60 DAP. Passerine pests can cause a reduction in seed weight and reduce crop yields.

The method of suppressing the caterpillar population is not much different from controlling other species of caterpillars. Simultaneous sowing and crop rotation are effective to control measures as they can interrupt the life cycle of the caterpillar. In addition, destroy the imago caterpillar span. Control with chemical insecticides is permitted.

4. Case drill

The next soybean pest is the pod borer. As the name suggests, this pest affects soybean pods and seeds. Symptoms of a pod borer infestation can be identified by the round holes in the skin of the pods. When the pod opens, the inside of the caterpillar has brown or light brown feces. This pest can cause a decrease in the quantity and quality of the crop. Here are some ways to deal with Podbore attacks:
• Crop rotation
• Remediation of alternative hosts before planting soybeans
• Use of natural enemies
• Use of pesticides early in the growth
• Set traps

5. Soy Chocolate Ladybug

The brown soybean ladybird is a harmful pest of the soybean plant. This pest can suck the liquid on soybean seeds. As a result, soybean pods and seeds become flat, dry out, and fall off. If the attack occurs during the seed-filling phase, the pods will turn black and rot. When the pods are old, this pest infestation can cause the seeds to degrade with black spots and the seeds to wrinkle.
• Soy brown ladybugs can be controlled with the following steps:
• Implementation of simultaneous sowing and crop rotation
• Disinfect host plants before planting soybeans
• Using traps
• Use of insecticides

6. Soybean Leaf Beetle (Phalaedenia inclusa)

This beetle can infest young plants until just before harvest. Both adults and larvae can damage shoots, young petioles, pods, and leaves. Attacks on the germination phase can lead to the death of the plant.

The control of the soybean leaf beetle is carried out as follows:
• Plant simultaneously, no more than 10 days
• Manual control, ie kill pests individually
• Crop rotation with non-host plants
• Spraying insecticides with a control threshold, ie when the leaf damage intensity is more than 125% or 1 head / 4 plants

7. Whitefly (Bemisia tabaci)

These pests are nymphs, and adult nymphs damage plants by sucking plant fluids. Whitefly pest control is as follows:
• Simultaneous planting, no more than 10 days
• Crop rotation with non-host plants
• Use whitefly-resistant varieties
• Spraying insecticides

Diseases affecting soybean plants

Diseases affecting soybean plants can be caused by viruses, fungi, bacteria, and nematodes.

1. Leaf rust disease (Phakopsora pachyrhizi)

Symptoms are characterized by the presence of gray-brown spots that turn dark brown (reddish), like iron rust. These spots can be seen on the underside of the leaf. Combatting leaf rust disease is as follows:
• Use rust-resistant grades
• Crop rotation with non-host plants
• Simultaneous planting
• When infestation intensity has reached 33%, use Dithane and Benlate fungicides

2. Leaf spot (bacteria Xanthomons phaseoli)

Infestation symptoms on the leaves are some yellow-green dots. With the expansion of the point, small brown spots appear. The dots eventually fuse and dry up and then perforate, tearing the sheets, especially at the edges. The leaves fall off prematurely. The cause of this disease from rainwater, wind, and contact between parts of plants. The bacteria survive in seeds and plant debris in the soil. Control of leaf spot by using leaf spot-resistant cultivars.

By mutaqin