Morphological characteristics and control techniques of Hemiptera pest rice green bug

The insect rice green bug belongs to Hemiptera, Pentatomidae. All sweet orange producing areas in China have occurred. In addition to harming citrus, it also harms rice, corn, peanuts, cotton, legumes, cruciferous vegetables, rape, sesame, eggplant, chili, potatoes, peaches, plums, pears, apples and so on. Adults and nymphs were used as harmful tobacco plants to suck the juices such as young leaves and stems at the top, and water-stained wilting often appeared in the parts where the leaves were pierced, and then dried up. In severe cases, the top tip of the upper leaf or tobacco plant wilted.

1. Morphological characteristics of rice green bug:

There are many forms of adults, and various biotypes often mate and reproduce with each other, so they are morphologically changeable.

1. Spot type

(green bug) is 13-4.5 mm long and 6.5-8.5 mm wide. All the back is orange to orange-green, and the monocular area has a small black spot, which is not very clear in general. The anterior chest dorsal plate has 3 green dots, the largest in the middle, often in the shape of an edge. The base edge of the small shield is the largest and nearly round in the middle of the three green dots, and its end and wing leathery part each have a green spot on the back end.

2. Yellow shoulder type

(yellow-shouldered green bug) 12.5-15 mm long and 6.5-8 mm wide. It is similar to the representative type of rice green bug, but the head and the front half of the forechest dorsal plate are yellow, the yellow area of the forechest dorsal plate is sometimes orange-red, orange-red or brown-red, and the trailing edge is wavy. Oval ring-shaped, light brownish yellow at birth. There is a ring of white odontoid process at the top of the egg. The nymph is 5 years old and looks like an adult, green or yellowish green, with black spots on the forechest and wing buds, orange on the outer edge and semicircular erythema or brown spots on the ventral margin. The feet are reddish brown and the tarsus and antennae are black.

3. All green type

(representative) 12-16 mm in length, 6-8 mm in width, oval, bright green in body and feet, head nearly triangular, black at the end of the 3rd and 4th and 5th segments of the antennae, and the rest turquoise. One eye is red, the compound eye is black. The angle of the anterior chest dorsal plate is obtusely round, and the anterior lateral edge has a narrow yellow edge. The small shield has a long triangle, a narrow circle at the end, three small white spots at the base edge and a small black spot outside the corners on both sides. The color of the abdomen is light and the back of the abdomen is all green.

2. Control techniques of rice green bug.

1. Reduce the source of insects

During winter and spring, combined with fertilizer to remove weeds near the edge of the field, reduce the source of overwintering insects.

2. Manual hunting and killing

Taking advantage of the poor flying ability of adults in the morning and evening, artificial hunting was carried out.

3. Chemical control

During the peak period of nymph outbreak, when the cluster is not dispersed near the egg shell, you can choose 90% trichlorfon 700 times, 80% dichlorvos 800 times, 50% fenitrothion EC 1000 times, 40% dimethoate 800 times, 25% imidophos 700 times, or pyrethroid pesticides 3000 times 4000 times.