Classification of Thymicidae, Thripidae.
A. Ochre Hummer Scirtothuips dosalis Hood
1, damage
Adult and nymph-damaged leaves of mango trees are wilted with hot water scald and damage the fruits to give them brownish rough spots on the surface. This worm still harms crops such as tea trees and bananas.
2. Morphological characteristics
Adult body is about 1.0 inch long, yellow, gray and transparent wings, long wings, multi-fine hair, head width is about 1.8 times longer, compound eyes slightly dark gray, monocular 3 bright red, tentacles 8 save head length 3 times, before The chest width is 1.5 times longer and the trailing corner has 1 pair of thick and short stabs.
Eggs pale yellow, kidney-shaped.
The nymphs are milky at the time of their initial hatching and become light yellow afterwards. The form appears to be adult.
3, living habits
The generation of algebra is unknown. When the temperature is high, it can be completed in 1 more than 10 days. Both nymphs and nymphs can injure the leaves and fruits; the damaged leaves become lighter in color and resemble hot water scald. The number of insects on one leaf is 19; the fruit surface of the damaged fruit has brown lines or stripes, resulting in a rough fruit surface and thus reduced Commodity value, this mandarin is harmful to the size of soybeans in mango fruits. Usually the insects are hidden under the sepals. When the damage is severe, the small fruits are dried up. The appearance of the damaged small fruits is brown lines (plaque) and grows with the small fruits. These line (plaque) patterns also grow and grow thick, and the fruit surface becomes rough when the fruit matures.
4. Control methods
When this pest was found to be harmful, it could be sprayed with 80% dichlorvos or 40% Dimethoate 2000 times, or 20% extinction or 2.5% enemies killed 4000 times. In severe cases, spray once every 7 days and spray 3 times.
Second, the red band horse Selenothrips rubrocinctus (Giard)
1, damage
The adults and nymphs infested the leaves of mango tree seedlings, causing countless spots of black stains, darkened tips, curled leaf edges, and finally all the leaves fell and the whole plant withered; the insects still discharged red liquid exudates on the leaves and waited for their dryness. After the emergence of rusty brown or black spots, affecting photosynthesis. This insect is still harmful to rubber, coffee, cashew, litchi, longan, citrus and other crops.
2. Morphological characteristics
The adults are long, dark brown, 1.0 to 1.5 inches in length, and their mandible hairs are gray and black.
Egg kidney-shaped, yellow-white, about 0.25 inches long.
The nymphs are long, yellow, with a red band at the base of the abdomen, and are approximately 1.0 inches long when fully grown.
The dragonfly is long-shaped, about 1.0 inch in length, and resembles a nymph, but has fully developed wing buds.
3, living habits
It takes about 10 generations. Parthenogenetic female females lay a single egg on the underside of the leaf with a drop of similar fecal matter. The egg period was 1 to 3 days and the pupa period was 6 days. Adults and nymphs often live in depressions or small ditches near the main veins. They often tilt their abdomen ends and have a spherical droplet at their ends.
4. Control methods
When it occurs, it can be sprayed with 40% dimethoate or 50% killer pine or 80% dichlorvos 1500 times to control.
Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone
Hand Liquid Soap,Hand Soap,Hand Sanitizer Gel,Aloe Hand Soap
Wuxi Keni Daily Cosmetics Co.,Ltd , https://www.kenicosmetics.com