Banana pest control must be timely

Bananas and butterflies, also known as banana leaf curl insects, banana locusts, mainly damage bananas, pink bananas, plantains and other banana genus plants, larvae silk roll leaves into a leafhopper, hiding in banana leaves taken, serious At that time, the banana plant had a large number of leaves, and the banana leaves were incomplete. Even the midribs remained, which hindered growth and affected yield.

First, the morphological characteristics

1. Adult female adults are 28-31 mm in length, male adults are 24-27 mm in length, dark brown or dark brown butterflies. The head is densely covered with gray-brown scales. The tentacles at the end of the antennae are swollen and nearly white. The fore wings are gray-yellow scales near the base, two nearly rectangular large yellow spots in the middle of the wings, and a nearly square small yellow spot near the outer edges, and both front and rear wing hairs are white.

2, oval spherical and slightly flat, the surface of the egg shell radial white lines, when the initial production of yellow, gradient red.

3, larvae grow larvae body length 50-64 mm, body was white wax powder. The head is black and slightly triangular. The first and second quarters of the ankle contract, resembling a neck. The middle part of the body is thicker, and the back end is tapered. Each body section has stripes.

4. The carcass is 35-41 mm long, and it is quilted, cylindrical, light yellow, and white wax powder. The muzzle stretches beyond or beyond the end of the abdomen and the base end is separated from the body.

Second, the occurrence characteristics of bananas and butterflies in Guangdong occurred in 4-5 generations a year, with mature larvae in the leafhopper winter. In the following March, larvae were eliminated and gradually emerged as adults. The larvae are infested during the period from May to June, and the egg period in summer and autumn is about 5 days. The larval duration is about 25 days, and the duration of pupa is about 10 days. Adults have many activities in the early morning, late evening and cloudy days, flying quickly and taking nectar. After hatching, the larvae feed on their egg shells, then climb to the edge of the leaves to bite a notch, and then the silky leaf turns into a cylindrical leafhopper to hide. The body surface secretes a large amount of white wax powder. In the morning and evening or on a cloudy day, the head feeds on the leaves downwards. After the body grows up, another knot will damage it.

Third, control methods

1. Agricultural control focuses on the elimination of overwintering larvae, seriously cleans up the plantation, and collects insects for centralized treatment. At the peak of damage, artificial worms can also be used to remove worms or larvae.

2. Chemical control In the stage of young larvae, spray 300 times of 90% trichlorfon crystals, or use Trichoderma spp. to mix the trichlorfon crystals (1:1) 800 times.

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