Leaf-rolling weevil | Plant Pest, Garden Pest & Agriculture Pest ...
leaf-rolling weevil, (family Attelabidae), any member of a subgroup of the weevil family, Curculionidae (insect order Coleoptera) whose females protect newly laid eggs by rolling them up inside a growing leaf. After hatching, the larvae eat the leaf from within.
Rice Water Weevil - Field Guide to Common Texas Insects
Female weevils insert white eggs into leaf sheaths under water. In 4 to 9 days, tiny (1/32 inch), white, slender, legless, C-shaped larvae or grubs hatch from eggs and develop through four stages (instars) for about 27 days until they are about 1/3 inch long.
Weevils on Trees and Shrubs | University of Maryland Extension
2024年10月17日 · They deposit eggs in inconspicuous folds of leaf fragments, primarily in litter around the base of the host plant. Most of the adult damage occurs close to the ground, usually on new and inner foliage. Defoliation becomes more evident by late summer as the growth rate of the plant slows down and the effect of continuous adult feeding accumulates.
Leaf Twisting Weevil | Pests & Diseases - Plantix
The life cycle of this pest includes different stages: eggs, five larval instars in the grub stage, pupa, and adult. The adult lays eggs one by one in the outer part of the twisted leaves. The female weevil secretes a sticky substance that helps the eggs stick to the leaf surface.
The leaf weevil laid eggs mostly on the tips but some time along the margins of the leaves. By the action of legs, female folds the leaf margins to cover the eggs laid. Leaves showing such folds were a sure indication of leaf weevil egg laying (Fig. 1). Fig 1: Eggs laid inside folded leaf tip The freshly laid eggs of leaf weevil were uniformly ...
leaf-rolling weevil - Homoeolabus analis; thief weevil
Eggs: The eggs of Homoeolabus analis are spherical and yellowish. Those of Pterocolus ovatus are smaller, more whitish, and slightly oval in shape. Figure 5. The egg of Homoeolabus analis (Illiger), a leaf-rolling weevil. Note oviposition slit to right of egg. Photograph by Donald W. Hall, University of Florida.
White Pine Weevil - MSU Extension | Montana State University
They feed on the main branches near the leader and insert eggs into feeding cavities. Eggs hatch in about two weeks, and the larvae will tunnel under the bark. The larvae pupate, and adults emerge in late July through August. The adults overwinter in …
Oak leaf-rolling weevil (Homoeolabus analis) - Colin …
2018年8月5日 · These structures are made by the oak leaf-rolling weevils in the subfamily Attelabinae (the “leaf rolling weevils”, appropriately) and they are called nidi (Latin for “nest” or “place where egg is placed”). Several species nidify (yes, it’s a verb) oak but perhaps the most common species is Homoeolabus analis. I caught a female in ...
AET 201: 2. Leaf twisting weevil - e-Krishi Shiksha
The adult weevil has the habit of cutting and twisting the mango leaves into shapely thimble like rolls which remain attached to the parent leaves. The grub feeds on the leaf tissue within the leaf roll. The adult weevil is medium sized, reddish brown with a long snout. Eggs are laid in each leaf roll. The grub pupates within the leaf roll.
Contradictory effects of leaf rolls in a leaf-mining weevil
2020年7月22日 · The failure-in-access hypothesis is that eulophid wasps can find hosts and attempt to parasitize, but the leaf roll acts as a structural barrier and eulophid wasps cannot reach weevil eggs or larvae. Considering that leaf rolls in this experiment were loosely rolled and oviposition sites would be easy to access, the plausibility of this ...
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