Thrips are insects that suck the cell sap, killing the plant slowly.
Reduction of
thrip was recorded in Neem extract (52.28%) followed by Neem oil (46.81%), Asafoetida (45.02%) and tobacco (43.40%) on cotton crop.
Thrip and aphid are major insect pests that damage the leaves and flowers by sucking the cell sap and reduce quality and quantity of plant [1].
Result showed varietal differences for adult populations of dusky bugs, jassid, white flies and
thrips were significant (P<0.5) but non-significant differences for mites.
In Brazil, information about
thrips and natural enemies associated with this plant is still scarce (BARBO SA et al., 2005).
schultzei were recorded on each leaf of the vine to verify the choice of the
thrips in relation to the position of the leaf, and in relation to the phenological stage of the plants.
In Ceara, there are also a few records of
thrips species, mainly associated with zucchini squash (Curcubita pepo L.), onion (Allium cepa L.) and tomato (Solanum lycopersicum L.) (Lima et al., 2011).
A significant negative correlation was observed between
thrips damage scores and total carbon concentration (r=-0.54) indicating that total carbon plays a significant role against
thrips damage in cowpea.
For example, a nonlinear regression model can write the increase of the number of
thrips found in a plant, after the seedlings emergence, related to time.