Onion thrips are the most important insect pests of onions, which cause significant economic losses, by reducing yields up to about 60%.Their damage to young onions is more devastating than on larger plants late in the growing season. However, thrips feeding opens up the onion to secondary infections.
Mango gall midge is a major pest of mango and is found in all mango growing countries of the world. Its feeding induces the formation of small galls, which look like pimples on the leaves. Serious outbreaks result in defoliation and reduced fruit yield.
Eudocima phalonia is a serious adult pest of ripe and ripening fruits for a wide range of fruits. The adult moth flies at night and sucks out the juices of fruits with its proboscis. The fruit doesn’t have to be fully ripe as long as its skin is soft enough to be pierced by the moth. A brown, circular, rotten area develops round the tiny puncture hole and the fruit is ruined for commercial sale.
Thrips are tiny slender insects with fringed wings. They feed by puncturing their host plant thus feeding on cell sap. Thrips belong to order Thysanoptera. Western flower thrips (Frankliniella occidentalis) is the most commonly marked species in green house rose plants and summer flowers
Tomato thrips is one of the most important insect pests of tomato crop, which causes significant economic losses, both directly and indirectly. They possess piercing-sucking mouthparts and feed on the mesophyll and epidermal cells of plant tissues.
The squash vine borer is a serious pest of vine crops, commonly attacking squash, pumpkins, and gourds. Cucumbers, butternuts, and melons are less frequently affected. These insect pests usually occur in low numbers although their presence is usually not noticed until after the damage is done.
Rose aphids, also known as greenfly or blackfly are sap-sucking tiny pear-shaped insects with slender legs that live in colonies on the underside of rose bush leaves and flower buds. They reproduce very fast, leading to massive infestations and entirely covering new shoots if left untreated. This can cause serious damage to the crop.
The spiraling whitefly (Aleurodicus dispersus) belongs to the family Aleyrodidae and is believed to have originated in the wet tropics of Central and South America. Aleurodicus dispersus is polyphagous, i.e., it is not reliant on a single host but can feed on many different species of plant.
The bean aphid is a dark green to dark gray soft-bodied insect oftenly found in dense clusters on tender new growth.It belongs to the family Aphididae, and is among the most destructive insect pests, which uses its piercing sucking mouthpart to feed on plant sap. The prolific reproductive capabilities of bean aphid has made it a notorious enemy of farmers and gardeners.
Brassica aphids are green gray insect pests with a white waxy coating, which commonly occur in dense colonies, often covered with waxy droplets. They cause misshapen leaves, spread virus diseases and produce a sugary substance called honeydew, which sticks on the leaves and encourages a black fungal growth.